/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-proofs/queue-add-2-IKG.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:07:24,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:07:24,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:07:24,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:07:24,957 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 [2021-02-19 20:07:25,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:07:25,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:07:25,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:07:25,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:07:25,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:07:25,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:07:25,006 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:07:25,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:07:25,007 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:07:25,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:07:25,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:07:25,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:07:25,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:07:25,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:07:25,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:07:25,009 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:07:25,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:07:25,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:07:25,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:07:25,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:07:25,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:07:25,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:07:25,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:07:25,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:07:25,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:07:25,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:07:25,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:07:25,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:07:25,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:07:25,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:07:25,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:07:25,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:07:25,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:07:25,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:07:25,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:07:25,407 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:07:25,408 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:07:25,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/queue-add-2-IKG.wvr.bpl [2021-02-19 20:07:25,424 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/queue-add-2-IKG.wvr.bpl' [2021-02-19 20:07:25,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:07:25,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:07:25,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:07:25,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:07:25,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:07:25,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:07:25,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:07:25,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:07:25,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:07:25,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/1) ... [2021-02-19 20:07:25,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:07:25,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:07:25,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:07:25,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:07:25,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (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 [2021-02-19 20:07:25,603 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:07:25,604 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:07:25,604 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:07:25,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:07:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:07:25,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:07:25,605 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:07:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:07:25,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:07:25,606 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 20:07:25,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:07:25,843 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 20:07:25,845 INFO L202 PluginConnector]: Adding new model queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:07:25 BoogieIcfgContainer [2021-02-19 20:07:25,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:07:25,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:07:25,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:07:25,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:07:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:07:25" (1/2) ... [2021-02-19 20:07:25,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf699ab and model type queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:07:25, skipping insertion in model container [2021-02-19 20:07:25,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:07:25" (2/2) ... [2021-02-19 20:07:25,852 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-IKG.wvr.bpl [2021-02-19 20:07:25,857 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:07:25,857 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:07:25,861 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:07:25,861 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:07:25,891 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 20:07:25,905 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 20:07:25,920 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:07:25,920 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:07:25,920 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:07:25,921 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:07:25,921 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:07:25,921 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:07:25,921 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:07:25,921 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:07:25,929 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2021-02-19 20:07:25,940 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 20:07:25,949 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:25,950 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:25,950 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:25,954 INFO L82 PathProgramCache]: Analyzing trace with hash -298257361, now seen corresponding path program 1 times [2021-02-19 20:07:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:25,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002732377] [2021-02-19 20:07:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:26,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002732377] [2021-02-19 20:07:26,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:07:26,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:07:26,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425242335] [2021-02-19 20:07:26,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:07:26,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:26,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:07:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:07:26,114 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 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 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) [2021-02-19 20:07:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:26,165 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-02-19 20:07:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:07:26,167 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 [2021-02-19 20:07:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:26,175 INFO L225 Difference]: With dead ends: 84 [2021-02-19 20:07:26,175 INFO L226 Difference]: Without dead ends: 84 [2021-02-19 20:07:26,177 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:07:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-19 20:07:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-02-19 20:07:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 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) [2021-02-19 20:07:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2021-02-19 20:07:26,235 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2021-02-19 20:07:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:26,236 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2021-02-19 20:07:26,236 INFO L481 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) [2021-02-19 20:07:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2021-02-19 20:07:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:07:26,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:26,239 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:26,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:07:26,240 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:26,243 INFO L82 PathProgramCache]: Analyzing trace with hash 800493516, now seen corresponding path program 1 times [2021-02-19 20:07:26,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:26,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310998231] [2021-02-19 20:07:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:26,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310998231] [2021-02-19 20:07:26,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695003684] [2021-02-19 20:07:26,539 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 [2021-02-19 20:07:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:07:26,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:26,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:26,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-02-19 20:07:26,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261670139] [2021-02-19 20:07:26,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:07:26,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:26,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:07:26,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:07:26,883 INFO L87 Difference]: Start difference. First operand 84 states and 163 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) [2021-02-19 20:07:27,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:27,115 INFO L93 Difference]: Finished difference Result 167 states and 303 transitions. [2021-02-19 20:07:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:07:27,116 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 19 [2021-02-19 20:07:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:27,121 INFO L225 Difference]: With dead ends: 167 [2021-02-19 20:07:27,121 INFO L226 Difference]: Without dead ends: 132 [2021-02-19 20:07:27,123 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-19 20:07:27,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2021-02-19 20:07:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.956043956043956) internal successors, (178), 91 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 178 transitions. [2021-02-19 20:07:27,144 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 178 transitions. Word has length 19 [2021-02-19 20:07:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:27,144 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 178 transitions. [2021-02-19 20:07:27,144 INFO L481 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) [2021-02-19 20:07:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2021-02-19 20:07:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:07:27,146 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:27,146 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:27,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 20:07:27,354 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash -420413942, now seen corresponding path program 2 times [2021-02-19 20:07:27,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:27,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638115179] [2021-02-19 20:07:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:27,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638115179] [2021-02-19 20:07:27,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524990370] [2021-02-19 20:07:27,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:27,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:27,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:07:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:27,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:27,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-02-19 20:07:27,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335588842] [2021-02-19 20:07:27,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:07:27,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:07:27,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:07:27,656 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-02-19 20:07:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:27,926 INFO L93 Difference]: Finished difference Result 167 states and 305 transitions. [2021-02-19 20:07:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:07:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 19 [2021-02-19 20:07:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:27,930 INFO L225 Difference]: With dead ends: 167 [2021-02-19 20:07:27,934 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 20:07:27,935 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:07:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 20:07:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 95. [2021-02-19 20:07:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 183 transitions. [2021-02-19 20:07:27,950 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 183 transitions. Word has length 19 [2021-02-19 20:07:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:27,950 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 183 transitions. [2021-02-19 20:07:27,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-02-19 20:07:27,950 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 183 transitions. [2021-02-19 20:07:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:07:27,951 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:27,951 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:28,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:28,166 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:28,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1822304704, now seen corresponding path program 3 times [2021-02-19 20:07:28,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:28,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009299016] [2021-02-19 20:07:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:28,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009299016] [2021-02-19 20:07:28,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724932176] [2021-02-19 20:07:28,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:28,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:07:28,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:28,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:07:28,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:28,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:28,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-02-19 20:07:28,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127205761] [2021-02-19 20:07:28,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:07:28,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:07:28,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:07:28,492 INFO L87 Difference]: Start difference. First operand 95 states and 183 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-02-19 20:07:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:28,757 INFO L93 Difference]: Finished difference Result 141 states and 262 transitions. [2021-02-19 20:07:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:07:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 19 [2021-02-19 20:07:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:28,758 INFO L225 Difference]: With dead ends: 141 [2021-02-19 20:07:28,758 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 20:07:28,759 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:07:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 20:07:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-02-19 20:07:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 170 transitions. [2021-02-19 20:07:28,762 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 170 transitions. Word has length 19 [2021-02-19 20:07:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:28,762 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 170 transitions. [2021-02-19 20:07:28,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-02-19 20:07:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 170 transitions. [2021-02-19 20:07:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 20:07:28,763 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:28,763 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:28,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:28,980 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1142032855, now seen corresponding path program 1 times [2021-02-19 20:07:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:28,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613189901] [2021-02-19 20:07:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613189901] [2021-02-19 20:07:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82266463] [2021-02-19 20:07:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 20:07:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 20:07:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:29,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:29,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:29,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:29,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:07:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:29,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:29,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 20:07:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250777204] [2021-02-19 20:07:29,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:07:29,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:07:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:07:29,155 INFO L87 Difference]: Start difference. First operand 89 states and 170 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2021-02-19 20:07:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:29,238 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-02-19 20:07:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:07:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 22 [2021-02-19 20:07:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:29,242 INFO L225 Difference]: With dead ends: 124 [2021-02-19 20:07:29,242 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 20:07:29,243 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:07:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 20:07:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2021-02-19 20:07:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9482758620689655) internal successors, (226), 116 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 226 transitions. [2021-02-19 20:07:29,258 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 226 transitions. Word has length 22 [2021-02-19 20:07:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:29,259 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 226 transitions. [2021-02-19 20:07:29,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2021-02-19 20:07:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 226 transitions. [2021-02-19 20:07:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:29,264 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:29,265 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:29,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:29,478 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash 574394740, now seen corresponding path program 2 times [2021-02-19 20:07:29,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:29,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877661669] [2021-02-19 20:07:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:29,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877661669] [2021-02-19 20:07:29,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225173665] [2021-02-19 20:07:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:29,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:29,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:29,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:29,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:29,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:29,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:29,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:07:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:29,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:29,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-02-19 20:07:29,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563433568] [2021-02-19 20:07:29,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 20:07:29,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 20:07:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:07:29,946 INFO L87 Difference]: Start difference. First operand 117 states and 226 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-02-19 20:07:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:30,479 INFO L93 Difference]: Finished difference Result 213 states and 403 transitions. [2021-02-19 20:07:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 20:07:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:07:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:30,481 INFO L225 Difference]: With dead ends: 213 [2021-02-19 20:07:30,481 INFO L226 Difference]: Without dead ends: 204 [2021-02-19 20:07:30,482 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:07:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-02-19 20:07:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 148. [2021-02-19 20:07:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.9251700680272108) internal successors, (283), 147 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 283 transitions. [2021-02-19 20:07:30,488 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 283 transitions. Word has length 26 [2021-02-19 20:07:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:30,488 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 283 transitions. [2021-02-19 20:07:30,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-02-19 20:07:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 283 transitions. [2021-02-19 20:07:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:30,489 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:30,489 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:30,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-02-19 20:07:30,694 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1107709774, now seen corresponding path program 3 times [2021-02-19 20:07:30,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:30,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828356315] [2021-02-19 20:07:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:30,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828356315] [2021-02-19 20:07:30,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983350189] [2021-02-19 20:07:30,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:30,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:07:30,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:30,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:31,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:31,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:31,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:31,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:31,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:07:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:31,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:31,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 20:07:31,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244515880] [2021-02-19 20:07:31,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 20:07:31,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 20:07:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:07:31,221 INFO L87 Difference]: Start difference. First operand 148 states and 283 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) [2021-02-19 20:07:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:31,841 INFO L93 Difference]: Finished difference Result 249 states and 472 transitions. [2021-02-19 20:07:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:07:31,841 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 26 [2021-02-19 20:07:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:31,842 INFO L225 Difference]: With dead ends: 249 [2021-02-19 20:07:31,842 INFO L226 Difference]: Without dead ends: 240 [2021-02-19 20:07:31,843 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:07:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-02-19 20:07:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2021-02-19 20:07:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.9477124183006536) internal successors, (298), 153 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 298 transitions. [2021-02-19 20:07:31,848 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 298 transitions. Word has length 26 [2021-02-19 20:07:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:31,848 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 298 transitions. [2021-02-19 20:07:31,848 INFO L481 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) [2021-02-19 20:07:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 298 transitions. [2021-02-19 20:07:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:31,849 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:31,849 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:32,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:32,050 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1200262004, now seen corresponding path program 4 times [2021-02-19 20:07:32,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:32,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212303361] [2021-02-19 20:07:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:32,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212303361] [2021-02-19 20:07:32,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188768537] [2021-02-19 20:07:32,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:32,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:07:32,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:32,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:32,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:32,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:32,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:32,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:32,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:07:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:32,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:32,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 20:07:32,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918525512] [2021-02-19 20:07:32,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 20:07:32,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:32,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 20:07:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:07:32,498 INFO L87 Difference]: Start difference. First operand 154 states and 298 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) [2021-02-19 20:07:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:33,133 INFO L93 Difference]: Finished difference Result 283 states and 535 transitions. [2021-02-19 20:07:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:07:33,134 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 26 [2021-02-19 20:07:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:33,135 INFO L225 Difference]: With dead ends: 283 [2021-02-19 20:07:33,135 INFO L226 Difference]: Without dead ends: 274 [2021-02-19 20:07:33,136 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:07:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-02-19 20:07:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 155. [2021-02-19 20:07:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9545454545454546) internal successors, (301), 154 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) [2021-02-19 20:07:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 301 transitions. [2021-02-19 20:07:33,142 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 301 transitions. Word has length 26 [2021-02-19 20:07:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:33,142 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 301 transitions. [2021-02-19 20:07:33,142 INFO L481 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) [2021-02-19 20:07:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 301 transitions. [2021-02-19 20:07:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:33,143 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:33,143 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:33,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:33,358 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1668462926, now seen corresponding path program 5 times [2021-02-19 20:07:33,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:33,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661957196] [2021-02-19 20:07:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:33,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661957196] [2021-02-19 20:07:33,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13037593] [2021-02-19 20:07:33,522 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 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 [2021-02-19 20:07:33,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:33,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:33,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 20:07:33,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:33,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:33,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:33,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-02-19 20:07:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:33,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:33,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 20:07:33,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139968227] [2021-02-19 20:07:33,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 20:07:33,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:33,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 20:07:33,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:07:33,795 INFO L87 Difference]: Start difference. First operand 155 states and 301 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) [2021-02-19 20:07:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:34,530 INFO L93 Difference]: Finished difference Result 312 states and 596 transitions. [2021-02-19 20:07:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 20:07:34,530 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 26 [2021-02-19 20:07:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:34,532 INFO L225 Difference]: With dead ends: 312 [2021-02-19 20:07:34,532 INFO L226 Difference]: Without dead ends: 303 [2021-02-19 20:07:34,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 20:07:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-19 20:07:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 160. [2021-02-19 20:07:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9811320754716981) internal successors, (315), 159 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 315 transitions. [2021-02-19 20:07:34,538 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 315 transitions. Word has length 26 [2021-02-19 20:07:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:34,539 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 315 transitions. [2021-02-19 20:07:34,539 INFO L481 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) [2021-02-19 20:07:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 315 transitions. [2021-02-19 20:07:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:34,539 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:34,539 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:34,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-02-19 20:07:34,759 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:34,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1641410482, now seen corresponding path program 6 times [2021-02-19 20:07:34,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:34,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387267072] [2021-02-19 20:07:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:34,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387267072] [2021-02-19 20:07:34,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:07:34,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:07:34,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048623324] [2021-02-19 20:07:34,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:07:34,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:07:34,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:07:34,804 INFO L87 Difference]: Start difference. First operand 160 states and 315 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-02-19 20:07:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:34,815 INFO L93 Difference]: Finished difference Result 319 states and 616 transitions. [2021-02-19 20:07:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:07:34,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:07:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:34,818 INFO L225 Difference]: With dead ends: 319 [2021-02-19 20:07:34,818 INFO L226 Difference]: Without dead ends: 291 [2021-02-19 20:07:34,819 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:07:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-02-19 20:07:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2021-02-19 20:07:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2021-02-19 20:07:34,827 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2021-02-19 20:07:34,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:34,827 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2021-02-19 20:07:34,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-02-19 20:07:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2021-02-19 20:07:34,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:34,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:34,828 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:34,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 20:07:34,828 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1817617144, now seen corresponding path program 7 times [2021-02-19 20:07:34,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:34,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401217918] [2021-02-19 20:07:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:35,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401217918] [2021-02-19 20:07:35,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504449472] [2021-02-19 20:07:35,009 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 [2021-02-19 20:07:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:35,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:35,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:35,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:35,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:35,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 20:07:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:35,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:35,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:35,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990397275] [2021-02-19 20:07:35,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:35,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:35,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:35,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:35,270 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:35,766 INFO L93 Difference]: Finished difference Result 321 states and 632 transitions. [2021-02-19 20:07:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:07:35,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:07:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:35,768 INFO L225 Difference]: With dead ends: 321 [2021-02-19 20:07:35,768 INFO L226 Difference]: Without dead ends: 293 [2021-02-19 20:07:35,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:07:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-02-19 20:07:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-02-19 20:07:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2021-02-19 20:07:35,779 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2021-02-19 20:07:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:35,779 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2021-02-19 20:07:35,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2021-02-19 20:07:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:35,783 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:35,783 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:35,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:35,994 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:35,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2050681226, now seen corresponding path program 8 times [2021-02-19 20:07:35,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:35,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492235224] [2021-02-19 20:07:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:36,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492235224] [2021-02-19 20:07:36,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604403455] [2021-02-19 20:07:36,158 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) [2021-02-19 20:07:36,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:36,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:36,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 20:07:36,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:36,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:36,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:36,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-02-19 20:07:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:36,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:36,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:36,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104763552] [2021-02-19 20:07:36,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:36,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:36,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:36,416 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:36,898 INFO L93 Difference]: Finished difference Result 349 states and 677 transitions. [2021-02-19 20:07:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 20:07:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:07:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:36,904 INFO L225 Difference]: With dead ends: 349 [2021-02-19 20:07:36,904 INFO L226 Difference]: Without dead ends: 317 [2021-02-19 20:07:36,905 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:07:36,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-02-19 20:07:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-02-19 20:07:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2021-02-19 20:07:36,911 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2021-02-19 20:07:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:36,912 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2021-02-19 20:07:36,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2021-02-19 20:07:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:36,913 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:36,913 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:37,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:37,122 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:37,122 INFO L82 PathProgramCache]: Analyzing trace with hash 257290552, now seen corresponding path program 9 times [2021-02-19 20:07:37,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:37,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986909239] [2021-02-19 20:07:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:37,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986909239] [2021-02-19 20:07:37,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511273334] [2021-02-19 20:07:37,263 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 [2021-02-19 20:07:37,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:07:37,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:37,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:37,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:37,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:37,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:37,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:07:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:37,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:37,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:37,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104426571] [2021-02-19 20:07:37,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:37,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:37,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:37,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:37,537 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:38,063 INFO L93 Difference]: Finished difference Result 386 states and 744 transitions. [2021-02-19 20:07:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 20:07:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:07:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:38,065 INFO L225 Difference]: With dead ends: 386 [2021-02-19 20:07:38,066 INFO L226 Difference]: Without dead ends: 354 [2021-02-19 20:07:38,066 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:07:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-02-19 20:07:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2021-02-19 20:07:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2021-02-19 20:07:38,074 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2021-02-19 20:07:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:38,074 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2021-02-19 20:07:38,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2021-02-19 20:07:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:38,076 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:38,076 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:38,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 20:07:38,290 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1683532918, now seen corresponding path program 10 times [2021-02-19 20:07:38,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:38,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033241648] [2021-02-19 20:07:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:38,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033241648] [2021-02-19 20:07:38,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647919406] [2021-02-19 20:07:38,427 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) [2021-02-19 20:07:38,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:07:38,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:38,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:38,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:38,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:38,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:38,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:07:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:38,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:38,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:38,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134580997] [2021-02-19 20:07:38,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:38,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:38,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:38,751 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:39,419 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-02-19 20:07:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 20:07:39,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:07:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:39,421 INFO L225 Difference]: With dead ends: 429 [2021-02-19 20:07:39,421 INFO L226 Difference]: Without dead ends: 397 [2021-02-19 20:07:39,422 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 20:07:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-02-19 20:07:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 267. [2021-02-19 20:07:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2021-02-19 20:07:39,433 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2021-02-19 20:07:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:39,433 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2021-02-19 20:07:39,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2021-02-19 20:07:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:39,434 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:39,434 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:39,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 20:07:39,642 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash 663083408, now seen corresponding path program 11 times [2021-02-19 20:07:39,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:39,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522878806] [2021-02-19 20:07:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:39,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522878806] [2021-02-19 20:07:39,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308070027] [2021-02-19 20:07:39,785 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 [2021-02-19 20:07:39,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:39,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:39,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:39,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 20:07:39,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:39,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:39,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:39,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-02-19 20:07:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:40,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:40,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:40,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930814950] [2021-02-19 20:07:40,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:40,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:40,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:40,055 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:40,586 INFO L93 Difference]: Finished difference Result 331 states and 650 transitions. [2021-02-19 20:07:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:07:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:07:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:40,590 INFO L225 Difference]: With dead ends: 331 [2021-02-19 20:07:40,590 INFO L226 Difference]: Without dead ends: 303 [2021-02-19 20:07:40,593 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:07:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-19 20:07:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2021-02-19 20:07:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2021-02-19 20:07:40,603 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2021-02-19 20:07:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:40,603 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2021-02-19 20:07:40,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 20:07:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2021-02-19 20:07:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:40,604 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:40,604 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:40,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 20:07:40,814 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1606122988, now seen corresponding path program 12 times [2021-02-19 20:07:40,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:40,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325355752] [2021-02-19 20:07:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:40,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325355752] [2021-02-19 20:07:40,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035895870] [2021-02-19 20:07:40,956 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 [2021-02-19 20:07:40,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:07:40,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:40,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:41,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:41,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:41,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:41,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:41,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:07:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:41,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:41,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:41,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180125653] [2021-02-19 20:07:41,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:41,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:41,187 INFO L87 Difference]: Start difference. First operand 263 states and 526 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) [2021-02-19 20:07:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:41,685 INFO L93 Difference]: Finished difference Result 355 states and 687 transitions. [2021-02-19 20:07:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 20:07:41,686 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 26 [2021-02-19 20:07:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:41,687 INFO L225 Difference]: With dead ends: 355 [2021-02-19 20:07:41,687 INFO L226 Difference]: Without dead ends: 323 [2021-02-19 20:07:41,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:07:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-02-19 20:07:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 275. [2021-02-19 20:07:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2021-02-19 20:07:41,694 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2021-02-19 20:07:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:41,695 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2021-02-19 20:07:41,695 INFO L481 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) [2021-02-19 20:07:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2021-02-19 20:07:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:41,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:41,695 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:41,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:41,907 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash -380872530, now seen corresponding path program 13 times [2021-02-19 20:07:41,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:41,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968924420] [2021-02-19 20:07:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:42,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968924420] [2021-02-19 20:07:42,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255080099] [2021-02-19 20:07:42,024 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 [2021-02-19 20:07:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:42,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:42,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:42,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:42,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:42,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:42,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:07:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:42,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:42,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:42,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676596322] [2021-02-19 20:07:42,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:42,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:42,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:42,250 INFO L87 Difference]: Start difference. First operand 275 states and 551 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) [2021-02-19 20:07:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:42,775 INFO L93 Difference]: Finished difference Result 392 states and 754 transitions. [2021-02-19 20:07:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 20:07:42,776 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 26 [2021-02-19 20:07:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:42,777 INFO L225 Difference]: With dead ends: 392 [2021-02-19 20:07:42,777 INFO L226 Difference]: Without dead ends: 360 [2021-02-19 20:07:42,778 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:07:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-02-19 20:07:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-02-19 20:07:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2021-02-19 20:07:42,786 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2021-02-19 20:07:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:42,787 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2021-02-19 20:07:42,787 INFO L481 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) [2021-02-19 20:07:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2021-02-19 20:07:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:42,787 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:42,787 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:42,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 20:07:42,998 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1045369836, now seen corresponding path program 14 times [2021-02-19 20:07:42,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:42,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512875472] [2021-02-19 20:07:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:43,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512875472] [2021-02-19 20:07:43,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107644568] [2021-02-19 20:07:43,131 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 [2021-02-19 20:07:43,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:43,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:43,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:43,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:43,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:43,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:43,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:07:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:43,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:43,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:43,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093716159] [2021-02-19 20:07:43,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:43,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:43,375 INFO L87 Difference]: Start difference. First operand 276 states and 553 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) [2021-02-19 20:07:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:44,056 INFO L93 Difference]: Finished difference Result 435 states and 838 transitions. [2021-02-19 20:07:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 20:07:44,056 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 26 [2021-02-19 20:07:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:44,057 INFO L225 Difference]: With dead ends: 435 [2021-02-19 20:07:44,057 INFO L226 Difference]: Without dead ends: 403 [2021-02-19 20:07:44,058 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 20:07:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-02-19 20:07:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2021-02-19 20:07:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2021-02-19 20:07:44,065 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2021-02-19 20:07:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:44,065 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2021-02-19 20:07:44,065 INFO L481 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) [2021-02-19 20:07:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2021-02-19 20:07:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:44,066 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:44,066 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:44,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 20:07:44,285 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash 24920326, now seen corresponding path program 15 times [2021-02-19 20:07:44,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:44,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158389648] [2021-02-19 20:07:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:44,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158389648] [2021-02-19 20:07:44,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198735651] [2021-02-19 20:07:44,441 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) [2021-02-19 20:07:44,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:07:44,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:44,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:44,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:44,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:44,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:44,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:44,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:44,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 20:07:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:44,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:44,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:44,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498739755] [2021-02-19 20:07:44,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:44,695 INFO L87 Difference]: Start difference. First operand 273 states and 544 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) [2021-02-19 20:07:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:45,162 INFO L93 Difference]: Finished difference Result 337 states and 660 transitions. [2021-02-19 20:07:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:07:45,162 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 26 [2021-02-19 20:07:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:45,163 INFO L225 Difference]: With dead ends: 337 [2021-02-19 20:07:45,163 INFO L226 Difference]: Without dead ends: 309 [2021-02-19 20:07:45,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:07:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-02-19 20:07:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 266. [2021-02-19 20:07:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2021-02-19 20:07:45,170 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2021-02-19 20:07:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:45,171 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2021-02-19 20:07:45,171 INFO L481 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) [2021-02-19 20:07:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2021-02-19 20:07:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:45,171 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:45,171 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:45,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:45,382 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:45,382 INFO L82 PathProgramCache]: Analyzing trace with hash 973986166, now seen corresponding path program 16 times [2021-02-19 20:07:45,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:45,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322946605] [2021-02-19 20:07:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:45,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322946605] [2021-02-19 20:07:45,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230805865] [2021-02-19 20:07:45,513 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) [2021-02-19 20:07:45,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:07:45,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:45,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:45,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 20:07:45,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:45,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:45,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:45,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-02-19 20:07:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:45,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:45,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:45,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643757866] [2021-02-19 20:07:45,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:45,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:45,762 INFO L87 Difference]: Start difference. First operand 266 states and 531 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) [2021-02-19 20:07:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:46,304 INFO L93 Difference]: Finished difference Result 343 states and 661 transitions. [2021-02-19 20:07:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 20:07:46,305 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 26 [2021-02-19 20:07:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:46,307 INFO L225 Difference]: With dead ends: 343 [2021-02-19 20:07:46,307 INFO L226 Difference]: Without dead ends: 311 [2021-02-19 20:07:46,307 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:07:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-02-19 20:07:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2021-02-19 20:07:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2021-02-19 20:07:46,315 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2021-02-19 20:07:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:46,316 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2021-02-19 20:07:46,316 INFO L481 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) [2021-02-19 20:07:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2021-02-19 20:07:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:46,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:46,316 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:46,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:46,526 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:46,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1013009352, now seen corresponding path program 17 times [2021-02-19 20:07:46,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:46,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606666879] [2021-02-19 20:07:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:46,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606666879] [2021-02-19 20:07:46,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537228189] [2021-02-19 20:07:46,659 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 [2021-02-19 20:07:46,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:46,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:46,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:07:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:46,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:46,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:46,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:46,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:46,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 20:07:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:46,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:46,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:46,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144320298] [2021-02-19 20:07:46,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:46,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:46,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:46,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:46,918 INFO L87 Difference]: Start difference. First operand 263 states and 525 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) [2021-02-19 20:07:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:47,436 INFO L93 Difference]: Finished difference Result 378 states and 724 transitions. [2021-02-19 20:07:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 20:07:47,437 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 26 [2021-02-19 20:07:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:47,438 INFO L225 Difference]: With dead ends: 378 [2021-02-19 20:07:47,438 INFO L226 Difference]: Without dead ends: 346 [2021-02-19 20:07:47,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:07:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-02-19 20:07:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 264. [2021-02-19 20:07:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2021-02-19 20:07:47,445 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2021-02-19 20:07:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:47,445 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2021-02-19 20:07:47,445 INFO L481 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) [2021-02-19 20:07:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2021-02-19 20:07:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:47,454 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:47,454 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:47,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:47,672 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 413233014, now seen corresponding path program 18 times [2021-02-19 20:07:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:47,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478086092] [2021-02-19 20:07:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:47,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478086092] [2021-02-19 20:07:47,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931669267] [2021-02-19 20:07:47,819 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) [2021-02-19 20:07:47,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 20:07:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:47,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:47,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:47,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:47,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:47,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:47,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:47,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 20:07:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:48,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:48,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:48,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893926859] [2021-02-19 20:07:48,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:48,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:48,088 INFO L87 Difference]: Start difference. First operand 264 states and 527 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) [2021-02-19 20:07:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:48,719 INFO L93 Difference]: Finished difference Result 410 states and 786 transitions. [2021-02-19 20:07:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:07:48,719 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 26 [2021-02-19 20:07:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:48,721 INFO L225 Difference]: With dead ends: 410 [2021-02-19 20:07:48,721 INFO L226 Difference]: Without dead ends: 378 [2021-02-19 20:07:48,721 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:07:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-02-19 20:07:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-02-19 20:07:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2021-02-19 20:07:48,727 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2021-02-19 20:07:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:48,727 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2021-02-19 20:07:48,727 INFO L481 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) [2021-02-19 20:07:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2021-02-19 20:07:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:07:48,728 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:48,728 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:48,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 20:07:48,939 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash -607216496, now seen corresponding path program 19 times [2021-02-19 20:07:48,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:48,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985117457] [2021-02-19 20:07:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:49,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985117457] [2021-02-19 20:07:49,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858978170] [2021-02-19 20:07:49,074 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 [2021-02-19 20:07:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:49,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:07:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:49,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:49,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:49,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:49,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:49,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 20:07:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:49,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:49,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 20:07:49,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033304601] [2021-02-19 20:07:49,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:07:49,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:49,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:07:49,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:49,332 INFO L87 Difference]: Start difference. First operand 255 states and 506 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) [2021-02-19 20:07:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:49,864 INFO L93 Difference]: Finished difference Result 307 states and 598 transitions. [2021-02-19 20:07:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:07:49,865 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 26 [2021-02-19 20:07:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:49,866 INFO L225 Difference]: With dead ends: 307 [2021-02-19 20:07:49,866 INFO L226 Difference]: Without dead ends: 279 [2021-02-19 20:07:49,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:07:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-02-19 20:07:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-02-19 20:07:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2021-02-19 20:07:49,871 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2021-02-19 20:07:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:49,871 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2021-02-19 20:07:49,871 INFO L481 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) [2021-02-19 20:07:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2021-02-19 20:07:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 20:07:49,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:49,872 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:50,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 20:07:50,078 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:50,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1174048203, now seen corresponding path program 20 times [2021-02-19 20:07:50,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:50,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338791278] [2021-02-19 20:07:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:50,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338791278] [2021-02-19 20:07:50,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53004614] [2021-02-19 20:07:50,131 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 [2021-02-19 20:07:50,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:50,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:07:50,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:50,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:07:50,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:07:50,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:50,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:50,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:50,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-02-19 20:07:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:50,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:50,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 20:07:50,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210571425] [2021-02-19 20:07:50,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:07:50,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:07:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:07:50,328 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 20:07:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:50,593 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2021-02-19 20:07:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 20:07:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 20:07:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:50,594 INFO L225 Difference]: With dead ends: 362 [2021-02-19 20:07:50,594 INFO L226 Difference]: Without dead ends: 362 [2021-02-19 20:07:50,595 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:07:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-02-19 20:07:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-02-19 20:07:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2021-02-19 20:07:50,600 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2021-02-19 20:07:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:50,600 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2021-02-19 20:07:50,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 20:07:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2021-02-19 20:07:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 20:07:50,601 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:50,601 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:50,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:50,802 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1383072401, now seen corresponding path program 21 times [2021-02-19 20:07:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:50,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597755523] [2021-02-19 20:07:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:50,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597755523] [2021-02-19 20:07:50,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406457083] [2021-02-19 20:07:50,832 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 [2021-02-19 20:07:50,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:07:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 20:07:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:50,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:50,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 20:07:50,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336315111] [2021-02-19 20:07:50,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:07:50,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:50,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:07:50,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:07:50,898 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:50,912 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2021-02-19 20:07:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:07:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 20:07:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:50,914 INFO L225 Difference]: With dead ends: 534 [2021-02-19 20:07:50,914 INFO L226 Difference]: Without dead ends: 491 [2021-02-19 20:07:50,914 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:07:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-02-19 20:07:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2021-02-19 20:07:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2021-02-19 20:07:50,933 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2021-02-19 20:07:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:50,933 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2021-02-19 20:07:50,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2021-02-19 20:07:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:07:50,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:50,934 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:51,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 20:07:51,150 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash 865729384, now seen corresponding path program 22 times [2021-02-19 20:07:51,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:51,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41434024] [2021-02-19 20:07:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41434024] [2021-02-19 20:07:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487617677] [2021-02-19 20:07:51,439 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 [2021-02-19 20:07:51,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:07:51,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:07:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:51,667 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:07:51,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:07:51,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:51,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:51,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:51,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:07:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:51,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:51,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-02-19 20:07:51,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685795379] [2021-02-19 20:07:51,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 20:07:51,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 20:07:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-02-19 20:07:51,781 INFO L87 Difference]: Start difference. First operand 411 states and 846 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) [2021-02-19 20:07:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:52,574 INFO L93 Difference]: Finished difference Result 550 states and 1089 transitions. [2021-02-19 20:07:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:07:52,575 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 33 [2021-02-19 20:07:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:52,576 INFO L225 Difference]: With dead ends: 550 [2021-02-19 20:07:52,576 INFO L226 Difference]: Without dead ends: 502 [2021-02-19 20:07:52,577 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 20:07:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-02-19 20:07:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 428. [2021-02-19 20:07:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.0468384074941453) internal successors, (874), 427 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 874 transitions. [2021-02-19 20:07:52,588 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 874 transitions. Word has length 33 [2021-02-19 20:07:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:52,588 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 874 transitions. [2021-02-19 20:07:52,588 INFO L481 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) [2021-02-19 20:07:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 874 transitions. [2021-02-19 20:07:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:07:52,589 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:52,589 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:52,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:52,802 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1629047718, now seen corresponding path program 23 times [2021-02-19 20:07:52,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:52,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954888510] [2021-02-19 20:07:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:53,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954888510] [2021-02-19 20:07:53,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446944844] [2021-02-19 20:07:53,098 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 [2021-02-19 20:07:53,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:07:53,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:53,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:07:53,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:53,341 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:07:53,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:07:53,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:53,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:53,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:53,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:07:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:53,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:53,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 20:07:53,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725248363] [2021-02-19 20:07:53,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:07:53,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:53,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:07:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:07:53,473 INFO L87 Difference]: Start difference. First operand 428 states and 874 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:07:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:54,518 INFO L93 Difference]: Finished difference Result 574 states and 1136 transitions. [2021-02-19 20:07:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:07:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 20:07:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:54,520 INFO L225 Difference]: With dead ends: 574 [2021-02-19 20:07:54,521 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 20:07:54,521 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:07:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 20:07:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 434. [2021-02-19 20:07:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0531177829099305) internal successors, (889), 433 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 889 transitions. [2021-02-19 20:07:54,534 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 889 transitions. Word has length 33 [2021-02-19 20:07:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:54,534 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 889 transitions. [2021-02-19 20:07:54,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:07:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 889 transitions. [2021-02-19 20:07:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:07:54,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:54,536 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:54,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 20:07:54,750 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1386547864, now seen corresponding path program 24 times [2021-02-19 20:07:54,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:54,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692212533] [2021-02-19 20:07:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:55,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692212533] [2021-02-19 20:07:55,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118103044] [2021-02-19 20:07:55,007 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 [2021-02-19 20:07:55,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:07:55,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:55,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:07:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:55,259 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:07:55,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:07:55,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:55,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:55,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:55,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:07:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:55,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:55,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 20:07:55,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658845891] [2021-02-19 20:07:55,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:07:55,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:55,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:07:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:07:55,398 INFO L87 Difference]: Start difference. First operand 434 states and 889 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:07:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:56,579 INFO L93 Difference]: Finished difference Result 599 states and 1183 transitions. [2021-02-19 20:07:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:07:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 20:07:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:56,581 INFO L225 Difference]: With dead ends: 599 [2021-02-19 20:07:56,581 INFO L226 Difference]: Without dead ends: 551 [2021-02-19 20:07:56,582 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:07:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-02-19 20:07:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 435. [2021-02-19 20:07:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.052995391705069) internal successors, (891), 434 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 891 transitions. [2021-02-19 20:07:56,590 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 891 transitions. Word has length 33 [2021-02-19 20:07:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:56,590 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 891 transitions. [2021-02-19 20:07:56,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:07:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 891 transitions. [2021-02-19 20:07:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:07:56,591 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:56,591 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:56,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:56,810 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash -925274, now seen corresponding path program 25 times [2021-02-19 20:07:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:56,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908979071] [2021-02-19 20:07:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:57,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908979071] [2021-02-19 20:07:57,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168691449] [2021-02-19 20:07:57,079 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 [2021-02-19 20:07:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:07:57,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:57,329 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:07:57,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:07:57,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:57,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:57,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:57,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:07:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:57,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:57,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 20:07:57,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927042130] [2021-02-19 20:07:57,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:07:57,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:57,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:07:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:07:57,456 INFO L87 Difference]: Start difference. First operand 435 states and 891 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:07:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:58,630 INFO L93 Difference]: Finished difference Result 637 states and 1261 transitions. [2021-02-19 20:07:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 20:07:58,630 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 20:07:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:58,632 INFO L225 Difference]: With dead ends: 637 [2021-02-19 20:07:58,632 INFO L226 Difference]: Without dead ends: 589 [2021-02-19 20:07:58,633 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:07:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-02-19 20:07:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 439. [2021-02-19 20:07:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0525114155251143) internal successors, (899), 438 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 899 transitions. [2021-02-19 20:07:58,642 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 899 transitions. Word has length 33 [2021-02-19 20:07:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:58,642 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 899 transitions. [2021-02-19 20:07:58,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:07:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 899 transitions. [2021-02-19 20:07:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:07:58,643 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:58,643 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:58,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 20:07:58,863 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash -642035864, now seen corresponding path program 26 times [2021-02-19 20:07:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:58,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981957391] [2021-02-19 20:07:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:59,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981957391] [2021-02-19 20:07:59,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086403703] [2021-02-19 20:07:59,122 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) [2021-02-19 20:07:59,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:07:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:59,343 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:07:59,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:07:59,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:59,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:59,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:59,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:07:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:59,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:59,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 20:07:59,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265075172] [2021-02-19 20:07:59,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:07:59,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:07:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:07:59,491 INFO L87 Difference]: Start difference. First operand 439 states and 899 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:08:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:00,867 INFO L93 Difference]: Finished difference Result 678 states and 1346 transitions. [2021-02-19 20:08:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:08:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 20:08:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:00,870 INFO L225 Difference]: With dead ends: 678 [2021-02-19 20:08:00,870 INFO L226 Difference]: Without dead ends: 646 [2021-02-19 20:08:00,871 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 20:08:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-02-19 20:08:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 440. [2021-02-19 20:08:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.052391799544419) internal successors, (901), 439 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 901 transitions. [2021-02-19 20:08:00,879 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 901 transitions. Word has length 33 [2021-02-19 20:08:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:00,879 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 901 transitions. [2021-02-19 20:08:00,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:08:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 901 transitions. [2021-02-19 20:08:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:00,880 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:00,880 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:01,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:01,095 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash 784206502, now seen corresponding path program 27 times [2021-02-19 20:08:01,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:01,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776593620] [2021-02-19 20:08:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:01,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776593620] [2021-02-19 20:08:01,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552388450] [2021-02-19 20:08:01,369 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 [2021-02-19 20:08:01,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:08:01,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:01,594 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:08:01,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:08:01,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:01,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:01,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:01,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:08:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:01,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:01,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 20:08:01,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662061741] [2021-02-19 20:08:01,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:08:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:01,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:08:01,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:08:01,756 INFO L87 Difference]: Start difference. First operand 440 states and 901 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:08:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:03,672 INFO L93 Difference]: Finished difference Result 758 states and 1504 transitions. [2021-02-19 20:08:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 20:08:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 20:08:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:03,674 INFO L225 Difference]: With dead ends: 758 [2021-02-19 20:08:03,674 INFO L226 Difference]: Without dead ends: 714 [2021-02-19 20:08:03,675 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=335, Invalid=3571, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:08:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-02-19 20:08:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 447. [2021-02-19 20:08:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.0493273542600896) internal successors, (914), 446 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 914 transitions. [2021-02-19 20:08:03,684 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 914 transitions. Word has length 33 [2021-02-19 20:08:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:03,684 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 914 transitions. [2021-02-19 20:08:03,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 20:08:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 914 transitions. [2021-02-19 20:08:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:03,685 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:03,685 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:03,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 20:08:03,902 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:03,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1817915618, now seen corresponding path program 28 times [2021-02-19 20:08:03,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:03,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609156084] [2021-02-19 20:08:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:04,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609156084] [2021-02-19 20:08:04,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103474806] [2021-02-19 20:08:04,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:08:04,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:08:04,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:04,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:04,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:04,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:04,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:04,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:04,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:04,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:08:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:04,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:04,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:04,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689887020] [2021-02-19 20:08:04,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:04,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:04,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:04,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:04,657 INFO L87 Difference]: Start difference. First operand 447 states and 914 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:05,691 INFO L93 Difference]: Finished difference Result 566 states and 1143 transitions. [2021-02-19 20:08:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:08:05,692 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:05,694 INFO L225 Difference]: With dead ends: 566 [2021-02-19 20:08:05,694 INFO L226 Difference]: Without dead ends: 538 [2021-02-19 20:08:05,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:08:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-02-19 20:08:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 450. [2021-02-19 20:08:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.046770601336303) internal successors, (919), 449 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 919 transitions. [2021-02-19 20:08:05,702 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 919 transitions. Word has length 33 [2021-02-19 20:08:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:05,702 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 919 transitions. [2021-02-19 20:08:05,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 919 transitions. [2021-02-19 20:08:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:05,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:05,703 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:05,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:05,914 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash -445370518, now seen corresponding path program 29 times [2021-02-19 20:08:05,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:05,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633855105] [2021-02-19 20:08:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633855105] [2021-02-19 20:08:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252428350] [2021-02-19 20:08:06,166 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 [2021-02-19 20:08:06,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:08:06,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:08:06,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:06,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:06,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:08:06,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:06,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:06,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:06,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 20:08:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:06,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:06,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311574024] [2021-02-19 20:08:06,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:06,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:06,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:06,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:06,692 INFO L87 Difference]: Start difference. First operand 450 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:07,759 INFO L93 Difference]: Finished difference Result 581 states and 1153 transitions. [2021-02-19 20:08:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:08:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:07,761 INFO L225 Difference]: With dead ends: 581 [2021-02-19 20:08:07,761 INFO L226 Difference]: Without dead ends: 533 [2021-02-19 20:08:07,762 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 20:08:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-02-19 20:08:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 459. [2021-02-19 20:08:07,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.052401746724891) internal successors, (940), 458 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 940 transitions. [2021-02-19 20:08:07,769 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 940 transitions. Word has length 33 [2021-02-19 20:08:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:07,769 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 940 transitions. [2021-02-19 20:08:07,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 940 transitions. [2021-02-19 20:08:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:07,770 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:07,770 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:07,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 20:08:07,978 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:07,978 INFO L82 PathProgramCache]: Analyzing trace with hash 834001196, now seen corresponding path program 30 times [2021-02-19 20:08:07,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:07,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719129472] [2021-02-19 20:08:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:08,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719129472] [2021-02-19 20:08:08,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882509034] [2021-02-19 20:08:08,254 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 [2021-02-19 20:08:08,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:08:08,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:08,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:08,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:08,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:08,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:08,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:08,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:08,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:08,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:08,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:08,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:08,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756379716] [2021-02-19 20:08:08,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:08,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:08,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:08,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:08,754 INFO L87 Difference]: Start difference. First operand 459 states and 940 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:09,970 INFO L93 Difference]: Finished difference Result 618 states and 1220 transitions. [2021-02-19 20:08:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:08:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:09,973 INFO L225 Difference]: With dead ends: 618 [2021-02-19 20:08:09,973 INFO L226 Difference]: Without dead ends: 570 [2021-02-19 20:08:09,973 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 20:08:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-02-19 20:08:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 460. [2021-02-19 20:08:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.052287581699346) internal successors, (942), 459 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 942 transitions. [2021-02-19 20:08:09,981 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 942 transitions. Word has length 33 [2021-02-19 20:08:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:09,981 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 942 transitions. [2021-02-19 20:08:09,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 942 transitions. [2021-02-19 20:08:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:09,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:09,982 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:10,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 20:08:10,190 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:10,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2075343510, now seen corresponding path program 31 times [2021-02-19 20:08:10,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:10,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047185804] [2021-02-19 20:08:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047185804] [2021-02-19 20:08:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799049667] [2021-02-19 20:08:10,474 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 [2021-02-19 20:08:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:10,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:10,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:10,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:10,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:10,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:10,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:10,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:10,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:10,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110746545] [2021-02-19 20:08:10,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:10,952 INFO L87 Difference]: Start difference. First operand 460 states and 942 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:12,151 INFO L93 Difference]: Finished difference Result 656 states and 1298 transitions. [2021-02-19 20:08:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:08:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:12,153 INFO L225 Difference]: With dead ends: 656 [2021-02-19 20:08:12,153 INFO L226 Difference]: Without dead ends: 608 [2021-02-19 20:08:12,154 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 20:08:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-02-19 20:08:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 464. [2021-02-19 20:08:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0518358531317493) internal successors, (950), 463 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 950 transitions. [2021-02-19 20:08:12,161 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 950 transitions. Word has length 33 [2021-02-19 20:08:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:12,162 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 950 transitions. [2021-02-19 20:08:12,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 950 transitions. [2021-02-19 20:08:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:12,163 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:12,163 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:12,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 20:08:12,368 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1578513196, now seen corresponding path program 32 times [2021-02-19 20:08:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:12,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461902655] [2021-02-19 20:08:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:12,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461902655] [2021-02-19 20:08:12,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292330614] [2021-02-19 20:08:12,642 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 [2021-02-19 20:08:12,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:08:12,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:12,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:12,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:12,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:12,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:12,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:12,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:12,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:12,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:12,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:13,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:13,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:13,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698554997] [2021-02-19 20:08:13,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:13,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:13,124 INFO L87 Difference]: Start difference. First operand 464 states and 950 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:14,501 INFO L93 Difference]: Finished difference Result 689 states and 1367 transitions. [2021-02-19 20:08:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 20:08:14,502 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:14,504 INFO L225 Difference]: With dead ends: 689 [2021-02-19 20:08:14,504 INFO L226 Difference]: Without dead ends: 657 [2021-02-19 20:08:14,504 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 20:08:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-02-19 20:08:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 465. [2021-02-19 20:08:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0517241379310347) internal successors, (952), 464 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 952 transitions. [2021-02-19 20:08:14,512 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 952 transitions. Word has length 33 [2021-02-19 20:08:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:14,512 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 952 transitions. [2021-02-19 20:08:14,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 952 transitions. [2021-02-19 20:08:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:14,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:14,513 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:14,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 20:08:14,720 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:14,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1290211734, now seen corresponding path program 33 times [2021-02-19 20:08:14,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:14,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212817813] [2021-02-19 20:08:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:14,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212817813] [2021-02-19 20:08:14,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035931893] [2021-02-19 20:08:14,989 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 [2021-02-19 20:08:15,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:08:15,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:15,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:15,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:15,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:15,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:15,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:15,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:15,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:15,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:15,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542231485] [2021-02-19 20:08:15,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:15,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:15,431 INFO L87 Difference]: Start difference. First operand 465 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:17,158 INFO L93 Difference]: Finished difference Result 757 states and 1498 transitions. [2021-02-19 20:08:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:08:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:17,161 INFO L225 Difference]: With dead ends: 757 [2021-02-19 20:08:17,161 INFO L226 Difference]: Without dead ends: 713 [2021-02-19 20:08:17,161 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 20:08:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-02-19 20:08:17,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 461. [2021-02-19 20:08:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.0456521739130435) internal successors, (941), 460 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 941 transitions. [2021-02-19 20:08:17,170 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 941 transitions. Word has length 33 [2021-02-19 20:08:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:17,170 INFO L480 AbstractCegarLoop]: Abstraction has 461 states and 941 transitions. [2021-02-19 20:08:17,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 941 transitions. [2021-02-19 20:08:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:17,171 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:17,171 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:17,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:17,386 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:17,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:17,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1927927446, now seen corresponding path program 34 times [2021-02-19 20:08:17,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:17,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48981550] [2021-02-19 20:08:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:17,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48981550] [2021-02-19 20:08:17,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675132996] [2021-02-19 20:08:17,674 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 [2021-02-19 20:08:17,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:08:17,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:17,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:17,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:17,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:17,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:17,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:17,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:17,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:08:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:18,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:18,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:18,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985947328] [2021-02-19 20:08:18,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:18,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:18,165 INFO L87 Difference]: Start difference. First operand 461 states and 941 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:19,256 INFO L93 Difference]: Finished difference Result 579 states and 1168 transitions. [2021-02-19 20:08:19,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:08:19,256 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:19,258 INFO L225 Difference]: With dead ends: 579 [2021-02-19 20:08:19,258 INFO L226 Difference]: Without dead ends: 551 [2021-02-19 20:08:19,258 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:08:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-02-19 20:08:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 453. [2021-02-19 20:08:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.0464601769911503) internal successors, (925), 452 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 925 transitions. [2021-02-19 20:08:19,266 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 925 transitions. Word has length 33 [2021-02-19 20:08:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:19,266 INFO L480 AbstractCegarLoop]: Abstraction has 453 states and 925 transitions. [2021-02-19 20:08:19,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 925 transitions. [2021-02-19 20:08:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:19,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:19,267 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:19,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-02-19 20:08:19,480 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 548696360, now seen corresponding path program 35 times [2021-02-19 20:08:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:19,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769006224] [2021-02-19 20:08:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:19,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769006224] [2021-02-19 20:08:19,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670499845] [2021-02-19 20:08:19,802 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 [2021-02-19 20:08:19,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:08:19,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:08:19,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:20,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:20,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:08:20,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:20,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:20,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:20,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 20:08:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:20,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:20,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:20,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633193751] [2021-02-19 20:08:20,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:20,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:20,278 INFO L87 Difference]: Start difference. First operand 453 states and 925 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:21,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:21,183 INFO L93 Difference]: Finished difference Result 557 states and 1118 transitions. [2021-02-19 20:08:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:08:21,183 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:21,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:21,185 INFO L225 Difference]: With dead ends: 557 [2021-02-19 20:08:21,185 INFO L226 Difference]: Without dead ends: 509 [2021-02-19 20:08:21,185 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 20:08:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-02-19 20:08:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 456. [2021-02-19 20:08:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.046153846153846) internal successors, (931), 455 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 931 transitions. [2021-02-19 20:08:21,192 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 931 transitions. Word has length 33 [2021-02-19 20:08:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:21,192 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 931 transitions. [2021-02-19 20:08:21,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 931 transitions. [2021-02-19 20:08:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:21,193 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:21,193 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:21,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 20:08:21,414 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1934318950, now seen corresponding path program 36 times [2021-02-19 20:08:21,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:21,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063103995] [2021-02-19 20:08:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:21,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063103995] [2021-02-19 20:08:21,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583234695] [2021-02-19 20:08:21,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:08:21,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:08:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:08:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:22,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:22,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:22,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:22,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:22,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:22,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:22,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:22,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:22,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330969534] [2021-02-19 20:08:22,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:22,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:22,141 INFO L87 Difference]: Start difference. First operand 456 states and 931 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:23,327 INFO L93 Difference]: Finished difference Result 562 states and 1131 transitions. [2021-02-19 20:08:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 20:08:23,327 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:23,329 INFO L225 Difference]: With dead ends: 562 [2021-02-19 20:08:23,329 INFO L226 Difference]: Without dead ends: 518 [2021-02-19 20:08:23,330 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 20:08:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-02-19 20:08:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 462. [2021-02-19 20:08:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0455531453362257) internal successors, (943), 461 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 943 transitions. [2021-02-19 20:08:23,336 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 943 transitions. Word has length 33 [2021-02-19 20:08:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:23,336 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 943 transitions. [2021-02-19 20:08:23,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 943 transitions. [2021-02-19 20:08:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:23,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:23,337 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:23,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:23,556 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:23,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1293208360, now seen corresponding path program 37 times [2021-02-19 20:08:23,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:23,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764195246] [2021-02-19 20:08:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:23,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764195246] [2021-02-19 20:08:23,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478461855] [2021-02-19 20:08:23,849 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 [2021-02-19 20:08:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:23,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:23,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:24,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:24,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:24,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:24,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:24,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:24,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:24,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:24,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668088937] [2021-02-19 20:08:24,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:24,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:24,277 INFO L87 Difference]: Start difference. First operand 462 states and 943 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:25,443 INFO L93 Difference]: Finished difference Result 596 states and 1202 transitions. [2021-02-19 20:08:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:08:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:25,445 INFO L225 Difference]: With dead ends: 596 [2021-02-19 20:08:25,445 INFO L226 Difference]: Without dead ends: 564 [2021-02-19 20:08:25,445 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 20:08:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-02-19 20:08:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2021-02-19 20:08:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0454545454545454) internal successors, (945), 462 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 945 transitions. [2021-02-19 20:08:25,452 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 945 transitions. Word has length 33 [2021-02-19 20:08:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:25,452 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 945 transitions. [2021-02-19 20:08:25,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 945 transitions. [2021-02-19 20:08:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:25,453 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:25,453 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:25,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 20:08:25,670 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516570, now seen corresponding path program 38 times [2021-02-19 20:08:25,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:25,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122284686] [2021-02-19 20:08:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:25,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122284686] [2021-02-19 20:08:25,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877928173] [2021-02-19 20:08:25,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:08:25,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:08:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:26,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:26,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:26,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:26,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:26,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:26,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:26,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:26,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072069676] [2021-02-19 20:08:26,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:26,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:26,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:26,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:26,377 INFO L87 Difference]: Start difference. First operand 463 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:28,222 INFO L93 Difference]: Finished difference Result 658 states and 1327 transitions. [2021-02-19 20:08:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:08:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:28,228 INFO L225 Difference]: With dead ends: 658 [2021-02-19 20:08:28,228 INFO L226 Difference]: Without dead ends: 610 [2021-02-19 20:08:28,228 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:08:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-02-19 20:08:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2021-02-19 20:08:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0431965442764577) internal successors, (946), 463 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 946 transitions. [2021-02-19 20:08:28,236 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 946 transitions. Word has length 33 [2021-02-19 20:08:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:28,236 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 946 transitions. [2021-02-19 20:08:28,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 946 transitions. [2021-02-19 20:08:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:28,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:28,237 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:28,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:28,450 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1804817980, now seen corresponding path program 39 times [2021-02-19 20:08:28,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:28,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882817414] [2021-02-19 20:08:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:28,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882817414] [2021-02-19 20:08:28,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559673236] [2021-02-19 20:08:28,705 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 [2021-02-19 20:08:28,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:08:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:28,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:28,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:28,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:28,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:28,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:28,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:08:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:29,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:29,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:29,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112661615] [2021-02-19 20:08:29,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:29,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:29,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:29,099 INFO L87 Difference]: Start difference. First operand 464 states and 946 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:30,317 INFO L93 Difference]: Finished difference Result 556 states and 1117 transitions. [2021-02-19 20:08:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:08:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:30,320 INFO L225 Difference]: With dead ends: 556 [2021-02-19 20:08:30,320 INFO L226 Difference]: Without dead ends: 528 [2021-02-19 20:08:30,320 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 20:08:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-02-19 20:08:30,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 459. [2021-02-19 20:08:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.0458515283842793) internal successors, (937), 458 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 937 transitions. [2021-02-19 20:08:30,333 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 937 transitions. Word has length 33 [2021-02-19 20:08:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:30,333 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 937 transitions. [2021-02-19 20:08:30,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 937 transitions. [2021-02-19 20:08:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:30,334 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:30,334 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:30,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 20:08:30,538 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash -680897506, now seen corresponding path program 40 times [2021-02-19 20:08:30,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:30,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615220216] [2021-02-19 20:08:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:30,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615220216] [2021-02-19 20:08:30,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188130967] [2021-02-19 20:08:30,813 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 [2021-02-19 20:08:30,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:08:30,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:31,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:31,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:31,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:31,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:31,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:31,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:31,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:31,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:31,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:31,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:31,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158656131] [2021-02-19 20:08:31,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:31,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:31,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:31,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:31,295 INFO L87 Difference]: Start difference. First operand 459 states and 937 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:32,471 INFO L93 Difference]: Finished difference Result 607 states and 1202 transitions. [2021-02-19 20:08:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:08:32,471 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:32,473 INFO L225 Difference]: With dead ends: 607 [2021-02-19 20:08:32,473 INFO L226 Difference]: Without dead ends: 559 [2021-02-19 20:08:32,473 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 20:08:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-02-19 20:08:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-02-19 20:08:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.051063829787234) internal successors, (964), 470 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 964 transitions. [2021-02-19 20:08:32,480 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 964 transitions. Word has length 33 [2021-02-19 20:08:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:32,480 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 964 transitions. [2021-02-19 20:08:32,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 964 transitions. [2021-02-19 20:08:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:32,481 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:32,481 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:32,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:32,691 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash 598474208, now seen corresponding path program 41 times [2021-02-19 20:08:32,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:32,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933397439] [2021-02-19 20:08:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:32,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933397439] [2021-02-19 20:08:32,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601747365] [2021-02-19 20:08:32,964 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 [2021-02-19 20:08:32,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:08:32,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:32,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:32,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:33,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:33,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:08:33,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:33,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:33,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:33,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 20:08:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:33,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:33,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-02-19 20:08:33,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153909612] [2021-02-19 20:08:33,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:08:33,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:33,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:08:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:08:33,526 INFO L87 Difference]: Start difference. First operand 471 states and 964 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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) [2021-02-19 20:08:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:34,849 INFO L93 Difference]: Finished difference Result 644 states and 1269 transitions. [2021-02-19 20:08:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:08:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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 33 [2021-02-19 20:08:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:34,851 INFO L225 Difference]: With dead ends: 644 [2021-02-19 20:08:34,851 INFO L226 Difference]: Without dead ends: 596 [2021-02-19 20:08:34,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:08:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-02-19 20:08:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 472. [2021-02-19 20:08:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.050955414012739) internal successors, (966), 471 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 966 transitions. [2021-02-19 20:08:34,856 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 966 transitions. Word has length 33 [2021-02-19 20:08:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:34,856 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 966 transitions. [2021-02-19 20:08:34,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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) [2021-02-19 20:08:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 966 transitions. [2021-02-19 20:08:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:34,857 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:34,857 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:35,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 20:08:35,057 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1984096798, now seen corresponding path program 42 times [2021-02-19 20:08:35,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:35,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546989821] [2021-02-19 20:08:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:35,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546989821] [2021-02-19 20:08:35,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909095623] [2021-02-19 20:08:35,297 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 [2021-02-19 20:08:35,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:08:35,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:35,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:35,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:35,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:35,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:35,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:35,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:35,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:35,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:35,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:35,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:35,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888488320] [2021-02-19 20:08:35,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:35,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:35,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:35,745 INFO L87 Difference]: Start difference. First operand 472 states and 966 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:37,035 INFO L93 Difference]: Finished difference Result 682 states and 1347 transitions. [2021-02-19 20:08:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:08:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:37,037 INFO L225 Difference]: With dead ends: 682 [2021-02-19 20:08:37,037 INFO L226 Difference]: Without dead ends: 634 [2021-02-19 20:08:37,037 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 20:08:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-02-19 20:08:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-02-19 20:08:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.0505263157894738) internal successors, (974), 475 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 974 transitions. [2021-02-19 20:08:37,042 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 974 transitions. Word has length 33 [2021-02-19 20:08:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:37,043 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 974 transitions. [2021-02-19 20:08:37,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 974 transitions. [2021-02-19 20:08:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:37,043 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:37,043 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:37,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 20:08:37,244 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1342986208, now seen corresponding path program 43 times [2021-02-19 20:08:37,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:37,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118109433] [2021-02-19 20:08:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:37,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118109433] [2021-02-19 20:08:37,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011651750] [2021-02-19 20:08:37,492 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 [2021-02-19 20:08:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:37,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:37,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:37,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:37,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:37,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:37,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:37,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:37,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:37,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:37,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062407661] [2021-02-19 20:08:37,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:37,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:37,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:37,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:37,916 INFO L87 Difference]: Start difference. First operand 476 states and 974 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:39,259 INFO L93 Difference]: Finished difference Result 715 states and 1416 transitions. [2021-02-19 20:08:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 20:08:39,259 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:39,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:39,261 INFO L225 Difference]: With dead ends: 715 [2021-02-19 20:08:39,261 INFO L226 Difference]: Without dead ends: 683 [2021-02-19 20:08:39,261 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 20:08:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-02-19 20:08:39,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 477. [2021-02-19 20:08:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.0504201680672267) internal successors, (976), 476 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 976 transitions. [2021-02-19 20:08:39,267 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 976 transitions. Word has length 33 [2021-02-19 20:08:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:39,267 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 976 transitions. [2021-02-19 20:08:39,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 976 transitions. [2021-02-19 20:08:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:39,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:39,267 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:39,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:39,482 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:39,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1525738722, now seen corresponding path program 44 times [2021-02-19 20:08:39,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:39,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121309274] [2021-02-19 20:08:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:39,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121309274] [2021-02-19 20:08:39,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530061569] [2021-02-19 20:08:39,739 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 [2021-02-19 20:08:39,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:08:39,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:39,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:39,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:39,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:39,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:39,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:39,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:39,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:39,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:40,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:40,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:40,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607023824] [2021-02-19 20:08:40,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:40,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:40,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:40,131 INFO L87 Difference]: Start difference. First operand 477 states and 976 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:41,851 INFO L93 Difference]: Finished difference Result 783 states and 1547 transitions. [2021-02-19 20:08:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:08:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:41,854 INFO L225 Difference]: With dead ends: 783 [2021-02-19 20:08:41,854 INFO L226 Difference]: Without dead ends: 739 [2021-02-19 20:08:41,854 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 20:08:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-02-19 20:08:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 473. [2021-02-19 20:08:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.044491525423729) internal successors, (965), 472 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 965 transitions. [2021-02-19 20:08:41,860 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 965 transitions. Word has length 33 [2021-02-19 20:08:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:41,860 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 965 transitions. [2021-02-19 20:08:41,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 965 transitions. [2021-02-19 20:08:41,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:41,861 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:41,861 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:42,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-02-19 20:08:42,061 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2131512862, now seen corresponding path program 45 times [2021-02-19 20:08:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:42,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112584865] [2021-02-19 20:08:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:42,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112584865] [2021-02-19 20:08:42,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536551543] [2021-02-19 20:08:42,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:08:42,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:08:42,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:42,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:42,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:42,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:42,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:42,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:42,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:42,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:08:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:42,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:42,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:42,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242578509] [2021-02-19 20:08:42,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:42,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:42,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:42,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:42,718 INFO L87 Difference]: Start difference. First operand 473 states and 965 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:43,813 INFO L93 Difference]: Finished difference Result 605 states and 1217 transitions. [2021-02-19 20:08:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:08:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:43,815 INFO L225 Difference]: With dead ends: 605 [2021-02-19 20:08:43,815 INFO L226 Difference]: Without dead ends: 577 [2021-02-19 20:08:43,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:08:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-02-19 20:08:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-02-19 20:08:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0452586206896552) internal successors, (949), 464 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 949 transitions. [2021-02-19 20:08:43,820 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 949 transitions. Word has length 33 [2021-02-19 20:08:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:43,821 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 949 transitions. [2021-02-19 20:08:43,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 949 transitions. [2021-02-19 20:08:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:43,821 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:43,821 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:44,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:44,022 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:44,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:44,022 INFO L82 PathProgramCache]: Analyzing trace with hash 313169372, now seen corresponding path program 46 times [2021-02-19 20:08:44,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:44,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434329602] [2021-02-19 20:08:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:44,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434329602] [2021-02-19 20:08:44,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729104609] [2021-02-19 20:08:44,286 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 [2021-02-19 20:08:44,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:08:44,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:44,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:44,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:44,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:44,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:44,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:44,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:44,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:44,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:44,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:44,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:44,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:44,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134023161] [2021-02-19 20:08:44,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:44,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:44,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:44,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:44,710 INFO L87 Difference]: Start difference. First operand 465 states and 949 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:45,531 INFO L93 Difference]: Finished difference Result 583 states and 1167 transitions. [2021-02-19 20:08:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:08:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:45,532 INFO L225 Difference]: With dead ends: 583 [2021-02-19 20:08:45,532 INFO L226 Difference]: Without dead ends: 535 [2021-02-19 20:08:45,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 20:08:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-02-19 20:08:45,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 468. [2021-02-19 20:08:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.044967880085653) internal successors, (955), 467 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 955 transitions. [2021-02-19 20:08:45,537 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 955 transitions. Word has length 33 [2021-02-19 20:08:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:45,537 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 955 transitions. [2021-02-19 20:08:45,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 955 transitions. [2021-02-19 20:08:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:45,538 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:45,538 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:45,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:45,752 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1698791962, now seen corresponding path program 47 times [2021-02-19 20:08:45,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:45,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279286170] [2021-02-19 20:08:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:46,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279286170] [2021-02-19 20:08:46,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267695870] [2021-02-19 20:08:46,038 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 [2021-02-19 20:08:46,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:08:46,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:46,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:08:46,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:46,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:46,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:08:46,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:46,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:46,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:46,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 20:08:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:46,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:46,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:46,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025266710] [2021-02-19 20:08:46,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:46,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:46,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:46,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:46,445 INFO L87 Difference]: Start difference. First operand 468 states and 955 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:48,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:48,016 INFO L93 Difference]: Finished difference Result 708 states and 1405 transitions. [2021-02-19 20:08:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:08:48,017 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:48,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:48,018 INFO L225 Difference]: With dead ends: 708 [2021-02-19 20:08:48,018 INFO L226 Difference]: Without dead ends: 613 [2021-02-19 20:08:48,018 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:08:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-02-19 20:08:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 483. [2021-02-19 20:08:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.045643153526971) internal successors, (986), 482 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 986 transitions. [2021-02-19 20:08:48,023 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 986 transitions. Word has length 33 [2021-02-19 20:08:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:48,023 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 986 transitions. [2021-02-19 20:08:48,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:48,023 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 986 transitions. [2021-02-19 20:08:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:48,024 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:48,024 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:48,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 20:08:48,226 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1057681372, now seen corresponding path program 48 times [2021-02-19 20:08:48,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:48,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967432938] [2021-02-19 20:08:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967432938] [2021-02-19 20:08:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398183024] [2021-02-19 20:08:48,501 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 [2021-02-19 20:08:48,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:08:48,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:48,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:48,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:48,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:48,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:48,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:48,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:48,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:48,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:48,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:48,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:48,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112578047] [2021-02-19 20:08:48,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:48,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:48,921 INFO L87 Difference]: Start difference. First operand 483 states and 986 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:50,505 INFO L93 Difference]: Finished difference Result 736 states and 1461 transitions. [2021-02-19 20:08:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 20:08:50,506 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:50,507 INFO L225 Difference]: With dead ends: 736 [2021-02-19 20:08:50,507 INFO L226 Difference]: Without dead ends: 668 [2021-02-19 20:08:50,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=414, Invalid=3368, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:08:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-02-19 20:08:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 484. [2021-02-19 20:08:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0455486542443064) internal successors, (988), 483 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 988 transitions. [2021-02-19 20:08:50,512 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 988 transitions. Word has length 33 [2021-02-19 20:08:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:50,512 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 988 transitions. [2021-02-19 20:08:50,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 988 transitions. [2021-02-19 20:08:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:50,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:50,513 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:50,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:50,728 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1811043558, now seen corresponding path program 49 times [2021-02-19 20:08:50,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:50,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232936224] [2021-02-19 20:08:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:51,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232936224] [2021-02-19 20:08:51,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880469769] [2021-02-19 20:08:51,014 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 [2021-02-19 20:08:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:51,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:51,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:51,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:51,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:51,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:51,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:51,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:51,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:51,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:51,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886090352] [2021-02-19 20:08:51,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:51,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:51,432 INFO L87 Difference]: Start difference. First operand 484 states and 988 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:53,680 INFO L93 Difference]: Finished difference Result 829 states and 1649 transitions. [2021-02-19 20:08:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 20:08:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:53,681 INFO L225 Difference]: With dead ends: 829 [2021-02-19 20:08:53,681 INFO L226 Difference]: Without dead ends: 753 [2021-02-19 20:08:53,682 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 20:08:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-02-19 20:08:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-02-19 20:08:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2021-02-19 20:08:53,687 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2021-02-19 20:08:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:53,687 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2021-02-19 20:08:53,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2021-02-19 20:08:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:53,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:53,688 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:53,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 20:08:53,890 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1569290992, now seen corresponding path program 50 times [2021-02-19 20:08:53,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:53,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655141855] [2021-02-19 20:08:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:54,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655141855] [2021-02-19 20:08:54,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603522334] [2021-02-19 20:08:54,176 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) [2021-02-19 20:08:54,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:08:54,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:54,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:54,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:54,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:54,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:54,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:54,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:54,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:08:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:54,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:54,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:54,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956585627] [2021-02-19 20:08:54,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:54,613 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:56,137 INFO L93 Difference]: Finished difference Result 652 states and 1298 transitions. [2021-02-19 20:08:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 20:08:56,138 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:56,139 INFO L225 Difference]: With dead ends: 652 [2021-02-19 20:08:56,139 INFO L226 Difference]: Without dead ends: 596 [2021-02-19 20:08:56,139 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=362, Invalid=3420, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:08:56,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-02-19 20:08:56,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 511. [2021-02-19 20:08:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.045098039215686) internal successors, (1043), 510 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1043 transitions. [2021-02-19 20:08:56,144 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1043 transitions. Word has length 33 [2021-02-19 20:08:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:56,144 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1043 transitions. [2021-02-19 20:08:56,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1043 transitions. [2021-02-19 20:08:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:56,145 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:56,145 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:56,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 20:08:56,345 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash -14145522, now seen corresponding path program 51 times [2021-02-19 20:08:56,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:56,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190080384] [2021-02-19 20:08:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:56,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190080384] [2021-02-19 20:08:56,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270614357] [2021-02-19 20:08:56,609 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 [2021-02-19 20:08:56,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:08:56,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:56,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:56,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:56,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:56,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:56,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:56,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:56,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:57,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:57,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:57,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496720802] [2021-02-19 20:08:57,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:57,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:57,038 INFO L87 Difference]: Start difference. First operand 511 states and 1043 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:58,026 INFO L93 Difference]: Finished difference Result 637 states and 1276 transitions. [2021-02-19 20:08:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 20:08:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:08:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:58,028 INFO L225 Difference]: With dead ends: 637 [2021-02-19 20:08:58,028 INFO L226 Difference]: Without dead ends: 589 [2021-02-19 20:08:58,028 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 20:08:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-02-19 20:08:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 515. [2021-02-19 20:08:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.044747081712062) internal successors, (1051), 514 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1051 transitions. [2021-02-19 20:08:58,033 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1051 transitions. Word has length 33 [2021-02-19 20:08:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:58,033 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1051 transitions. [2021-02-19 20:08:58,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:08:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1051 transitions. [2021-02-19 20:08:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:08:58,033 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:58,033 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:58,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 20:08:58,234 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:58,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1371477068, now seen corresponding path program 52 times [2021-02-19 20:08:58,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:58,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811812622] [2021-02-19 20:08:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:58,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811812622] [2021-02-19 20:08:58,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499366290] [2021-02-19 20:08:58,526 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) [2021-02-19 20:08:58,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:08:58,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:08:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:58,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:58,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:08:58,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:08:58,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:08:58,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:58,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:58,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:58,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:08:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:58,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:58,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:08:58,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039211986] [2021-02-19 20:08:58,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:08:58,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:58,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:08:58,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:08:58,956 INFO L87 Difference]: Start difference. First operand 515 states and 1051 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:00,575 INFO L93 Difference]: Finished difference Result 764 states and 1519 transitions. [2021-02-19 20:09:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:09:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:09:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:00,577 INFO L225 Difference]: With dead ends: 764 [2021-02-19 20:09:00,577 INFO L226 Difference]: Without dead ends: 669 [2021-02-19 20:09:00,577 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:09:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-02-19 20:09:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 531. [2021-02-19 20:09:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.047169811320755) internal successors, (1085), 530 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1085 transitions. [2021-02-19 20:09:00,582 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1085 transitions. Word has length 33 [2021-02-19 20:09:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:00,582 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1085 transitions. [2021-02-19 20:09:00,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1085 transitions. [2021-02-19 20:09:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:00,583 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:00,583 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:00,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 20:09:00,789 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash 730366478, now seen corresponding path program 53 times [2021-02-19 20:09:00,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:00,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960631209] [2021-02-19 20:09:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:01,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960631209] [2021-02-19 20:09:01,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961288544] [2021-02-19 20:09:01,069 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 [2021-02-19 20:09:01,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:09:01,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:01,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:01,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:01,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:01,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:01,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:01,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:01,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:01,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:01,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:01,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:09:01,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254299123] [2021-02-19 20:09:01,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:09:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:01,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:09:01,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:09:01,472 INFO L87 Difference]: Start difference. First operand 531 states and 1085 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:03,445 INFO L93 Difference]: Finished difference Result 788 states and 1566 transitions. [2021-02-19 20:09:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:09:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:09:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:03,446 INFO L225 Difference]: With dead ends: 788 [2021-02-19 20:09:03,446 INFO L226 Difference]: Without dead ends: 720 [2021-02-19 20:09:03,447 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:09:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-02-19 20:09:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 532. [2021-02-19 20:09:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0451977401129944) internal successors, (1086), 531 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1086 transitions. [2021-02-19 20:09:03,452 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1086 transitions. Word has length 33 [2021-02-19 20:09:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:03,452 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1086 transitions. [2021-02-19 20:09:03,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1086 transitions. [2021-02-19 20:09:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:03,453 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:03,453 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:03,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:03,667 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:03,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2138358452, now seen corresponding path program 54 times [2021-02-19 20:09:03,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:03,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382241281] [2021-02-19 20:09:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:03,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382241281] [2021-02-19 20:09:03,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822384813] [2021-02-19 20:09:03,951 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) [2021-02-19 20:09:03,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:09:03,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:03,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:09:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:04,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:04,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:04,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:04,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:04,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:04,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:04,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:04,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:04,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:04,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:09:04,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516276658] [2021-02-19 20:09:04,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:09:04,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:04,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:09:04,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:09:04,350 INFO L87 Difference]: Start difference. First operand 532 states and 1086 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:07,035 INFO L93 Difference]: Finished difference Result 888 states and 1768 transitions. [2021-02-19 20:09:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 20:09:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:09:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:07,037 INFO L225 Difference]: With dead ends: 888 [2021-02-19 20:09:07,037 INFO L226 Difference]: Without dead ends: 812 [2021-02-19 20:09:07,037 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=616, Invalid=5704, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 20:09:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-02-19 20:09:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 540. [2021-02-19 20:09:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.038961038961039) internal successors, (1099), 539 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1099 transitions. [2021-02-19 20:09:07,043 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1099 transitions. Word has length 33 [2021-02-19 20:09:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:07,043 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1099 transitions. [2021-02-19 20:09:07,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1099 transitions. [2021-02-19 20:09:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:07,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:07,044 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:07,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:07,244 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1241976098, now seen corresponding path program 55 times [2021-02-19 20:09:07,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:07,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854781682] [2021-02-19 20:09:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:07,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854781682] [2021-02-19 20:09:07,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709425600] [2021-02-19 20:09:07,515 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 [2021-02-19 20:09:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:07,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:07,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:07,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:07,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:07,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:07,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:09:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:07,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:07,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:09:07,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469097266] [2021-02-19 20:09:07,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:09:07,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:07,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:09:07,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:09:07,903 INFO L87 Difference]: Start difference. First operand 540 states and 1099 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:09,309 INFO L93 Difference]: Finished difference Result 715 states and 1420 transitions. [2021-02-19 20:09:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:09:09,310 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:09:09,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:09,311 INFO L225 Difference]: With dead ends: 715 [2021-02-19 20:09:09,311 INFO L226 Difference]: Without dead ends: 659 [2021-02-19 20:09:09,311 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 20:09:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-02-19 20:09:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 544. [2021-02-19 20:09:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.0386740331491713) internal successors, (1107), 543 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1107 transitions. [2021-02-19 20:09:09,316 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1107 transitions. Word has length 33 [2021-02-19 20:09:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:09,316 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 1107 transitions. [2021-02-19 20:09:09,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1107 transitions. [2021-02-19 20:09:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:09,317 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:09,317 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:09,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:09,517 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:09,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1245392376, now seen corresponding path program 56 times [2021-02-19 20:09:09,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:09,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618650959] [2021-02-19 20:09:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:09,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618650959] [2021-02-19 20:09:09,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948369211] [2021-02-19 20:09:09,843 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 [2021-02-19 20:09:09,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:09:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:09,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:10,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:10,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:10,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:10,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:10,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:10,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:10,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:10,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:09:10,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006668939] [2021-02-19 20:09:10,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:09:10,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:09:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:09:10,263 INFO L87 Difference]: Start difference. First operand 544 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:12,191 INFO L93 Difference]: Finished difference Result 766 states and 1515 transitions. [2021-02-19 20:09:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 20:09:12,192 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:09:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:12,193 INFO L225 Difference]: With dead ends: 766 [2021-02-19 20:09:12,193 INFO L226 Difference]: Without dead ends: 678 [2021-02-19 20:09:12,193 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:09:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-02-19 20:09:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 570. [2021-02-19 20:09:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.0369068541300526) internal successors, (1159), 569 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1159 transitions. [2021-02-19 20:09:12,198 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1159 transitions. Word has length 33 [2021-02-19 20:09:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:12,198 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1159 transitions. [2021-02-19 20:09:12,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1159 transitions. [2021-02-19 20:09:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:12,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:12,199 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:12,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-02-19 20:09:12,413 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:12,413 INFO L82 PathProgramCache]: Analyzing trace with hash 604281786, now seen corresponding path program 57 times [2021-02-19 20:09:12,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:12,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539046525] [2021-02-19 20:09:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:12,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539046525] [2021-02-19 20:09:12,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656766623] [2021-02-19 20:09:12,709 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 [2021-02-19 20:09:12,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:09:12,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:12,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:12,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:12,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:12,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:12,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:12,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:12,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:12,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:13,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:13,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:09:13,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406192075] [2021-02-19 20:09:13,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:09:13,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:13,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:09:13,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:09:13,109 INFO L87 Difference]: Start difference. First operand 570 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:14,998 INFO L93 Difference]: Finished difference Result 771 states and 1529 transitions. [2021-02-19 20:09:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:09:14,999 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:09:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:15,000 INFO L225 Difference]: With dead ends: 771 [2021-02-19 20:09:15,000 INFO L226 Difference]: Without dead ends: 707 [2021-02-19 20:09:15,000 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=431, Invalid=3991, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:09:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-02-19 20:09:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 571. [2021-02-19 20:09:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.0350877192982457) internal successors, (1160), 570 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1160 transitions. [2021-02-19 20:09:15,005 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1160 transitions. Word has length 33 [2021-02-19 20:09:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:15,005 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 1160 transitions. [2021-02-19 20:09:15,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1160 transitions. [2021-02-19 20:09:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:15,006 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:15,006 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:15,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:15,206 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2030524152, now seen corresponding path program 58 times [2021-02-19 20:09:15,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:15,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581234416] [2021-02-19 20:09:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:15,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581234416] [2021-02-19 20:09:15,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588889496] [2021-02-19 20:09:15,510 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 [2021-02-19 20:09:15,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:09:15,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:15,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:15,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:15,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:15,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:15,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:15,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:15,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:15,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:15,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:15,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:15,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:09:15,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673103487] [2021-02-19 20:09:15,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:09:15,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:09:15,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:09:15,903 INFO L87 Difference]: Start difference. First operand 571 states and 1160 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:18,277 INFO L93 Difference]: Finished difference Result 823 states and 1634 transitions. [2021-02-19 20:09:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 20:09:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:09:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:18,279 INFO L225 Difference]: With dead ends: 823 [2021-02-19 20:09:18,279 INFO L226 Difference]: Without dead ends: 767 [2021-02-19 20:09:18,280 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=521, Invalid=4881, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 20:09:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-02-19 20:09:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2021-02-19 20:09:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.030035335689046) internal successors, (1149), 566 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1149 transitions. [2021-02-19 20:09:18,285 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1149 transitions. Word has length 33 [2021-02-19 20:09:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:18,285 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1149 transitions. [2021-02-19 20:09:18,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1149 transitions. [2021-02-19 20:09:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:18,286 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:18,286 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:18,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 20:09:18,500 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:18,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1925677534, now seen corresponding path program 59 times [2021-02-19 20:09:18,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:18,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490291276] [2021-02-19 20:09:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:18,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490291276] [2021-02-19 20:09:18,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140168505] [2021-02-19 20:09:18,803 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 [2021-02-19 20:09:18,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:09:18,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:19,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:19,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:19,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:19,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:19,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:09:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:19,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:19,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 20:09:19,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999741157] [2021-02-19 20:09:19,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:09:19,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:09:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:09:19,213 INFO L87 Difference]: Start difference. First operand 567 states and 1149 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:20,846 INFO L93 Difference]: Finished difference Result 729 states and 1442 transitions. [2021-02-19 20:09:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 20:09:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 20:09:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:20,847 INFO L225 Difference]: With dead ends: 729 [2021-02-19 20:09:20,847 INFO L226 Difference]: Without dead ends: 673 [2021-02-19 20:09:20,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:09:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-02-19 20:09:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 573. [2021-02-19 20:09:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0262237762237763) internal successors, (1159), 572 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1159 transitions. [2021-02-19 20:09:20,852 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1159 transitions. Word has length 33 [2021-02-19 20:09:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:20,852 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1159 transitions. [2021-02-19 20:09:20,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 20:09:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1159 transitions. [2021-02-19 20:09:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:20,853 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:20,853 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:21,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:21,067 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1180290914, now seen corresponding path program 60 times [2021-02-19 20:09:21,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:21,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015555436] [2021-02-19 20:09:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:21,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015555436] [2021-02-19 20:09:21,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754570992] [2021-02-19 20:09:21,332 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 [2021-02-19 20:09:21,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:09:21,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:21,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:09:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:21,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:21,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:21,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:21,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:09:21,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:21,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:21,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:21,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 20:09:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:21,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:21,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:21,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329456699] [2021-02-19 20:09:21,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:21,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:21,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:21,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:21,810 INFO L87 Difference]: Start difference. First operand 573 states and 1159 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:22,732 INFO L93 Difference]: Finished difference Result 722 states and 1426 transitions. [2021-02-19 20:09:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:09:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:22,733 INFO L225 Difference]: With dead ends: 722 [2021-02-19 20:09:22,734 INFO L226 Difference]: Without dead ends: 674 [2021-02-19 20:09:22,734 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:09:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-02-19 20:09:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 588. [2021-02-19 20:09:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0306643952299828) internal successors, (1192), 587 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1192 transitions. [2021-02-19 20:09:22,739 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1192 transitions. Word has length 33 [2021-02-19 20:09:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:22,739 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1192 transitions. [2021-02-19 20:09:22,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1192 transitions. [2021-02-19 20:09:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:22,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:22,740 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:22,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 20:09:22,940 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1835304668, now seen corresponding path program 61 times [2021-02-19 20:09:22,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:22,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770683388] [2021-02-19 20:09:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:23,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770683388] [2021-02-19 20:09:23,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671443480] [2021-02-19 20:09:23,199 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 [2021-02-19 20:09:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:23,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:23,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:23,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:23,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:23,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:23,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:23,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:23,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:23,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:23,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818975025] [2021-02-19 20:09:23,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:23,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:23,679 INFO L87 Difference]: Start difference. First operand 588 states and 1192 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:24,761 INFO L93 Difference]: Finished difference Result 759 states and 1493 transitions. [2021-02-19 20:09:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:09:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:24,763 INFO L225 Difference]: With dead ends: 759 [2021-02-19 20:09:24,763 INFO L226 Difference]: Without dead ends: 711 [2021-02-19 20:09:24,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:09:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-02-19 20:09:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 589. [2021-02-19 20:09:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0306122448979593) internal successors, (1194), 588 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1194 transitions. [2021-02-19 20:09:24,768 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1194 transitions. Word has length 33 [2021-02-19 20:09:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:24,768 INFO L480 AbstractCegarLoop]: Abstraction has 589 states and 1194 transitions. [2021-02-19 20:09:24,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1194 transitions. [2021-02-19 20:09:24,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:24,769 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:24,769 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:24,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:24,970 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:24,970 INFO L82 PathProgramCache]: Analyzing trace with hash -449682078, now seen corresponding path program 62 times [2021-02-19 20:09:24,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:24,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351148931] [2021-02-19 20:09:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:25,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351148931] [2021-02-19 20:09:25,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915355016] [2021-02-19 20:09:25,243 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 [2021-02-19 20:09:25,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:09:25,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:25,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:25,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:25,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:25,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:25,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:25,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:25,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:25,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:25,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:25,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:25,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:25,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79246174] [2021-02-19 20:09:25,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:25,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:25,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:25,739 INFO L87 Difference]: Start difference. First operand 589 states and 1194 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:26,937 INFO L93 Difference]: Finished difference Result 797 states and 1571 transitions. [2021-02-19 20:09:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:09:26,938 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:26,939 INFO L225 Difference]: With dead ends: 797 [2021-02-19 20:09:26,939 INFO L226 Difference]: Without dead ends: 749 [2021-02-19 20:09:26,939 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:09:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-02-19 20:09:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 593. [2021-02-19 20:09:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.0304054054054053) internal successors, (1202), 592 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1202 transitions. [2021-02-19 20:09:26,944 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1202 transitions. Word has length 33 [2021-02-19 20:09:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:26,944 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1202 transitions. [2021-02-19 20:09:26,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1202 transitions. [2021-02-19 20:09:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:26,945 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:26,945 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:27,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 20:09:27,145 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1090792668, now seen corresponding path program 63 times [2021-02-19 20:09:27,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:27,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332234355] [2021-02-19 20:09:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:27,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332234355] [2021-02-19 20:09:27,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491499500] [2021-02-19 20:09:27,432 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 [2021-02-19 20:09:27,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:09:27,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:27,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:27,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:27,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:27,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:27,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:27,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:27,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:27,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:27,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:27,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:27,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549289735] [2021-02-19 20:09:27,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:27,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:27,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:27,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:27,903 INFO L87 Difference]: Start difference. First operand 593 states and 1202 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:29,401 INFO L93 Difference]: Finished difference Result 830 states and 1640 transitions. [2021-02-19 20:09:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 20:09:29,401 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:29,402 INFO L225 Difference]: With dead ends: 830 [2021-02-19 20:09:29,402 INFO L226 Difference]: Without dead ends: 798 [2021-02-19 20:09:29,402 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 20:09:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-02-19 20:09:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 594. [2021-02-19 20:09:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.03035413153457) internal successors, (1204), 593 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1204 transitions. [2021-02-19 20:09:29,408 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1204 transitions. Word has length 33 [2021-02-19 20:09:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:29,408 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 1204 transitions. [2021-02-19 20:09:29,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1204 transitions. [2021-02-19 20:09:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:29,409 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:29,409 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:29,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-02-19 20:09:29,623 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:29,624 INFO L82 PathProgramCache]: Analyzing trace with hash 335449698, now seen corresponding path program 64 times [2021-02-19 20:09:29,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:29,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110266980] [2021-02-19 20:09:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:29,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110266980] [2021-02-19 20:09:29,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153970756] [2021-02-19 20:09:29,888 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 [2021-02-19 20:09:29,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:09:29,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:30,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:30,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:30,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:30,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:30,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:30,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:30,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:30,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:30,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:30,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246063728] [2021-02-19 20:09:30,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:30,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:30,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:30,371 INFO L87 Difference]: Start difference. First operand 594 states and 1204 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:32,231 INFO L93 Difference]: Finished difference Result 897 states and 1769 transitions. [2021-02-19 20:09:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:09:32,231 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:32,232 INFO L225 Difference]: With dead ends: 897 [2021-02-19 20:09:32,233 INFO L226 Difference]: Without dead ends: 853 [2021-02-19 20:09:32,233 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:09:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-02-19 20:09:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 590. [2021-02-19 20:09:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.025466893039049) internal successors, (1193), 589 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1193 transitions. [2021-02-19 20:09:32,239 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1193 transitions. Word has length 33 [2021-02-19 20:09:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:32,239 INFO L480 AbstractCegarLoop]: Abstraction has 590 states and 1193 transitions. [2021-02-19 20:09:32,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1193 transitions. [2021-02-19 20:09:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:32,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:32,239 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:32,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:32,452 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash -302266014, now seen corresponding path program 65 times [2021-02-19 20:09:32,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:32,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195091497] [2021-02-19 20:09:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:32,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195091497] [2021-02-19 20:09:32,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874042421] [2021-02-19 20:09:32,719 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 [2021-02-19 20:09:32,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:09:32,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:32,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:32,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:32,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:32,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:32,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:32,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:32,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:32,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:32,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:09:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:33,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:33,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623768189] [2021-02-19 20:09:33,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:33,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:33,187 INFO L87 Difference]: Start difference. First operand 590 states and 1193 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:34,154 INFO L93 Difference]: Finished difference Result 720 states and 1441 transitions. [2021-02-19 20:09:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:09:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:34,156 INFO L225 Difference]: With dead ends: 720 [2021-02-19 20:09:34,156 INFO L226 Difference]: Without dead ends: 692 [2021-02-19 20:09:34,156 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 20:09:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-02-19 20:09:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 582. [2021-02-19 20:09:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.025817555938038) internal successors, (1177), 581 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1177 transitions. [2021-02-19 20:09:34,161 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1177 transitions. Word has length 33 [2021-02-19 20:09:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:34,161 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 1177 transitions. [2021-02-19 20:09:34,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1177 transitions. [2021-02-19 20:09:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:34,162 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:34,162 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:34,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:34,362 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:34,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2120609504, now seen corresponding path program 66 times [2021-02-19 20:09:34,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:34,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957960855] [2021-02-19 20:09:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:34,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957960855] [2021-02-19 20:09:34,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227124721] [2021-02-19 20:09:34,667 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) [2021-02-19 20:09:34,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:09:34,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:09:34,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:35,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:35,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:35,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:35,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:35,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:35,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:35,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:35,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:35,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:35,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222894836] [2021-02-19 20:09:35,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:35,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:35,164 INFO L87 Difference]: Start difference. First operand 582 states and 1177 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:36,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:36,429 INFO L93 Difference]: Finished difference Result 760 states and 1501 transitions. [2021-02-19 20:09:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 20:09:36,430 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:36,431 INFO L225 Difference]: With dead ends: 760 [2021-02-19 20:09:36,431 INFO L226 Difference]: Without dead ends: 664 [2021-02-19 20:09:36,431 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=277, Invalid=2915, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 20:09:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-02-19 20:09:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 596. [2021-02-19 20:09:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.030252100840336) internal successors, (1208), 595 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1208 transitions. [2021-02-19 20:09:36,436 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1208 transitions. Word has length 33 [2021-02-19 20:09:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:36,436 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 1208 transitions. [2021-02-19 20:09:36,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1208 transitions. [2021-02-19 20:09:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:36,437 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:36,437 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:36,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-02-19 20:09:36,637 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash -734986914, now seen corresponding path program 67 times [2021-02-19 20:09:36,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:36,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45825923] [2021-02-19 20:09:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:36,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45825923] [2021-02-19 20:09:36,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952143019] [2021-02-19 20:09:36,944 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 [2021-02-19 20:09:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:36,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:37,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:37,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:37,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:37,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:37,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:37,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:37,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:37,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:37,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736425068] [2021-02-19 20:09:37,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:37,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:37,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:37,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:37,438 INFO L87 Difference]: Start difference. First operand 596 states and 1208 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:39,202 INFO L93 Difference]: Finished difference Result 806 states and 1598 transitions. [2021-02-19 20:09:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:09:39,202 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:39,204 INFO L225 Difference]: With dead ends: 806 [2021-02-19 20:09:39,204 INFO L226 Difference]: Without dead ends: 711 [2021-02-19 20:09:39,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:09:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-02-19 20:09:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 599. [2021-02-19 20:09:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0250836120401337) internal successors, (1211), 598 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1211 transitions. [2021-02-19 20:09:39,210 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1211 transitions. Word has length 33 [2021-02-19 20:09:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:39,210 INFO L480 AbstractCegarLoop]: Abstraction has 599 states and 1211 transitions. [2021-02-19 20:09:39,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1211 transitions. [2021-02-19 20:09:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:39,211 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:39,211 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:39,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:39,426 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1376097504, now seen corresponding path program 68 times [2021-02-19 20:09:39,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:39,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824401006] [2021-02-19 20:09:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:39,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824401006] [2021-02-19 20:09:39,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549689211] [2021-02-19 20:09:39,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:09:39,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:09:39,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:39,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:40,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:40,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:40,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:40,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:40,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:40,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:40,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:40,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:40,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:40,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017587089] [2021-02-19 20:09:40,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:40,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:40,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:40,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:40,186 INFO L87 Difference]: Start difference. First operand 599 states and 1211 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:42,157 INFO L93 Difference]: Finished difference Result 830 states and 1647 transitions. [2021-02-19 20:09:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 20:09:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:42,159 INFO L225 Difference]: With dead ends: 830 [2021-02-19 20:09:42,159 INFO L226 Difference]: Without dead ends: 762 [2021-02-19 20:09:42,159 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:09:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-02-19 20:09:42,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 600. [2021-02-19 20:09:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.025041736227045) internal successors, (1213), 599 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1213 transitions. [2021-02-19 20:09:42,165 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1213 transitions. Word has length 33 [2021-02-19 20:09:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:42,165 INFO L480 AbstractCegarLoop]: Abstraction has 600 states and 1213 transitions. [2021-02-19 20:09:42,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:42,165 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1213 transitions. [2021-02-19 20:09:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:42,165 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:42,165 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:42,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-02-19 20:09:42,366 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:42,366 INFO L82 PathProgramCache]: Analyzing trace with hash 50144862, now seen corresponding path program 69 times [2021-02-19 20:09:42,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:42,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821705840] [2021-02-19 20:09:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:42,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821705840] [2021-02-19 20:09:42,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537648222] [2021-02-19 20:09:42,641 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 [2021-02-19 20:09:42,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:09:42,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:42,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:42,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:42,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:42,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:42,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:42,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:42,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:42,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:43,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:43,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:43,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208790504] [2021-02-19 20:09:43,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:43,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:43,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:43,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:43,124 INFO L87 Difference]: Start difference. First operand 600 states and 1213 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:45,540 INFO L93 Difference]: Finished difference Result 939 states and 1863 transitions. [2021-02-19 20:09:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 20:09:45,540 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:45,541 INFO L225 Difference]: With dead ends: 939 [2021-02-19 20:09:45,541 INFO L226 Difference]: Without dead ends: 863 [2021-02-19 20:09:45,542 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=540, Invalid=4862, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 20:09:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-02-19 20:09:45,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 602. [2021-02-19 20:09:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.0232945091514143) internal successors, (1216), 601 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1216 transitions. [2021-02-19 20:09:45,548 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1216 transitions. Word has length 33 [2021-02-19 20:09:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:45,548 INFO L480 AbstractCegarLoop]: Abstraction has 602 states and 1216 transitions. [2021-02-19 20:09:45,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1216 transitions. [2021-02-19 20:09:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:45,548 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:45,548 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:45,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:45,763 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash -864487884, now seen corresponding path program 70 times [2021-02-19 20:09:45,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:45,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463401178] [2021-02-19 20:09:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:46,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463401178] [2021-02-19 20:09:46,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699831775] [2021-02-19 20:09:46,055 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 [2021-02-19 20:09:46,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:09:46,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:46,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:46,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:46,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:46,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:46,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:46,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:09:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:46,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:46,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:46,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207724583] [2021-02-19 20:09:46,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:46,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:46,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:46,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:46,560 INFO L87 Difference]: Start difference. First operand 602 states and 1216 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:48,090 INFO L93 Difference]: Finished difference Result 762 states and 1508 transitions. [2021-02-19 20:09:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 20:09:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:48,091 INFO L225 Difference]: With dead ends: 762 [2021-02-19 20:09:48,091 INFO L226 Difference]: Without dead ends: 706 [2021-02-19 20:09:48,091 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:09:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-02-19 20:09:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 595. [2021-02-19 20:09:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.025252525252525) internal successors, (1203), 594 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1203 transitions. [2021-02-19 20:09:48,096 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1203 transitions. Word has length 33 [2021-02-19 20:09:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:48,096 INFO L480 AbstractCegarLoop]: Abstraction has 595 states and 1203 transitions. [2021-02-19 20:09:48,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1203 transitions. [2021-02-19 20:09:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:48,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:48,097 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:48,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-02-19 20:09:48,298 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:48,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1847042898, now seen corresponding path program 71 times [2021-02-19 20:09:48,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:48,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060759172] [2021-02-19 20:09:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:48,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060759172] [2021-02-19 20:09:48,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584640480] [2021-02-19 20:09:48,597 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 [2021-02-19 20:09:48,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:09:48,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:48,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:48,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:48,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:48,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:48,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:48,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:48,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:48,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:49,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:49,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580955027] [2021-02-19 20:09:49,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:49,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:49,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:49,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:49,102 INFO L87 Difference]: Start difference. First operand 595 states and 1203 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:50,542 INFO L93 Difference]: Finished difference Result 781 states and 1543 transitions. [2021-02-19 20:09:50,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 20:09:50,543 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:50,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:50,543 INFO L225 Difference]: With dead ends: 781 [2021-02-19 20:09:50,543 INFO L226 Difference]: Without dead ends: 685 [2021-02-19 20:09:50,544 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 20:09:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-02-19 20:09:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 606. [2021-02-19 20:09:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.031404958677686) internal successors, (1229), 605 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1229 transitions. [2021-02-19 20:09:50,549 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1229 transitions. Word has length 33 [2021-02-19 20:09:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:50,549 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1229 transitions. [2021-02-19 20:09:50,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1229 transitions. [2021-02-19 20:09:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:50,550 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:50,550 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:50,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:50,750 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1062301808, now seen corresponding path program 72 times [2021-02-19 20:09:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:50,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403952576] [2021-02-19 20:09:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:51,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403952576] [2021-02-19 20:09:51,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868503457] [2021-02-19 20:09:51,096 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 [2021-02-19 20:09:51,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:09:51,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:51,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:09:51,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:51,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:51,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:51,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:51,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:51,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:51,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:51,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:51,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:51,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:51,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:51,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152895345] [2021-02-19 20:09:51,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:51,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:51,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:51,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:51,595 INFO L87 Difference]: Start difference. First operand 606 states and 1229 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:53,798 INFO L93 Difference]: Finished difference Result 862 states and 1713 transitions. [2021-02-19 20:09:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 20:09:53,799 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:53,800 INFO L225 Difference]: With dead ends: 862 [2021-02-19 20:09:53,800 INFO L226 Difference]: Without dead ends: 760 [2021-02-19 20:09:53,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:09:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-02-19 20:09:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 622. [2021-02-19 20:09:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.028985507246377) internal successors, (1260), 621 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1260 transitions. [2021-02-19 20:09:53,805 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1260 transitions. Word has length 33 [2021-02-19 20:09:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:53,806 INFO L480 AbstractCegarLoop]: Abstraction has 622 states and 1260 transitions. [2021-02-19 20:09:53,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1260 transitions. [2021-02-19 20:09:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:53,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:53,806 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:54,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 20:09:54,007 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:54,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1703412398, now seen corresponding path program 73 times [2021-02-19 20:09:54,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:54,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667388271] [2021-02-19 20:09:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:54,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667388271] [2021-02-19 20:09:54,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239985838] [2021-02-19 20:09:54,298 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 [2021-02-19 20:09:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:54,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:54,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:54,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:54,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:54,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:54,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:54,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:54,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:54,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:54,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081847291] [2021-02-19 20:09:54,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:54,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:54,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:54,805 INFO L87 Difference]: Start difference. First operand 622 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:09:57,668 INFO L93 Difference]: Finished difference Result 971 states and 1938 transitions. [2021-02-19 20:09:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 20:09:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:09:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:09:57,670 INFO L225 Difference]: With dead ends: 971 [2021-02-19 20:09:57,670 INFO L226 Difference]: Without dead ends: 884 [2021-02-19 20:09:57,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=669, Invalid=6137, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:09:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-02-19 20:09:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 643. [2021-02-19 20:09:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.0373831775700935) internal successors, (1308), 642 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:09:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1308 transitions. [2021-02-19 20:09:57,676 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1308 transitions. Word has length 33 [2021-02-19 20:09:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:09:57,676 INFO L480 AbstractCegarLoop]: Abstraction has 643 states and 1308 transitions. [2021-02-19 20:09:57,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:09:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1308 transitions. [2021-02-19 20:09:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:09:57,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:09:57,677 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:09:57,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:09:57,878 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:09:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:09:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash -277170032, now seen corresponding path program 74 times [2021-02-19 20:09:57,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:09:57,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030001063] [2021-02-19 20:09:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:09:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:09:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:58,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030001063] [2021-02-19 20:09:58,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106662560] [2021-02-19 20:09:58,190 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 [2021-02-19 20:09:58,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:09:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:09:58,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:09:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:09:58,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:58,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:09:58,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:09:58,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:09:58,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:09:58,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:09:58,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:09:58,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:09:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:09:58,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:09:58,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:09:58,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670263291] [2021-02-19 20:09:58,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:09:58,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:09:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:09:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:09:58,666 INFO L87 Difference]: Start difference. First operand 643 states and 1308 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:02,301 INFO L93 Difference]: Finished difference Result 1084 states and 2162 transitions. [2021-02-19 20:10:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-02-19 20:10:02,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:02,302 INFO L225 Difference]: With dead ends: 1084 [2021-02-19 20:10:02,302 INFO L226 Difference]: Without dead ends: 1005 [2021-02-19 20:10:02,303 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=852, Invalid=8460, Unknown=0, NotChecked=0, Total=9312 [2021-02-19 20:10:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-02-19 20:10:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 648. [2021-02-19 20:10:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.034003091190108) internal successors, (1316), 647 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1316 transitions. [2021-02-19 20:10:02,309 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1316 transitions. Word has length 33 [2021-02-19 20:10:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:02,309 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1316 transitions. [2021-02-19 20:10:02,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1316 transitions. [2021-02-19 20:10:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:02,310 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:02,310 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:02,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:02,511 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:02,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1191802778, now seen corresponding path program 75 times [2021-02-19 20:10:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821231185] [2021-02-19 20:10:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:02,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821231185] [2021-02-19 20:10:02,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803524159] [2021-02-19 20:10:02,867 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 [2021-02-19 20:10:02,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:10:02,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:02,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:03,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:03,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:03,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:03,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:03,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:03,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:03,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:10:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:03,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:03,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:03,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144246658] [2021-02-19 20:10:03,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:03,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:03,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:03,384 INFO L87 Difference]: Start difference. First operand 648 states and 1316 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:05,451 INFO L93 Difference]: Finished difference Result 858 states and 1713 transitions. [2021-02-19 20:10:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 20:10:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:05,453 INFO L225 Difference]: With dead ends: 858 [2021-02-19 20:10:05,453 INFO L226 Difference]: Without dead ends: 799 [2021-02-19 20:10:05,453 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 20:10:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-02-19 20:10:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 661. [2021-02-19 20:10:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.0393939393939395) internal successors, (1346), 660 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1346 transitions. [2021-02-19 20:10:05,460 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1346 transitions. Word has length 33 [2021-02-19 20:10:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:05,460 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1346 transitions. [2021-02-19 20:10:05,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1346 transitions. [2021-02-19 20:10:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:05,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:05,461 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:05,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:05,661 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1188386500, now seen corresponding path program 76 times [2021-02-19 20:10:05,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:05,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057380670] [2021-02-19 20:10:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:06,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057380670] [2021-02-19 20:10:06,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345452252] [2021-02-19 20:10:06,017 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 [2021-02-19 20:10:06,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:10:06,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:06,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:06,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:06,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:06,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:06,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:06,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:06,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:06,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:06,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:06,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:06,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932803221] [2021-02-19 20:10:06,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:06,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:06,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:06,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:06,539 INFO L87 Difference]: Start difference. First operand 661 states and 1346 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:09,509 INFO L93 Difference]: Finished difference Result 923 states and 1836 transitions. [2021-02-19 20:10:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 20:10:09,510 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:09,510 INFO L225 Difference]: With dead ends: 923 [2021-02-19 20:10:09,510 INFO L226 Difference]: Without dead ends: 835 [2021-02-19 20:10:09,511 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=495, Invalid=5357, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 20:10:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-02-19 20:10:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 716. [2021-02-19 20:10:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-02-19 20:10:09,518 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 33 [2021-02-19 20:10:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:09,518 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-02-19 20:10:09,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-02-19 20:10:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:09,519 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:09,519 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:09,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:09,728 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1829497090, now seen corresponding path program 77 times [2021-02-19 20:10:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:09,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982729847] [2021-02-19 20:10:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:10,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982729847] [2021-02-19 20:10:10,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565812302] [2021-02-19 20:10:10,090 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 [2021-02-19 20:10:10,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:10:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:10,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:10,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:10,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:10,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:10,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:10,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:10,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:10,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:10,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:10,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:10,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268002846] [2021-02-19 20:10:10,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:10,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:10,645 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:13,721 INFO L93 Difference]: Finished difference Result 1025 states and 2053 transitions. [2021-02-19 20:10:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 20:10:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:13,723 INFO L225 Difference]: With dead ends: 1025 [2021-02-19 20:10:13,723 INFO L226 Difference]: Without dead ends: 945 [2021-02-19 20:10:13,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=619, Invalid=6521, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 20:10:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-02-19 20:10:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 735. [2021-02-19 20:10:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0395095367847413) internal successors, (1497), 734 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1497 transitions. [2021-02-19 20:10:13,730 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1497 transitions. Word has length 33 [2021-02-19 20:10:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:13,730 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1497 transitions. [2021-02-19 20:10:13,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1497 transitions. [2021-02-19 20:10:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:13,731 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:13,731 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:13,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:13,932 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash -403254724, now seen corresponding path program 78 times [2021-02-19 20:10:13,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:13,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805062057] [2021-02-19 20:10:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:14,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805062057] [2021-02-19 20:10:14,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743430087] [2021-02-19 20:10:14,298 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 [2021-02-19 20:10:14,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:10:14,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:14,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:14,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:14,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:14,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:14,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:14,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:14,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:14,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:14,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599445756] [2021-02-19 20:10:14,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:14,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:14,816 INFO L87 Difference]: Start difference. First operand 735 states and 1497 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:18,855 INFO L93 Difference]: Finished difference Result 999 states and 2002 transitions. [2021-02-19 20:10:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:10:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:18,856 INFO L225 Difference]: With dead ends: 999 [2021-02-19 20:10:18,856 INFO L226 Difference]: Without dead ends: 943 [2021-02-19 20:10:18,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 20:10:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-02-19 20:10:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 734. [2021-02-19 20:10:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.03956343792633) internal successors, (1495), 733 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1495 transitions. [2021-02-19 20:10:18,864 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1495 transitions. Word has length 33 [2021-02-19 20:10:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:18,864 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 1495 transitions. [2021-02-19 20:10:18,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1495 transitions. [2021-02-19 20:10:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:18,864 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:18,865 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:19,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:19,079 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:19,079 INFO L82 PathProgramCache]: Analyzing trace with hash -508101342, now seen corresponding path program 79 times [2021-02-19 20:10:19,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:19,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179539524] [2021-02-19 20:10:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:19,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179539524] [2021-02-19 20:10:19,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137477704] [2021-02-19 20:10:19,486 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 [2021-02-19 20:10:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:19,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:19,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:19,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:19,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:19,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:10:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:20,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:20,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:20,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009011783] [2021-02-19 20:10:20,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:20,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:20,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:20,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:20,042 INFO L87 Difference]: Start difference. First operand 734 states and 1495 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:22,465 INFO L93 Difference]: Finished difference Result 987 states and 1977 transitions. [2021-02-19 20:10:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 20:10:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:22,467 INFO L225 Difference]: With dead ends: 987 [2021-02-19 20:10:22,467 INFO L226 Difference]: Without dead ends: 931 [2021-02-19 20:10:22,467 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:10:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-02-19 20:10:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 817. [2021-02-19 20:10:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.0379901960784315) internal successors, (1663), 816 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1663 transitions. [2021-02-19 20:10:22,474 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1663 transitions. Word has length 33 [2021-02-19 20:10:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:22,474 INFO L480 AbstractCegarLoop]: Abstraction has 817 states and 1663 transitions. [2021-02-19 20:10:22,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1663 transitions. [2021-02-19 20:10:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:22,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:22,475 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:22,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:22,675 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:22,675 INFO L82 PathProgramCache]: Analyzing trace with hash 850227176, now seen corresponding path program 80 times [2021-02-19 20:10:22,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:22,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414878566] [2021-02-19 20:10:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:23,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414878566] [2021-02-19 20:10:23,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319815833] [2021-02-19 20:10:23,063 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) [2021-02-19 20:10:23,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:10:23,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:23,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:23,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:23,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:23,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:23,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:23,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:23,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:23,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:23,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:23,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:23,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:23,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670134498] [2021-02-19 20:10:23,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:23,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:23,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:23,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:23,687 INFO L87 Difference]: Start difference. First operand 817 states and 1663 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:25,254 INFO L93 Difference]: Finished difference Result 1026 states and 2044 transitions. [2021-02-19 20:10:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 20:10:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:25,256 INFO L225 Difference]: With dead ends: 1026 [2021-02-19 20:10:25,256 INFO L226 Difference]: Without dead ends: 930 [2021-02-19 20:10:25,256 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 20:10:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-02-19 20:10:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 842. [2021-02-19 20:10:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.036860879904875) internal successors, (1713), 841 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1713 transitions. [2021-02-19 20:10:25,263 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1713 transitions. Word has length 33 [2021-02-19 20:10:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:25,263 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 1713 transitions. [2021-02-19 20:10:25,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1713 transitions. [2021-02-19 20:10:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:25,264 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:25,264 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:25,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 20:10:25,465 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2059117530, now seen corresponding path program 81 times [2021-02-19 20:10:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:25,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918308692] [2021-02-19 20:10:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:25,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918308692] [2021-02-19 20:10:25,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274577752] [2021-02-19 20:10:25,855 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 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 [2021-02-19 20:10:25,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:10:25,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:25,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:26,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:26,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:26,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:26,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:26,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:26,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:26,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:26,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:26,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:26,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223727938] [2021-02-19 20:10:26,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:26,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:26,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:26,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:26,481 INFO L87 Difference]: Start difference. First operand 842 states and 1713 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:28,185 INFO L93 Difference]: Finished difference Result 1041 states and 2080 transitions. [2021-02-19 20:10:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 20:10:28,186 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:28,187 INFO L225 Difference]: With dead ends: 1041 [2021-02-19 20:10:28,187 INFO L226 Difference]: Without dead ends: 953 [2021-02-19 20:10:28,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 20:10:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-02-19 20:10:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 845. [2021-02-19 20:10:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.036729857819905) internal successors, (1719), 844 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1719 transitions. [2021-02-19 20:10:28,195 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1719 transitions. Word has length 33 [2021-02-19 20:10:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:28,195 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 1719 transitions. [2021-02-19 20:10:28,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1719 transitions. [2021-02-19 20:10:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:28,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:28,196 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:28,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:28,399 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:28,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1594739176, now seen corresponding path program 82 times [2021-02-19 20:10:28,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:28,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346108441] [2021-02-19 20:10:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346108441] [2021-02-19 20:10:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411526543] [2021-02-19 20:10:28,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:10:28,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:10:28,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:29,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:29,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:29,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:29,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:29,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:29,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:29,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:29,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:29,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:29,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933872876] [2021-02-19 20:10:29,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:29,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:29,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:29,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:29,398 INFO L87 Difference]: Start difference. First operand 845 states and 1719 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:31,989 INFO L93 Difference]: Finished difference Result 1128 states and 2259 transitions. [2021-02-19 20:10:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 20:10:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:31,991 INFO L225 Difference]: With dead ends: 1128 [2021-02-19 20:10:31,991 INFO L226 Difference]: Without dead ends: 1032 [2021-02-19 20:10:31,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:10:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-02-19 20:10:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 850. [2021-02-19 20:10:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.035335689045936) internal successors, (1728), 849 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1728 transitions. [2021-02-19 20:10:32,001 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1728 transitions. Word has length 33 [2021-02-19 20:10:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:32,001 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 1728 transitions. [2021-02-19 20:10:32,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1728 transitions. [2021-02-19 20:10:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:32,002 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:32,002 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:32,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-02-19 20:10:32,217 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1273985754, now seen corresponding path program 83 times [2021-02-19 20:10:32,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:32,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283910851] [2021-02-19 20:10:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:32,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283910851] [2021-02-19 20:10:32,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121408914] [2021-02-19 20:10:32,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:10:32,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:10:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:32,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:32,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:32,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:32,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:32,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:32,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:32,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:32,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:33,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:33,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:33,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186724861] [2021-02-19 20:10:33,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:33,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:33,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:33,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:33,196 INFO L87 Difference]: Start difference. First operand 850 states and 1728 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:36,561 INFO L93 Difference]: Finished difference Result 1294 states and 2586 transitions. [2021-02-19 20:10:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 20:10:36,562 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:36,563 INFO L225 Difference]: With dead ends: 1294 [2021-02-19 20:10:36,563 INFO L226 Difference]: Without dead ends: 1216 [2021-02-19 20:10:36,564 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 20:10:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-02-19 20:10:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 841. [2021-02-19 20:10:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.033333333333333) internal successors, (1708), 840 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1708 transitions. [2021-02-19 20:10:36,572 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1708 transitions. Word has length 33 [2021-02-19 20:10:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:36,572 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 1708 transitions. [2021-02-19 20:10:36,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1708 transitions. [2021-02-19 20:10:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:36,573 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:36,573 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:36,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:36,774 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2106348796, now seen corresponding path program 84 times [2021-02-19 20:10:36,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:36,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871128828] [2021-02-19 20:10:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:37,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871128828] [2021-02-19 20:10:37,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480378558] [2021-02-19 20:10:37,202 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 [2021-02-19 20:10:37,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:10:37,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:10:37,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:37,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:37,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:37,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:37,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:37,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:37,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:16 [2021-02-19 20:10:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:37,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:37,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 20:10:37,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557011347] [2021-02-19 20:10:37,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:10:37,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:10:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:10:37,835 INFO L87 Difference]: Start difference. First operand 841 states and 1708 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:40,620 INFO L93 Difference]: Finished difference Result 1058 states and 2111 transitions. [2021-02-19 20:10:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 20:10:40,621 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 20:10:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:40,623 INFO L225 Difference]: With dead ends: 1058 [2021-02-19 20:10:40,623 INFO L226 Difference]: Without dead ends: 996 [2021-02-19 20:10:40,623 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=487, Invalid=4625, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 20:10:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-02-19 20:10:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 862. [2021-02-19 20:10:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.032520325203252) internal successors, (1750), 861 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1750 transitions. [2021-02-19 20:10:40,631 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1750 transitions. Word has length 33 [2021-02-19 20:10:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:40,631 INFO L480 AbstractCegarLoop]: Abstraction has 862 states and 1750 transitions. [2021-02-19 20:10:40,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 20:10:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1750 transitions. [2021-02-19 20:10:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:40,632 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:40,632 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:40,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:40,834 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1692439838, now seen corresponding path program 85 times [2021-02-19 20:10:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:40,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092249988] [2021-02-19 20:10:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:41,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092249988] [2021-02-19 20:10:41,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017313332] [2021-02-19 20:10:41,188 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 [2021-02-19 20:10:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:41,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:41,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:41,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:41,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:41,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:41,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:41,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:41,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:41,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-02-19 20:10:41,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272794476] [2021-02-19 20:10:41,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:10:41,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:41,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:10:41,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:10:41,859 INFO L87 Difference]: Start difference. First operand 862 states and 1750 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 20:10:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:44,361 INFO L93 Difference]: Finished difference Result 1056 states and 2102 transitions. [2021-02-19 20:10:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:10:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 33 [2021-02-19 20:10:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:44,363 INFO L225 Difference]: With dead ends: 1056 [2021-02-19 20:10:44,363 INFO L226 Difference]: Without dead ends: 968 [2021-02-19 20:10:44,363 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=314, Invalid=3108, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:10:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-02-19 20:10:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2021-02-19 20:10:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.029445073612684) internal successors, (1792), 883 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1792 transitions. [2021-02-19 20:10:44,371 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1792 transitions. Word has length 33 [2021-02-19 20:10:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:44,371 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 1792 transitions. [2021-02-19 20:10:44,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 20:10:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1792 transitions. [2021-02-19 20:10:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:44,372 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:44,372 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:44,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:44,590 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:44,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:44,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1961416868, now seen corresponding path program 86 times [2021-02-19 20:10:44,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:44,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713511543] [2021-02-19 20:10:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:44,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713511543] [2021-02-19 20:10:44,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500052243] [2021-02-19 20:10:44,980 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 [2021-02-19 20:10:44,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:10:44,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:44,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:44,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:45,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:45,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:45,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:45,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:45,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:45,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:45,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-02-19 20:10:45,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045271240] [2021-02-19 20:10:45,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:10:45,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:10:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:10:45,588 INFO L87 Difference]: Start difference. First operand 884 states and 1792 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 20:10:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:48,309 INFO L93 Difference]: Finished difference Result 1078 states and 2150 transitions. [2021-02-19 20:10:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 20:10:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 33 [2021-02-19 20:10:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:48,311 INFO L225 Difference]: With dead ends: 1078 [2021-02-19 20:10:48,311 INFO L226 Difference]: Without dead ends: 1006 [2021-02-19 20:10:48,312 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 20:10:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-02-19 20:10:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 885. [2021-02-19 20:10:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.0294117647058822) internal successors, (1794), 884 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1794 transitions. [2021-02-19 20:10:48,320 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1794 transitions. Word has length 33 [2021-02-19 20:10:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:48,320 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 1794 transitions. [2021-02-19 20:10:48,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 20:10:48,320 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1794 transitions. [2021-02-19 20:10:48,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:48,321 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:48,321 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:48,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:48,521 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:48,522 INFO L82 PathProgramCache]: Analyzing trace with hash -907308062, now seen corresponding path program 87 times [2021-02-19 20:10:48,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:48,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834206871] [2021-02-19 20:10:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:48,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834206871] [2021-02-19 20:10:48,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132136713] [2021-02-19 20:10:48,941 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 [2021-02-19 20:10:48,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:10:48,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:49,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:10:49,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:10:49,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:10:49,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:49,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:49,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:49,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:10:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:49,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:49,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-02-19 20:10:49,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098777173] [2021-02-19 20:10:49,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:10:49,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:49,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:10:49,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:10:49,544 INFO L87 Difference]: Start difference. First operand 885 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 20:10:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:52,832 INFO L93 Difference]: Finished difference Result 1116 states and 2231 transitions. [2021-02-19 20:10:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 20:10:52,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 33 [2021-02-19 20:10:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:52,834 INFO L225 Difference]: With dead ends: 1116 [2021-02-19 20:10:52,834 INFO L226 Difference]: Without dead ends: 1054 [2021-02-19 20:10:52,834 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=520, Invalid=4592, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 20:10:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-02-19 20:10:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 875. [2021-02-19 20:10:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.028604118993135) internal successors, (1773), 874 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) [2021-02-19 20:10:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1773 transitions. [2021-02-19 20:10:52,842 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1773 transitions. Word has length 33 [2021-02-19 20:10:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:52,842 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 1773 transitions. [2021-02-19 20:10:52,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 20:10:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1773 transitions. [2021-02-19 20:10:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:52,843 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:52,843 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:53,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:53,043 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash 609855962, now seen corresponding path program 88 times [2021-02-19 20:10:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:53,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170812140] [2021-02-19 20:10:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:53,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170812140] [2021-02-19 20:10:53,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968446571] [2021-02-19 20:10:53,423 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 [2021-02-19 20:10:53,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:10:53,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:10:53,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:53,864 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:10:53,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:10:53,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:53,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:53,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:53,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:10:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:54,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:54,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:10:54,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261721388] [2021-02-19 20:10:54,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:10:54,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:10:54,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:10:54,076 INFO L87 Difference]: Start difference. First operand 875 states and 1773 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:10:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:55,503 INFO L93 Difference]: Finished difference Result 1029 states and 2048 transitions. [2021-02-19 20:10:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:10:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:10:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:55,505 INFO L225 Difference]: With dead ends: 1029 [2021-02-19 20:10:55,505 INFO L226 Difference]: Without dead ends: 981 [2021-02-19 20:10:55,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 20:10:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-02-19 20:10:55,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 896. [2021-02-19 20:10:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.029050279329609) internal successors, (1816), 895 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1816 transitions. [2021-02-19 20:10:55,513 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1816 transitions. Word has length 33 [2021-02-19 20:10:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:55,514 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 1816 transitions. [2021-02-19 20:10:55,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:10:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1816 transitions. [2021-02-19 20:10:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:55,515 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:55,515 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:55,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:10:55,718 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1889227676, now seen corresponding path program 89 times [2021-02-19 20:10:55,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:55,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234668021] [2021-02-19 20:10:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234668021] [2021-02-19 20:10:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241311913] [2021-02-19 20:10:56,117 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 [2021-02-19 20:10:56,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:10:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:56,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:10:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:56,504 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:10:56,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:10:56,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:56,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:56,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:56,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:10:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:56,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:56,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:10:56,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972166344] [2021-02-19 20:10:56,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:10:56,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:10:56,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:10:56,685 INFO L87 Difference]: Start difference. First operand 896 states and 1816 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:10:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:10:58,326 INFO L93 Difference]: Finished difference Result 1066 states and 2115 transitions. [2021-02-19 20:10:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:10:58,327 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:10:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:10:58,329 INFO L225 Difference]: With dead ends: 1066 [2021-02-19 20:10:58,329 INFO L226 Difference]: Without dead ends: 1018 [2021-02-19 20:10:58,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 20:10:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-02-19 20:10:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 897. [2021-02-19 20:10:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.029017857142857) internal successors, (1818), 896 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:10:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1818 transitions. [2021-02-19 20:10:58,337 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1818 transitions. Word has length 33 [2021-02-19 20:10:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:10:58,337 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1818 transitions. [2021-02-19 20:10:58,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:10:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1818 transitions. [2021-02-19 20:10:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:10:58,338 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:10:58,338 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:10:58,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 20:10:58,539 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:10:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:10:58,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1020117030, now seen corresponding path program 90 times [2021-02-19 20:10:58,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:10:58,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612799267] [2021-02-19 20:10:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:10:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:10:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:58,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612799267] [2021-02-19 20:10:58,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359096091] [2021-02-19 20:10:58,861 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 [2021-02-19 20:10:58,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:10:58,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:10:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:10:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:10:59,297 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:10:59,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:10:59,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:10:59,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:10:59,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:10:59,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:10:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:10:59,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:10:59,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:10:59,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722544713] [2021-02-19 20:10:59,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:10:59,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:10:59,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:10:59,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:10:59,518 INFO L87 Difference]: Start difference. First operand 897 states and 1818 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:01,435 INFO L93 Difference]: Finished difference Result 1104 states and 2193 transitions. [2021-02-19 20:11:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:11:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:01,437 INFO L225 Difference]: With dead ends: 1104 [2021-02-19 20:11:01,437 INFO L226 Difference]: Without dead ends: 1056 [2021-02-19 20:11:01,437 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 20:11:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-02-19 20:11:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 901. [2021-02-19 20:11:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.028888888888889) internal successors, (1826), 900 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1826 transitions. [2021-02-19 20:11:01,445 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1826 transitions. Word has length 33 [2021-02-19 20:11:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:01,445 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 1826 transitions. [2021-02-19 20:11:01,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1826 transitions. [2021-02-19 20:11:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:01,446 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:01,446 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:01,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:11:01,646 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1661227620, now seen corresponding path program 91 times [2021-02-19 20:11:01,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:01,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419781340] [2021-02-19 20:11:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:02,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419781340] [2021-02-19 20:11:02,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319213646] [2021-02-19 20:11:02,118 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 [2021-02-19 20:11:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:02,538 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:11:02,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:11:02,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:02,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:02,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:02,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:11:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:02,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:02,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:02,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281306137] [2021-02-19 20:11:02,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:02,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:02,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:02,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:02,817 INFO L87 Difference]: Start difference. First operand 901 states and 1826 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:04,759 INFO L93 Difference]: Finished difference Result 1137 states and 2262 transitions. [2021-02-19 20:11:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 20:11:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:04,762 INFO L225 Difference]: With dead ends: 1137 [2021-02-19 20:11:04,762 INFO L226 Difference]: Without dead ends: 1105 [2021-02-19 20:11:04,762 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 20:11:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-02-19 20:11:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 902. [2021-02-19 20:11:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0288568257491675) internal successors, (1828), 901 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1828 transitions. [2021-02-19 20:11:04,769 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1828 transitions. Word has length 33 [2021-02-19 20:11:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:04,769 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 1828 transitions. [2021-02-19 20:11:04,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1828 transitions. [2021-02-19 20:11:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:04,770 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:04,770 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:04,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 20:11:04,971 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash -234985254, now seen corresponding path program 92 times [2021-02-19 20:11:04,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:04,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024908073] [2021-02-19 20:11:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:05,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024908073] [2021-02-19 20:11:05,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795996914] [2021-02-19 20:11:05,377 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 [2021-02-19 20:11:05,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:11:05,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:05,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:05,691 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:11:05,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:11:05,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:05,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:05,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:05,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:11:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:05,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:05,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:05,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527438491] [2021-02-19 20:11:05,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:05,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:05,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:05,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:05,982 INFO L87 Difference]: Start difference. First operand 902 states and 1828 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:08,985 INFO L93 Difference]: Finished difference Result 1204 states and 2391 transitions. [2021-02-19 20:11:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:11:08,987 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:08,988 INFO L225 Difference]: With dead ends: 1204 [2021-02-19 20:11:08,988 INFO L226 Difference]: Without dead ends: 1160 [2021-02-19 20:11:08,988 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=303, Invalid=3237, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:11:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-02-19 20:11:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 898. [2021-02-19 20:11:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0256410256410255) internal successors, (1817), 897 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1817 transitions. [2021-02-19 20:11:08,996 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1817 transitions. Word has length 33 [2021-02-19 20:11:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:08,996 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 1817 transitions. [2021-02-19 20:11:08,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1817 transitions. [2021-02-19 20:11:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:08,997 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:08,997 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:09,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:11:09,198 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:09,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:09,198 INFO L82 PathProgramCache]: Analyzing trace with hash -872700966, now seen corresponding path program 93 times [2021-02-19 20:11:09,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:09,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071426703] [2021-02-19 20:11:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:09,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071426703] [2021-02-19 20:11:09,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548715196] [2021-02-19 20:11:09,629 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 [2021-02-19 20:11:09,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:11:09,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:09,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:09,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:10,011 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:11:10,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:11:10,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:10,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:10,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:10,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-02-19 20:11:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:10,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:10,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:10,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866586233] [2021-02-19 20:11:10,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:10,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:10,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:10,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:10,288 INFO L87 Difference]: Start difference. First operand 898 states and 1817 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:12,353 INFO L93 Difference]: Finished difference Result 1027 states and 2063 transitions. [2021-02-19 20:11:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:11:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:12,356 INFO L225 Difference]: With dead ends: 1027 [2021-02-19 20:11:12,356 INFO L226 Difference]: Without dead ends: 999 [2021-02-19 20:11:12,356 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:11:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-02-19 20:11:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 890. [2021-02-19 20:11:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.0258717660292462) internal successors, (1801), 889 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1801 transitions. [2021-02-19 20:11:12,364 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1801 transitions. Word has length 33 [2021-02-19 20:11:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:12,364 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 1801 transitions. [2021-02-19 20:11:12,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1801 transitions. [2021-02-19 20:11:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:12,365 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:12,365 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:12,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 20:11:12,566 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:12,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1603922840, now seen corresponding path program 94 times [2021-02-19 20:11:12,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:12,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649041785] [2021-02-19 20:11:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:12,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649041785] [2021-02-19 20:11:12,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585315541] [2021-02-19 20:11:12,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:11:12,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:11:12,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:12,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:13,437 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:11:13,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:11:13,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:13,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:13,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:13,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:11:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:13,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:13,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:13,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646141562] [2021-02-19 20:11:13,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:13,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:13,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:13,667 INFO L87 Difference]: Start difference. First operand 890 states and 1801 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:15,675 INFO L93 Difference]: Finished difference Result 1070 states and 2128 transitions. [2021-02-19 20:11:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 20:11:15,676 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:15,677 INFO L225 Difference]: With dead ends: 1070 [2021-02-19 20:11:15,677 INFO L226 Difference]: Without dead ends: 974 [2021-02-19 20:11:15,677 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=292, Invalid=3130, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:11:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-02-19 20:11:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 907. [2021-02-19 20:11:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0275938189845473) internal successors, (1837), 906 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1837 transitions. [2021-02-19 20:11:15,684 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1837 transitions. Word has length 33 [2021-02-19 20:11:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:15,684 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 1837 transitions. [2021-02-19 20:11:15,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1837 transitions. [2021-02-19 20:11:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:15,685 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:15,685 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:15,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 20:11:15,886 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:15,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1305421866, now seen corresponding path program 95 times [2021-02-19 20:11:15,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:15,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823208663] [2021-02-19 20:11:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:16,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823208663] [2021-02-19 20:11:16,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754298141] [2021-02-19 20:11:16,353 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 [2021-02-19 20:11:16,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:11:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 20:11:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:16,842 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:11:16,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:11:16,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:16,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:16,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:16,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:11:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:17,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:17,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-02-19 20:11:17,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792986702] [2021-02-19 20:11:17,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:11:17,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:17,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:11:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:11:17,165 INFO L87 Difference]: Start difference. First operand 907 states and 1837 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 20:11:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:20,309 INFO L93 Difference]: Finished difference Result 1128 states and 2252 transitions. [2021-02-19 20:11:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:11:20,309 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 33 [2021-02-19 20:11:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:20,310 INFO L225 Difference]: With dead ends: 1128 [2021-02-19 20:11:20,310 INFO L226 Difference]: Without dead ends: 1033 [2021-02-19 20:11:20,311 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=410, Invalid=4282, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 20:11:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-02-19 20:11:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 916. [2021-02-19 20:11:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.0273224043715845) internal successors, (1855), 915 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1855 transitions. [2021-02-19 20:11:20,318 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1855 transitions. Word has length 33 [2021-02-19 20:11:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:20,318 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 1855 transitions. [2021-02-19 20:11:20,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 20:11:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1855 transitions. [2021-02-19 20:11:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:20,319 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:20,319 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:20,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 20:11:20,522 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1946532456, now seen corresponding path program 96 times [2021-02-19 20:11:20,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:20,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140207236] [2021-02-19 20:11:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:20,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140207236] [2021-02-19 20:11:20,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890441286] [2021-02-19 20:11:20,991 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 [2021-02-19 20:11:21,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:11:21,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:21,454 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:11:21,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:11:21,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:21,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:21,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:21,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:11:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:21,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:21,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:21,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25441159] [2021-02-19 20:11:21,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:21,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:21,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:21,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:21,749 INFO L87 Difference]: Start difference. First operand 916 states and 1855 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:25,267 INFO L93 Difference]: Finished difference Result 1153 states and 2299 transitions. [2021-02-19 20:11:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 20:11:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:25,270 INFO L225 Difference]: With dead ends: 1153 [2021-02-19 20:11:25,270 INFO L226 Difference]: Without dead ends: 1073 [2021-02-19 20:11:25,271 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=537, Invalid=4433, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:11:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-02-19 20:11:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 912. [2021-02-19 20:11:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.0241492864983535) internal successors, (1844), 911 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1844 transitions. [2021-02-19 20:11:25,279 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1844 transitions. Word has length 33 [2021-02-19 20:11:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:25,279 INFO L480 AbstractCegarLoop]: Abstraction has 912 states and 1844 transitions. [2021-02-19 20:11:25,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1844 transitions. [2021-02-19 20:11:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:25,280 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:25,280 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:25,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:11:25,480 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash -520290090, now seen corresponding path program 97 times [2021-02-19 20:11:25,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:25,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987584105] [2021-02-19 20:11:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:25,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987584105] [2021-02-19 20:11:25,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684378882] [2021-02-19 20:11:25,882 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 [2021-02-19 20:11:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:26,340 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:11:26,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:11:26,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:26,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:26,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:26,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:11:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:26,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:26,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:26,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193288311] [2021-02-19 20:11:26,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:26,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:26,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:26,637 INFO L87 Difference]: Start difference. First operand 912 states and 1844 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:30,682 INFO L93 Difference]: Finished difference Result 1223 states and 2439 transitions. [2021-02-19 20:11:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 20:11:30,683 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:30,684 INFO L225 Difference]: With dead ends: 1223 [2021-02-19 20:11:30,685 INFO L226 Difference]: Without dead ends: 1164 [2021-02-19 20:11:30,685 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=559, Invalid=4843, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 20:11:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-02-19 20:11:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2021-02-19 20:11:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0242825607064017) internal successors, (1834), 906 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1834 transitions. [2021-02-19 20:11:30,698 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1834 transitions. Word has length 33 [2021-02-19 20:11:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:30,699 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 1834 transitions. [2021-02-19 20:11:30,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1834 transitions. [2021-02-19 20:11:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:30,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:30,700 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:30,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 20:11:30,901 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:30,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1434922836, now seen corresponding path program 98 times [2021-02-19 20:11:30,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:30,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391487059] [2021-02-19 20:11:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:31,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391487059] [2021-02-19 20:11:31,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664196295] [2021-02-19 20:11:31,423 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 [2021-02-19 20:11:31,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:11:31,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:31,873 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:11:31,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:11:31,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:31,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:31,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:31,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:11:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:32,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:32,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:32,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946915194] [2021-02-19 20:11:32,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:32,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:32,281 INFO L87 Difference]: Start difference. First operand 907 states and 1834 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:36,204 INFO L93 Difference]: Finished difference Result 1093 states and 2183 transitions. [2021-02-19 20:11:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 20:11:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:36,206 INFO L225 Difference]: With dead ends: 1093 [2021-02-19 20:11:36,206 INFO L226 Difference]: Without dead ends: 1034 [2021-02-19 20:11:36,207 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:11:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-02-19 20:11:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 922. [2021-02-19 20:11:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.023887079261672) internal successors, (1864), 921 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:36,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1864 transitions. [2021-02-19 20:11:36,215 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1864 transitions. Word has length 33 [2021-02-19 20:11:36,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:36,215 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 1864 transitions. [2021-02-19 20:11:36,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1864 transitions. [2021-02-19 20:11:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:36,216 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:36,216 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:36,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:11:36,416 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1276607946, now seen corresponding path program 99 times [2021-02-19 20:11:36,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:36,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765876953] [2021-02-19 20:11:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:36,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765876953] [2021-02-19 20:11:36,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936184069] [2021-02-19 20:11:36,960 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 [2021-02-19 20:11:36,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:11:36,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:37,552 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:11:37,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:11:37,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:37,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:37,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:37,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:11:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:37,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:37,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:37,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614763235] [2021-02-19 20:11:37,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:37,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:37,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:37,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:37,817 INFO L87 Difference]: Start difference. First operand 922 states and 1864 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:40,795 INFO L93 Difference]: Finished difference Result 1156 states and 2301 transitions. [2021-02-19 20:11:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 20:11:40,797 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:40,798 INFO L225 Difference]: With dead ends: 1156 [2021-02-19 20:11:40,798 INFO L226 Difference]: Without dead ends: 1060 [2021-02-19 20:11:40,798 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 20:11:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-02-19 20:11:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 966. [2021-02-19 20:11:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.0300518134715024) internal successors, (1959), 965 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1959 transitions. [2021-02-19 20:11:40,806 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1959 transitions. Word has length 33 [2021-02-19 20:11:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:40,806 INFO L480 AbstractCegarLoop]: Abstraction has 966 states and 1959 transitions. [2021-02-19 20:11:40,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1959 transitions. [2021-02-19 20:11:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:40,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:40,807 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:41,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 20:11:41,009 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1632736760, now seen corresponding path program 100 times [2021-02-19 20:11:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:41,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007089659] [2021-02-19 20:11:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:41,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007089659] [2021-02-19 20:11:41,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133421647] [2021-02-19 20:11:41,565 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 [2021-02-19 20:11:41,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:11:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:11:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:42,065 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:11:42,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:11:42,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:42,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:42,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:42,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:11:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:42,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:42,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:42,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722968693] [2021-02-19 20:11:42,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:42,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:42,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:42,335 INFO L87 Difference]: Start difference. First operand 966 states and 1959 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:46,658 INFO L93 Difference]: Finished difference Result 1272 states and 2548 transitions. [2021-02-19 20:11:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 20:11:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:11:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:46,660 INFO L225 Difference]: With dead ends: 1272 [2021-02-19 20:11:46,660 INFO L226 Difference]: Without dead ends: 1170 [2021-02-19 20:11:46,660 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=447, Invalid=4523, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:11:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-02-19 20:11:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1008. [2021-02-19 20:11:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.034756703078451) internal successors, (2049), 1007 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2049 transitions. [2021-02-19 20:11:46,668 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2049 transitions. Word has length 33 [2021-02-19 20:11:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:46,668 INFO L480 AbstractCegarLoop]: Abstraction has 1008 states and 2049 transitions. [2021-02-19 20:11:46,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:11:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2049 transitions. [2021-02-19 20:11:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:46,669 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:46,669 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:46,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:11:46,870 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:46,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:46,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2021119946, now seen corresponding path program 101 times [2021-02-19 20:11:46,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:46,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722197163] [2021-02-19 20:11:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722197163] [2021-02-19 20:11:47,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449687778] [2021-02-19 20:11:47,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:11:47,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:11:47,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:11:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:11:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:11:48,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:11:48,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:11:48,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:48,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:48,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:48,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 20:11:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:48,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:48,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-02-19 20:11:48,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118036799] [2021-02-19 20:11:48,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:11:48,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:11:48,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:11:48,551 INFO L87 Difference]: Start difference. First operand 1008 states and 2049 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 20:11:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:11:55,114 INFO L93 Difference]: Finished difference Result 1420 states and 2865 transitions. [2021-02-19 20:11:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:11:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 33 [2021-02-19 20:11:55,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:11:55,117 INFO L225 Difference]: With dead ends: 1420 [2021-02-19 20:11:55,117 INFO L226 Difference]: Without dead ends: 1321 [2021-02-19 20:11:55,118 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=797, Invalid=7945, Unknown=0, NotChecked=0, Total=8742 [2021-02-19 20:11:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-02-19 20:11:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1033. [2021-02-19 20:11:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.0339147286821704) internal successors, (2099), 1032 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:11:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2099 transitions. [2021-02-19 20:11:55,127 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2099 transitions. Word has length 33 [2021-02-19 20:11:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:11:55,127 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 2099 transitions. [2021-02-19 20:11:55,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 20:11:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2099 transitions. [2021-02-19 20:11:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:11:55,128 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:11:55,128 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:11:55,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:11:55,328 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:11:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:11:55,329 INFO L82 PathProgramCache]: Analyzing trace with hash -847604984, now seen corresponding path program 102 times [2021-02-19 20:11:55,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:11:55,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19102024] [2021-02-19 20:11:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:11:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:11:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:55,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19102024] [2021-02-19 20:11:55,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176723247] [2021-02-19 20:11:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:11:55,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:11:55,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:11:55,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:11:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:11:56,498 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:11:56,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:11:56,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:11:56,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:11:56,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:11:56,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-02-19 20:11:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:11:56,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:11:56,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:11:56,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724321816] [2021-02-19 20:11:56,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:11:56,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:11:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:11:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:11:56,853 INFO L87 Difference]: Start difference. First operand 1033 states and 2099 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:03,979 INFO L93 Difference]: Finished difference Result 1535 states and 3095 transitions. [2021-02-19 20:12:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 20:12:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:12:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:03,982 INFO L225 Difference]: With dead ends: 1535 [2021-02-19 20:12:03,982 INFO L226 Difference]: Without dead ends: 1473 [2021-02-19 20:12:03,982 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=799, Invalid=7757, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 20:12:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-02-19 20:12:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1125. [2021-02-19 20:12:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.038256227758007) internal successors, (2291), 1124 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2291 transitions. [2021-02-19 20:12:03,992 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2291 transitions. Word has length 33 [2021-02-19 20:12:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:03,992 INFO L480 AbstractCegarLoop]: Abstraction has 1125 states and 2291 transitions. [2021-02-19 20:12:03,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2291 transitions. [2021-02-19 20:12:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:03,993 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:03,993 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:04,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-02-19 20:12:04,193 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1762237730, now seen corresponding path program 103 times [2021-02-19 20:12:04,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:04,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834452919] [2021-02-19 20:12:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:04,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834452919] [2021-02-19 20:12:04,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773425842] [2021-02-19 20:12:04,952 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 [2021-02-19 20:12:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:04,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:12:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:05,527 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:12:05,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:12:05,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:05,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:05,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:05,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:12:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:05,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:05,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:12:05,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665795724] [2021-02-19 20:12:05,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:12:05,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:12:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:12:05,880 INFO L87 Difference]: Start difference. First operand 1125 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:10,400 INFO L93 Difference]: Finished difference Result 1427 states and 2865 transitions. [2021-02-19 20:12:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 20:12:10,402 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:12:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:10,404 INFO L225 Difference]: With dead ends: 1427 [2021-02-19 20:12:10,404 INFO L226 Difference]: Without dead ends: 1371 [2021-02-19 20:12:10,405 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 20:12:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-02-19 20:12:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1213. [2021-02-19 20:12:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.0354785478547854) internal successors, (2467), 1212 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2467 transitions. [2021-02-19 20:12:10,416 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2467 transitions. Word has length 33 [2021-02-19 20:12:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:10,416 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 2467 transitions. [2021-02-19 20:12:10,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2467 transitions. [2021-02-19 20:12:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:10,417 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:10,417 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:10,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:12:10,618 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:10,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1758821452, now seen corresponding path program 104 times [2021-02-19 20:12:10,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:10,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348450910] [2021-02-19 20:12:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:11,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348450910] [2021-02-19 20:12:11,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958544711] [2021-02-19 20:12:11,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:12:11,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:12:11,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:12:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:12:11,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:12,041 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:12:12,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:12:12,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:12,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:12,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:12,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:12:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:12,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:12,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:12:12,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793907501] [2021-02-19 20:12:12,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:12:12,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:12:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:12:12,352 INFO L87 Difference]: Start difference. First operand 1213 states and 2467 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:17,456 INFO L93 Difference]: Finished difference Result 1723 states and 3477 transitions. [2021-02-19 20:12:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 20:12:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:12:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:17,460 INFO L225 Difference]: With dead ends: 1723 [2021-02-19 20:12:17,460 INFO L226 Difference]: Without dead ends: 1635 [2021-02-19 20:12:17,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=518, Invalid=5488, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 20:12:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-02-19 20:12:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1449. [2021-02-19 20:12:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.033839779005525) internal successors, (2945), 1448 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2945 transitions. [2021-02-19 20:12:17,473 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2945 transitions. Word has length 33 [2021-02-19 20:12:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:17,473 INFO L480 AbstractCegarLoop]: Abstraction has 1449 states and 2945 transitions. [2021-02-19 20:12:17,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2945 transitions. [2021-02-19 20:12:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:17,474 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:17,475 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:17,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:12:17,689 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1895035254, now seen corresponding path program 105 times [2021-02-19 20:12:17,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:17,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983296225] [2021-02-19 20:12:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:18,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983296225] [2021-02-19 20:12:18,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183092820] [2021-02-19 20:12:18,434 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 [2021-02-19 20:12:18,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:12:18,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:12:18,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:12:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:18,830 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:12:18,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:12:18,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:18,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:18,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:18,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:12:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:19,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:19,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:12:19,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825356273] [2021-02-19 20:12:19,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:12:19,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:19,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:12:19,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:12:19,225 INFO L87 Difference]: Start difference. First operand 1449 states and 2945 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:25,718 INFO L93 Difference]: Finished difference Result 1938 states and 3950 transitions. [2021-02-19 20:12:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 20:12:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:12:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:25,723 INFO L225 Difference]: With dead ends: 1938 [2021-02-19 20:12:25,723 INFO L226 Difference]: Without dead ends: 1858 [2021-02-19 20:12:25,723 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=642, Invalid=6668, Unknown=0, NotChecked=0, Total=7310 [2021-02-19 20:12:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-02-19 20:12:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1298. [2021-02-19 20:12:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.0323824209714725) internal successors, (2636), 1297 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2636 transitions. [2021-02-19 20:12:25,736 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2636 transitions. Word has length 33 [2021-02-19 20:12:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:25,736 INFO L480 AbstractCegarLoop]: Abstraction has 1298 states and 2636 transitions. [2021-02-19 20:12:25,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2636 transitions. [2021-02-19 20:12:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:25,737 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:25,737 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:25,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 20:12:25,938 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:25,938 INFO L82 PathProgramCache]: Analyzing trace with hash -973689676, now seen corresponding path program 106 times [2021-02-19 20:12:25,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:25,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263741318] [2021-02-19 20:12:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:26,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263741318] [2021-02-19 20:12:26,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11141784] [2021-02-19 20:12:26,672 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 [2021-02-19 20:12:26,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:12:26,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:12:26,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:12:26,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:27,269 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:12:27,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:12:27,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:27,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:27,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:27,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:12:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:27,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:27,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:12:27,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263278078] [2021-02-19 20:12:27,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:12:27,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:12:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:12:27,501 INFO L87 Difference]: Start difference. First operand 1298 states and 2636 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:34,861 INFO L93 Difference]: Finished difference Result 1677 states and 3376 transitions. [2021-02-19 20:12:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:12:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:12:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:34,865 INFO L225 Difference]: With dead ends: 1677 [2021-02-19 20:12:34,865 INFO L226 Difference]: Without dead ends: 1621 [2021-02-19 20:12:34,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 20:12:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-02-19 20:12:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1260. [2021-02-19 20:12:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.0309769658459094) internal successors, (2557), 1259 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2557 transitions. [2021-02-19 20:12:34,884 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2557 transitions. Word has length 33 [2021-02-19 20:12:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:34,884 INFO L480 AbstractCegarLoop]: Abstraction has 1260 states and 2557 transitions. [2021-02-19 20:12:34,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2557 transitions. [2021-02-19 20:12:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:34,885 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:34,885 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:35,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 20:12:35,086 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1078536294, now seen corresponding path program 107 times [2021-02-19 20:12:35,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:35,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926651463] [2021-02-19 20:12:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:35,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926651463] [2021-02-19 20:12:35,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281986207] [2021-02-19 20:12:35,899 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 [2021-02-19 20:12:35,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:12:35,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:12:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:12:35,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:36,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:12:36,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:12:36,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:12:36,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:12:36,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:36,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:36,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:36,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 20:12:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:37,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:37,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-02-19 20:12:37,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859144035] [2021-02-19 20:12:37,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:12:37,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:37,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:12:37,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:12:37,028 INFO L87 Difference]: Start difference. First operand 1260 states and 2557 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 20:12:39,208 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 20:12:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:42,698 INFO L93 Difference]: Finished difference Result 1775 states and 3563 transitions. [2021-02-19 20:12:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 20:12:42,700 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 33 [2021-02-19 20:12:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:42,702 INFO L225 Difference]: With dead ends: 1775 [2021-02-19 20:12:42,702 INFO L226 Difference]: Without dead ends: 1705 [2021-02-19 20:12:42,702 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=519, Invalid=4883, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 20:12:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-02-19 20:12:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1472. [2021-02-19 20:12:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-02-19 20:12:42,714 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-02-19 20:12:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:42,714 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-02-19 20:12:42,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 20:12:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-02-19 20:12:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:42,715 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:42,715 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:42,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 20:12:42,916 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash 279792224, now seen corresponding path program 108 times [2021-02-19 20:12:42,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:42,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961038205] [2021-02-19 20:12:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:43,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961038205] [2021-02-19 20:12:43,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940119729] [2021-02-19 20:12:43,458 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 [2021-02-19 20:12:43,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:12:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:12:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:12:43,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:44,030 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:12:44,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:12:44,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:44,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:44,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:44,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-02-19 20:12:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:44,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:44,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:12:44,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147956010] [2021-02-19 20:12:44,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:12:44,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:44,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:12:44,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:12:44,287 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:47,076 INFO L93 Difference]: Finished difference Result 1677 states and 3355 transitions. [2021-02-19 20:12:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 20:12:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:12:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:47,080 INFO L225 Difference]: With dead ends: 1677 [2021-02-19 20:12:47,080 INFO L226 Difference]: Without dead ends: 1581 [2021-02-19 20:12:47,080 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 20:12:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-02-19 20:12:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1497. [2021-02-19 20:12:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.0267379679144386) internal successors, (3032), 1496 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3032 transitions. [2021-02-19 20:12:47,092 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3032 transitions. Word has length 33 [2021-02-19 20:12:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:47,092 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 3032 transitions. [2021-02-19 20:12:47,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3032 transitions. [2021-02-19 20:12:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:47,093 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:47,093 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:47,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:12:47,294 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1665414814, now seen corresponding path program 109 times [2021-02-19 20:12:47,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:47,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892303368] [2021-02-19 20:12:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:47,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892303368] [2021-02-19 20:12:47,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773698042] [2021-02-19 20:12:47,850 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 [2021-02-19 20:12:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:47,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:12:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:48,313 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:12:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:12:48,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:48,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:48,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:48,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:12:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:48,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:48,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:12:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340974329] [2021-02-19 20:12:48,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:12:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:12:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:12:48,639 INFO L87 Difference]: Start difference. First operand 1497 states and 3032 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:51,764 INFO L93 Difference]: Finished difference Result 1692 states and 3391 transitions. [2021-02-19 20:12:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 20:12:51,766 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:12:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:51,767 INFO L225 Difference]: With dead ends: 1692 [2021-02-19 20:12:51,767 INFO L226 Difference]: Without dead ends: 1604 [2021-02-19 20:12:51,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 20:12:51,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-02-19 20:12:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1500. [2021-02-19 20:12:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 2.026684456304203) internal successors, (3038), 1499 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 3038 transitions. [2021-02-19 20:12:51,780 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 3038 transitions. Word has length 33 [2021-02-19 20:12:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:51,780 INFO L480 AbstractCegarLoop]: Abstraction has 1500 states and 3038 transitions. [2021-02-19 20:12:51,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 3038 transitions. [2021-02-19 20:12:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:51,781 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:51,781 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:51,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 20:12:51,982 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1024304224, now seen corresponding path program 110 times [2021-02-19 20:12:51,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:51,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377757749] [2021-02-19 20:12:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:52,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377757749] [2021-02-19 20:12:52,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755407939] [2021-02-19 20:12:52,621 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 [2021-02-19 20:12:52,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:12:52,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:12:52,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:12:52,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:53,264 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:12:53,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:12:53,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:53,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:53,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:53,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:12:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:53,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:53,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:12:53,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887716816] [2021-02-19 20:12:53,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:12:53,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:12:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:12:53,635 INFO L87 Difference]: Start difference. First operand 1500 states and 3038 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:12:57,615 INFO L93 Difference]: Finished difference Result 1779 states and 3570 transitions. [2021-02-19 20:12:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 20:12:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:12:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:12:57,620 INFO L225 Difference]: With dead ends: 1779 [2021-02-19 20:12:57,620 INFO L226 Difference]: Without dead ends: 1683 [2021-02-19 20:12:57,620 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=501, Invalid=4611, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 20:12:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-02-19 20:12:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1505. [2021-02-19 20:12:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.02593085106383) internal successors, (3047), 1504 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:12:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3047 transitions. [2021-02-19 20:12:57,638 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3047 transitions. Word has length 33 [2021-02-19 20:12:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:12:57,638 INFO L480 AbstractCegarLoop]: Abstraction has 1505 states and 3047 transitions. [2021-02-19 20:12:57,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:12:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3047 transitions. [2021-02-19 20:12:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:12:57,639 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:12:57,639 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:12:57,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-02-19 20:12:57,840 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:12:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:12:57,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1844420706, now seen corresponding path program 111 times [2021-02-19 20:12:57,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:12:57,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632491777] [2021-02-19 20:12:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:12:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:12:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:58,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632491777] [2021-02-19 20:12:58,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291062722] [2021-02-19 20:12:58,296 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 [2021-02-19 20:12:58,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:12:58,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:12:58,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:12:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:12:58,917 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:12:58,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:12:58,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:12:58,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:12:58,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:12:58,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:12:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:12:59,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:12:59,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:12:59,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938372311] [2021-02-19 20:12:59,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:12:59,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:12:59,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:12:59,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:12:59,320 INFO L87 Difference]: Start difference. First operand 1505 states and 3047 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:13:04,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:04,958 INFO L93 Difference]: Finished difference Result 1945 states and 3897 transitions. [2021-02-19 20:13:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 20:13:04,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:13:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:04,963 INFO L225 Difference]: With dead ends: 1945 [2021-02-19 20:13:04,963 INFO L226 Difference]: Without dead ends: 1867 [2021-02-19 20:13:04,963 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=689, Invalid=6451, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 20:13:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-02-19 20:13:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1496. [2021-02-19 20:13:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-02-19 20:13:04,979 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-02-19 20:13:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:04,979 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-02-19 20:13:04,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:13:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-02-19 20:13:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:04,980 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:04,980 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:05,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 20:13:05,181 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1535913844, now seen corresponding path program 112 times [2021-02-19 20:13:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:05,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368579912] [2021-02-19 20:13:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:05,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368579912] [2021-02-19 20:13:05,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762783988] [2021-02-19 20:13:05,914 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 [2021-02-19 20:13:05,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:13:05,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:13:05,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:06,445 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:13:06,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:13:06,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:06,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:06,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:06,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:13:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:06,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:06,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:13:06,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033520423] [2021-02-19 20:13:06,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:13:06,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:06,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:13:06,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:13:06,787 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:13:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:11,829 INFO L93 Difference]: Finished difference Result 1709 states and 3422 transitions. [2021-02-19 20:13:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 20:13:11,831 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 33 [2021-02-19 20:13:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:11,832 INFO L225 Difference]: With dead ends: 1709 [2021-02-19 20:13:11,832 INFO L226 Difference]: Without dead ends: 1647 [2021-02-19 20:13:11,833 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=509, Invalid=4747, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 20:13:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-02-19 20:13:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1473. [2021-02-19 20:13:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.027173913043478) internal successors, (2984), 1472 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2984 transitions. [2021-02-19 20:13:11,852 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2984 transitions. Word has length 33 [2021-02-19 20:13:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:11,852 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 2984 transitions. [2021-02-19 20:13:11,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 20:13:11,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2984 transitions. [2021-02-19 20:13:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:11,853 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:11,853 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:12,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:13:12,054 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2032092506, now seen corresponding path program 113 times [2021-02-19 20:13:12,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:12,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282127653] [2021-02-19 20:13:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:12,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282127653] [2021-02-19 20:13:12,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747502112] [2021-02-19 20:13:12,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:13:12,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:13:12,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:13:12,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 20:13:12,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:13,233 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:13:13,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:13:13,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:13,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:13,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:13,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:13:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:13,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:13,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-02-19 20:13:13,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892390170] [2021-02-19 20:13:13,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:13:13,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:13:13,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:13:13,721 INFO L87 Difference]: Start difference. First operand 1473 states and 2984 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) [2021-02-19 20:13:18,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:18,011 INFO L93 Difference]: Finished difference Result 1663 states and 3329 transitions. [2021-02-19 20:13:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:13:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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 33 [2021-02-19 20:13:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:18,015 INFO L225 Difference]: With dead ends: 1663 [2021-02-19 20:13:18,015 INFO L226 Difference]: Without dead ends: 1575 [2021-02-19 20:13:18,016 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=361, Invalid=3545, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:13:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-02-19 20:13:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1495. [2021-02-19 20:13:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0254350736278446) internal successors, (3026), 1494 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3026 transitions. [2021-02-19 20:13:18,028 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3026 transitions. Word has length 33 [2021-02-19 20:13:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:18,028 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3026 transitions. [2021-02-19 20:13:18,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) [2021-02-19 20:13:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3026 transitions. [2021-02-19 20:13:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:18,030 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:18,030 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:18,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:13:18,230 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1390981916, now seen corresponding path program 114 times [2021-02-19 20:13:18,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:18,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044471963] [2021-02-19 20:13:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:18,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044471963] [2021-02-19 20:13:18,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530880353] [2021-02-19 20:13:18,867 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 [2021-02-19 20:13:18,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:13:18,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:13:18,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:18,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:19,274 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:13:19,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 20:13:19,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:19,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:19,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:19,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 20:13:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:19,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:19,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-02-19 20:13:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795610183] [2021-02-19 20:13:19,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:13:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:19,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:13:19,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:13:19,524 INFO L87 Difference]: Start difference. First operand 1495 states and 3026 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-02-19 20:13:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:22,939 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-02-19 20:13:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 20:13:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 33 [2021-02-19 20:13:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:22,943 INFO L225 Difference]: With dead ends: 1683 [2021-02-19 20:13:22,943 INFO L226 Difference]: Without dead ends: 1611 [2021-02-19 20:13:22,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=430, Invalid=3860, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 20:13:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-02-19 20:13:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1496. [2021-02-19 20:13:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-02-19 20:13:22,958 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-02-19 20:13:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:22,959 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-02-19 20:13:22,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-02-19 20:13:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-02-19 20:13:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:22,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:22,960 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:23,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:13:23,161 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1477743014, now seen corresponding path program 115 times [2021-02-19 20:13:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:23,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607825588] [2021-02-19 20:13:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:23,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607825588] [2021-02-19 20:13:23,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633618773] [2021-02-19 20:13:23,961 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 [2021-02-19 20:13:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:23,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:23,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:24,589 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:13:24,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:13:24,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:24,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:24,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:24,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 20:13:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:24,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:24,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-02-19 20:13:24,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456411631] [2021-02-19 20:13:24,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:13:24,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:24,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:13:24,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:13:24,967 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-02-19 20:13:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:29,458 INFO L93 Difference]: Finished difference Result 1719 states and 3451 transitions. [2021-02-19 20:13:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 20:13:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 33 [2021-02-19 20:13:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:29,463 INFO L225 Difference]: With dead ends: 1719 [2021-02-19 20:13:29,463 INFO L226 Difference]: Without dead ends: 1657 [2021-02-19 20:13:29,464 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 20:13:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-02-19 20:13:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1472. [2021-02-19 20:13:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-02-19 20:13:29,484 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-02-19 20:13:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:29,484 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-02-19 20:13:29,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-02-19 20:13:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-02-19 20:13:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:29,485 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:29,485 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:29,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 20:13:29,686 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:29,686 INFO L82 PathProgramCache]: Analyzing trace with hash 339707610, now seen corresponding path program 116 times [2021-02-19 20:13:29,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:29,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269527847] [2021-02-19 20:13:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:30,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269527847] [2021-02-19 20:13:30,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440780310] [2021-02-19 20:13:30,423 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 [2021-02-19 20:13:30,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:13:30,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:13:30,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:30,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:31,241 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:13:31,241 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 36 treesize of output 16 [2021-02-19 20:13:31,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:31,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:31,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:31,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:13:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:31,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:31,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:13:31,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066550885] [2021-02-19 20:13:31,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:13:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:13:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:13:31,652 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:34,940 INFO L93 Difference]: Finished difference Result 1608 states and 3221 transitions. [2021-02-19 20:13:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:13:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:13:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:34,943 INFO L225 Difference]: With dead ends: 1608 [2021-02-19 20:13:34,943 INFO L226 Difference]: Without dead ends: 1560 [2021-02-19 20:13:34,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 20:13:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-02-19 20:13:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1483. [2021-02-19 20:13:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.0276653171390016) internal successors, (3005), 1482 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3005 transitions. [2021-02-19 20:13:34,957 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3005 transitions. Word has length 33 [2021-02-19 20:13:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:34,957 INFO L480 AbstractCegarLoop]: Abstraction has 1483 states and 3005 transitions. [2021-02-19 20:13:34,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3005 transitions. [2021-02-19 20:13:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:34,958 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:34,958 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:35,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 20:13:35,173 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:35,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1619079324, now seen corresponding path program 117 times [2021-02-19 20:13:35,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:35,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292182625] [2021-02-19 20:13:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292182625] [2021-02-19 20:13:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767623390] [2021-02-19 20:13:35,623 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 [2021-02-19 20:13:35,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:13:35,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:13:35,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:36,174 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:13:36,174 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 36 treesize of output 16 [2021-02-19 20:13:36,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:36,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:36,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:36,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:13:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:36,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:36,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:13:36,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805832786] [2021-02-19 20:13:36,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:13:36,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:36,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:13:36,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:13:36,643 INFO L87 Difference]: Start difference. First operand 1483 states and 3005 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:39,707 INFO L93 Difference]: Finished difference Result 1645 states and 3288 transitions. [2021-02-19 20:13:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:13:39,710 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:13:39,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:39,712 INFO L225 Difference]: With dead ends: 1645 [2021-02-19 20:13:39,712 INFO L226 Difference]: Without dead ends: 1597 [2021-02-19 20:13:39,712 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 20:13:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-02-19 20:13:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1484. [2021-02-19 20:13:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0276466621712745) internal successors, (3007), 1483 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3007 transitions. [2021-02-19 20:13:39,725 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3007 transitions. Word has length 33 [2021-02-19 20:13:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:39,725 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 3007 transitions. [2021-02-19 20:13:39,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3007 transitions. [2021-02-19 20:13:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:39,726 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:39,726 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:39,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 20:13:39,927 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:39,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:39,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1290265382, now seen corresponding path program 118 times [2021-02-19 20:13:39,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:39,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570321498] [2021-02-19 20:13:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:40,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570321498] [2021-02-19 20:13:40,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350068666] [2021-02-19 20:13:40,686 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 [2021-02-19 20:13:40,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:13:40,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:13:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:40,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:41,271 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:13:41,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 20:13:41,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:41,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:41,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:41,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:13:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:41,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:41,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:13:41,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868401917] [2021-02-19 20:13:41,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:13:41,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:41,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:13:41,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:13:41,551 INFO L87 Difference]: Start difference. First operand 1484 states and 3007 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:45,002 INFO L93 Difference]: Finished difference Result 1683 states and 3366 transitions. [2021-02-19 20:13:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:13:45,006 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:13:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:45,008 INFO L225 Difference]: With dead ends: 1683 [2021-02-19 20:13:45,008 INFO L226 Difference]: Without dead ends: 1635 [2021-02-19 20:13:45,008 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 20:13:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-02-19 20:13:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1488. [2021-02-19 20:13:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.027572293207801) internal successors, (3015), 1487 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3015 transitions. [2021-02-19 20:13:45,021 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3015 transitions. Word has length 33 [2021-02-19 20:13:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:45,021 INFO L480 AbstractCegarLoop]: Abstraction has 1488 states and 3015 transitions. [2021-02-19 20:13:45,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3015 transitions. [2021-02-19 20:13:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:45,022 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:45,023 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:45,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:13:45,223 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1931375972, now seen corresponding path program 119 times [2021-02-19 20:13:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:45,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099640029] [2021-02-19 20:13:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:45,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099640029] [2021-02-19 20:13:45,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315045500] [2021-02-19 20:13:45,720 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 [2021-02-19 20:13:45,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:13:45,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:13:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:46,242 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:13:46,242 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 32 treesize of output 16 [2021-02-19 20:13:46,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:46,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:46,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:46,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:13:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:46,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:46,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:13:46,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700073499] [2021-02-19 20:13:46,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:13:46,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:46,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:13:46,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:13:46,604 INFO L87 Difference]: Start difference. First operand 1488 states and 3015 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:50,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:50,477 INFO L93 Difference]: Finished difference Result 1716 states and 3435 transitions. [2021-02-19 20:13:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 20:13:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:13:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:50,483 INFO L225 Difference]: With dead ends: 1716 [2021-02-19 20:13:50,483 INFO L226 Difference]: Without dead ends: 1684 [2021-02-19 20:13:50,483 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=252, Invalid=2504, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 20:13:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-02-19 20:13:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1489. [2021-02-19 20:13:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 2.02755376344086) internal successors, (3017), 1488 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 3017 transitions. [2021-02-19 20:13:50,497 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 3017 transitions. Word has length 33 [2021-02-19 20:13:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:50,497 INFO L480 AbstractCegarLoop]: Abstraction has 1489 states and 3017 transitions. [2021-02-19 20:13:50,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 3017 transitions. [2021-02-19 20:13:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:50,498 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:50,498 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:50,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 20:13:50,699 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash -505133606, now seen corresponding path program 120 times [2021-02-19 20:13:50,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:50,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504810523] [2021-02-19 20:13:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:51,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504810523] [2021-02-19 20:13:51,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275076008] [2021-02-19 20:13:51,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:13:51,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:13:51,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:13:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:52,235 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:13:52,235 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 36 treesize of output 16 [2021-02-19 20:13:52,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:52,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:52,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:52,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:13:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:52,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:52,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:13:52,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224057940] [2021-02-19 20:13:52,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:13:52,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:52,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:13:52,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:13:52,821 INFO L87 Difference]: Start difference. First operand 1489 states and 3017 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:13:57,336 INFO L93 Difference]: Finished difference Result 1787 states and 3573 transitions. [2021-02-19 20:13:57,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:13:57,339 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:13:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:13:57,341 INFO L225 Difference]: With dead ends: 1787 [2021-02-19 20:13:57,341 INFO L226 Difference]: Without dead ends: 1743 [2021-02-19 20:13:57,341 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:13:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-02-19 20:13:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1485. [2021-02-19 20:13:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.0256064690026956) internal successors, (3006), 1484 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:13:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3006 transitions. [2021-02-19 20:13:57,356 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3006 transitions. Word has length 33 [2021-02-19 20:13:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:13:57,356 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 3006 transitions. [2021-02-19 20:13:57,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:13:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3006 transitions. [2021-02-19 20:13:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:13:57,358 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:13:57,358 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:13:57,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:13:57,574 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:13:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:13:57,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1142849318, now seen corresponding path program 121 times [2021-02-19 20:13:57,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:13:57,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941564908] [2021-02-19 20:13:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:13:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:58,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941564908] [2021-02-19 20:13:58,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033457480] [2021-02-19 20:13:58,334 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 [2021-02-19 20:13:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:13:58,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:13:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:13:59,048 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:13:59,048 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 32 treesize of output 16 [2021-02-19 20:13:59,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:13:59,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:13:59,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:13:59,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:13:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:13:59,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:13:59,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:13:59,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580893622] [2021-02-19 20:13:59,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:13:59,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:13:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:13:59,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:13:59,729 INFO L87 Difference]: Start difference. First operand 1485 states and 3006 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:14:03,346 INFO L93 Difference]: Finished difference Result 1606 states and 3236 transitions. [2021-02-19 20:14:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:14:03,347 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:14:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:14:03,349 INFO L225 Difference]: With dead ends: 1606 [2021-02-19 20:14:03,349 INFO L226 Difference]: Without dead ends: 1578 [2021-02-19 20:14:03,349 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:14:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-02-19 20:14:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1477. [2021-02-19 20:14:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.0257452574525745) internal successors, (2990), 1476 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:14:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2990 transitions. [2021-02-19 20:14:03,362 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2990 transitions. Word has length 33 [2021-02-19 20:14:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:14:03,362 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 2990 transitions. [2021-02-19 20:14:03,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2990 transitions. [2021-02-19 20:14:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:14:03,363 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:14:03,363 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:14:03,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-02-19 20:14:03,574 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:14:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:14:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1333774488, now seen corresponding path program 122 times [2021-02-19 20:14:03,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:14:03,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012049473] [2021-02-19 20:14:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:14:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:14:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:04,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012049473] [2021-02-19 20:14:04,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668399608] [2021-02-19 20:14:04,089 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 [2021-02-19 20:14:04,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:14:04,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:14:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:14:04,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:14:04,847 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:14:04,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 20:14:04,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:14:04,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:14:04,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:14:04,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:14:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:05,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:14:05,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:14:05,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534017662] [2021-02-19 20:14:05,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:14:05,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:14:05,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:14:05,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:14:05,313 INFO L87 Difference]: Start difference. First operand 1477 states and 2990 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:14:09,760 INFO L93 Difference]: Finished difference Result 1650 states and 3303 transitions. [2021-02-19 20:14:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 20:14:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:14:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:14:09,766 INFO L225 Difference]: With dead ends: 1650 [2021-02-19 20:14:09,766 INFO L226 Difference]: Without dead ends: 1554 [2021-02-19 20:14:09,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:14:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-02-19 20:14:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1494. [2021-02-19 20:14:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.026791694574682) internal successors, (3026), 1493 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:14:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3026 transitions. [2021-02-19 20:14:09,779 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3026 transitions. Word has length 33 [2021-02-19 20:14:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:14:09,780 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3026 transitions. [2021-02-19 20:14:09,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3026 transitions. [2021-02-19 20:14:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:14:09,781 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:14:09,781 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:14:09,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-02-19 20:14:09,981 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:14:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:14:09,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1575570218, now seen corresponding path program 123 times [2021-02-19 20:14:09,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:14:09,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700250090] [2021-02-19 20:14:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:14:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:14:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:10,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700250090] [2021-02-19 20:14:10,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171502953] [2021-02-19 20:14:10,787 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 [2021-02-19 20:14:10,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:14:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:14:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:14:10,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:14:11,435 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:14:11,435 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 32 treesize of output 16 [2021-02-19 20:14:11,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:14:11,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:14:11,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:14:11,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:14:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:11,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:14:11,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:14:11,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762421129] [2021-02-19 20:14:11,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:14:11,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:14:11,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:14:11,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:14:11,723 INFO L87 Difference]: Start difference. First operand 1494 states and 3026 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:14,761 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-02-19 20:14:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:14:17,852 INFO L93 Difference]: Finished difference Result 1712 states and 3436 transitions. [2021-02-19 20:14:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:14:17,856 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:14:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:14:17,857 INFO L225 Difference]: With dead ends: 1712 [2021-02-19 20:14:17,857 INFO L226 Difference]: Without dead ends: 1617 [2021-02-19 20:14:17,858 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=386, Invalid=3904, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 20:14:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-02-19 20:14:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1503. [2021-02-19 20:14:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.026631158455393) internal successors, (3044), 1502 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:14:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3044 transitions. [2021-02-19 20:14:17,870 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3044 transitions. Word has length 33 [2021-02-19 20:14:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:14:17,871 INFO L480 AbstractCegarLoop]: Abstraction has 1503 states and 3044 transitions. [2021-02-19 20:14:17,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3044 transitions. [2021-02-19 20:14:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:14:17,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:14:17,872 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:14:18,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-02-19 20:14:18,074 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:14:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:14:18,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2078286488, now seen corresponding path program 124 times [2021-02-19 20:14:18,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:14:18,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563049994] [2021-02-19 20:14:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:14:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:14:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:18,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563049994] [2021-02-19 20:14:18,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978736147] [2021-02-19 20:14:18,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:14:18,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:14:18,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:14:18,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:14:18,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:14:19,696 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:14:19,697 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 32 treesize of output 16 [2021-02-19 20:14:19,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:14:19,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:14:19,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:14:19,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:14:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:20,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:14:20,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:14:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011641912] [2021-02-19 20:14:20,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:14:20,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:14:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:14:20,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:14:20,270 INFO L87 Difference]: Start difference. First operand 1503 states and 3044 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:23,157 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-02-19 20:14:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:14:26,414 INFO L93 Difference]: Finished difference Result 1736 states and 3481 transitions. [2021-02-19 20:14:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 20:14:26,417 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:14:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:14:26,419 INFO L225 Difference]: With dead ends: 1736 [2021-02-19 20:14:26,419 INFO L226 Difference]: Without dead ends: 1656 [2021-02-19 20:14:26,420 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=540, Invalid=4430, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:14:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-02-19 20:14:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1499. [2021-02-19 20:14:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0246995994659547) internal successors, (3033), 1498 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:14:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3033 transitions. [2021-02-19 20:14:26,434 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3033 transitions. Word has length 33 [2021-02-19 20:14:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:14:26,434 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 3033 transitions. [2021-02-19 20:14:26,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3033 transitions. [2021-02-19 20:14:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:14:26,435 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:14:26,435 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:14:26,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:14:26,638 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:14:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:14:26,638 INFO L82 PathProgramCache]: Analyzing trace with hash -790438442, now seen corresponding path program 125 times [2021-02-19 20:14:26,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:14:26,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388662237] [2021-02-19 20:14:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:14:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:14:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:27,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388662237] [2021-02-19 20:14:27,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080426538] [2021-02-19 20:14:27,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:14:27,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:14:27,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:14:27,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:14:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:14:28,310 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:14:28,310 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 32 treesize of output 16 [2021-02-19 20:14:28,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:14:28,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:14:28,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:14:28,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:14:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:28,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:14:28,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:14:28,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153342276] [2021-02-19 20:14:28,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:14:28,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:14:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:14:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:14:28,883 INFO L87 Difference]: Start difference. First operand 1499 states and 3033 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:31,227 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-02-19 20:14:31,708 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:14:32,177 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 20:14:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:14:36,843 INFO L93 Difference]: Finished difference Result 1806 states and 3621 transitions. [2021-02-19 20:14:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 20:14:36,846 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:14:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:14:36,848 INFO L225 Difference]: With dead ends: 1806 [2021-02-19 20:14:36,848 INFO L226 Difference]: Without dead ends: 1747 [2021-02-19 20:14:36,848 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=562, Invalid=4840, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 20:14:36,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-02-19 20:14:36,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1494. [2021-02-19 20:14:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:14:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-02-19 20:14:36,862 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-02-19 20:14:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:14:36,862 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-02-19 20:14:36,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-02-19 20:14:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:14:36,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:14:36,863 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:14:37,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:14:37,064 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:14:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:14:37,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1705071188, now seen corresponding path program 126 times [2021-02-19 20:14:37,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:14:37,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485192786] [2021-02-19 20:14:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:14:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:14:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485192786] [2021-02-19 20:14:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060336625] [2021-02-19 20:14:37,951 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 [2021-02-19 20:14:37,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:14:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:14:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:14:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:14:38,643 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:14:38,643 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 36 treesize of output 16 [2021-02-19 20:14:38,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:14:38,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:14:38,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:14:38,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:16 [2021-02-19 20:14:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:39,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:14:39,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:14:39,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714627165] [2021-02-19 20:14:39,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:14:39,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:14:39,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:14:39,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:14:39,085 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:41,147 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 20:14:41,332 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-02-19 20:14:42,180 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-02-19 20:14:42,504 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-02-19 20:14:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:14:45,768 INFO L93 Difference]: Finished difference Result 1678 states and 3369 transitions. [2021-02-19 20:14:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 20:14:45,771 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:14:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:14:45,773 INFO L225 Difference]: With dead ends: 1678 [2021-02-19 20:14:45,773 INFO L226 Difference]: Without dead ends: 1619 [2021-02-19 20:14:45,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=416, Invalid=4006, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:14:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-02-19 20:14:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1494. [2021-02-19 20:14:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:14:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-02-19 20:14:45,788 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-02-19 20:14:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:14:45,788 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-02-19 20:14:45,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-02-19 20:14:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:14:45,790 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:14:45,790 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:14:46,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:14:46,010 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:14:46,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:14:46,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1006459594, now seen corresponding path program 127 times [2021-02-19 20:14:46,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:14:46,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272209669] [2021-02-19 20:14:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:14:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:14:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:47,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272209669] [2021-02-19 20:14:47,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36421426] [2021-02-19 20:14:47,027 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 [2021-02-19 20:14:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:14:47,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:14:47,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:14:47,986 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:14:47,986 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 36 treesize of output 16 [2021-02-19 20:14:47,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:14:48,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:14:48,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:14:48,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:14:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:48,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:14:48,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:14:48,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746645623] [2021-02-19 20:14:48,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:14:48,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:14:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:14:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:14:48,458 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:51,133 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-02-19 20:14:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:14:53,523 INFO L93 Difference]: Finished difference Result 1719 states and 3443 transitions. [2021-02-19 20:14:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 20:14:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:14:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:14:53,529 INFO L225 Difference]: With dead ends: 1719 [2021-02-19 20:14:53,529 INFO L226 Difference]: Without dead ends: 1623 [2021-02-19 20:14:53,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 20:14:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-02-19 20:14:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1538. [2021-02-19 20:14:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.0286271958360445) internal successors, (3118), 1537 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:14:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3118 transitions. [2021-02-19 20:14:53,544 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3118 transitions. Word has length 33 [2021-02-19 20:14:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:14:53,544 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 3118 transitions. [2021-02-19 20:14:53,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3118 transitions. [2021-02-19 20:14:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:14:53,546 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:14:53,546 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:14:53,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-02-19 20:14:53,746 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:14:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:14:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1902885112, now seen corresponding path program 128 times [2021-02-19 20:14:53,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:14:53,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109549662] [2021-02-19 20:14:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:14:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:14:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:54,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109549662] [2021-02-19 20:14:54,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597765482] [2021-02-19 20:14:54,772 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 [2021-02-19 20:14:54,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:14:54,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:14:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:14:54,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:14:55,745 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:14:55,745 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 36 treesize of output 16 [2021-02-19 20:14:55,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:14:55,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:14:55,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:14:55,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:14:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:14:56,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:14:56,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:14:56,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104019447] [2021-02-19 20:14:56,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:14:56,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:14:56,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:14:56,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:14:56,231 INFO L87 Difference]: Start difference. First operand 1538 states and 3118 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:14:59,094 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 20:15:02,377 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-02-19 20:15:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:03,552 INFO L93 Difference]: Finished difference Result 1837 states and 3695 transitions. [2021-02-19 20:15:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 20:15:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:15:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:03,559 INFO L225 Difference]: With dead ends: 1837 [2021-02-19 20:15:03,559 INFO L226 Difference]: Without dead ends: 1735 [2021-02-19 20:15:03,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=453, Invalid=4517, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:15:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-02-19 20:15:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1580. [2021-02-19 20:15:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 2.031665611146295) internal successors, (3208), 1579 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3208 transitions. [2021-02-19 20:15:03,575 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3208 transitions. Word has length 33 [2021-02-19 20:15:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:03,576 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 3208 transitions. [2021-02-19 20:15:03,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:15:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3208 transitions. [2021-02-19 20:15:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:15:03,577 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:03,577 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:03,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:03,778 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:03,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1750971594, now seen corresponding path program 129 times [2021-02-19 20:15:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:03,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581476068] [2021-02-19 20:15:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:04,205 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-02-19 20:15:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:04,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581476068] [2021-02-19 20:15:04,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048217985] [2021-02-19 20:15:04,903 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 [2021-02-19 20:15:04,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:15:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:15:04,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:05,770 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:15:05,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 20:15:05,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:05,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:05,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:05,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:15:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:06,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:06,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:15:06,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228717035] [2021-02-19 20:15:06,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:15:06,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:15:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:15:06,440 INFO L87 Difference]: Start difference. First operand 1580 states and 3208 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:15:11,572 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-02-19 20:15:12,258 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2021-02-19 20:15:13,795 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 20:15:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:16,821 INFO L93 Difference]: Finished difference Result 1994 states and 4027 transitions. [2021-02-19 20:15:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:15:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:15:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:16,828 INFO L225 Difference]: With dead ends: 1994 [2021-02-19 20:15:16,828 INFO L226 Difference]: Without dead ends: 1895 [2021-02-19 20:15:16,829 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=766, Invalid=7066, Unknown=0, NotChecked=0, Total=7832 [2021-02-19 20:15:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-02-19 20:15:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1605. [2021-02-19 20:15:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 2.0311720698254363) internal successors, (3258), 1604 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 3258 transitions. [2021-02-19 20:15:16,844 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 3258 transitions. Word has length 33 [2021-02-19 20:15:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:16,844 INFO L480 AbstractCegarLoop]: Abstraction has 1605 states and 3258 transitions. [2021-02-19 20:15:16,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:15:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 3258 transitions. [2021-02-19 20:15:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:15:16,846 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:16,846 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:17,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-02-19 20:15:17,050 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:17,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1117753336, now seen corresponding path program 130 times [2021-02-19 20:15:17,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:17,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271960237] [2021-02-19 20:15:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:18,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271960237] [2021-02-19 20:15:18,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016067858] [2021-02-19 20:15:18,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:15:18,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:15:18,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:15:18,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:18,985 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:15:18,985 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 36 treesize of output 16 [2021-02-19 20:15:18,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:19,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:19,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:19,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:15:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:19,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:19,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:15:19,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913807203] [2021-02-19 20:15:19,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:15:19,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:19,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:15:19,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:15:19,652 INFO L87 Difference]: Start difference. First operand 1605 states and 3258 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:15:24,435 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 20:15:24,663 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 20:15:26,435 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-02-19 20:15:26,909 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-02-19 20:15:27,400 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-02-19 20:15:29,286 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-02-19 20:15:31,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:31,700 INFO L93 Difference]: Finished difference Result 2110 states and 4259 transitions. [2021-02-19 20:15:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 20:15:31,705 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:15:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:31,707 INFO L225 Difference]: With dead ends: 2110 [2021-02-19 20:15:31,707 INFO L226 Difference]: Without dead ends: 2048 [2021-02-19 20:15:31,708 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=807, Invalid=7749, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 20:15:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-02-19 20:15:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1696. [2021-02-19 20:15:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.033628318584071) internal successors, (3447), 1695 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 3447 transitions. [2021-02-19 20:15:31,725 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 3447 transitions. Word has length 33 [2021-02-19 20:15:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:31,725 INFO L480 AbstractCegarLoop]: Abstraction has 1696 states and 3447 transitions. [2021-02-19 20:15:31,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:15:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 3447 transitions. [2021-02-19 20:15:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:15:31,727 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:31,727 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:31,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:31,928 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2032386082, now seen corresponding path program 131 times [2021-02-19 20:15:31,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:31,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831696972] [2021-02-19 20:15:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:32,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831696972] [2021-02-19 20:15:32,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164009827] [2021-02-19 20:15:32,632 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 [2021-02-19 20:15:32,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:15:32,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:15:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:33,141 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:15:33,142 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 32 treesize of output 16 [2021-02-19 20:15:33,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:33,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:33,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:33,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:15:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:33,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:33,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:15:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670258367] [2021-02-19 20:15:33,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:15:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:15:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:15:33,559 INFO L87 Difference]: Start difference. First operand 1696 states and 3447 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:15:36,672 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 20:15:37,962 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-02-19 20:15:38,348 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-02-19 20:15:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:41,429 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-02-19 20:15:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 20:15:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:15:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:41,434 INFO L225 Difference]: With dead ends: 1992 [2021-02-19 20:15:41,434 INFO L226 Difference]: Without dead ends: 1936 [2021-02-19 20:15:41,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=417, Invalid=3873, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 20:15:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-02-19 20:15:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1752. [2021-02-19 20:15:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.031410622501428) internal successors, (3557), 1751 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3557 transitions. [2021-02-19 20:15:41,453 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3557 transitions. Word has length 33 [2021-02-19 20:15:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:41,453 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 3557 transitions. [2021-02-19 20:15:41,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:15:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3557 transitions. [2021-02-19 20:15:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:15:41,455 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:41,455 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:41,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:41,662 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2028969804, now seen corresponding path program 132 times [2021-02-19 20:15:41,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:41,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936185278] [2021-02-19 20:15:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:42,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936185278] [2021-02-19 20:15:42,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344355765] [2021-02-19 20:15:42,392 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 [2021-02-19 20:15:42,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:15:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:42,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 20:15:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:43,274 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:15:43,274 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 36 treesize of output 16 [2021-02-19 20:15:43,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:43,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:43,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:43,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:16 [2021-02-19 20:15:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:43,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:43,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-02-19 20:15:43,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579983129] [2021-02-19 20:15:43,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:15:43,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:15:43,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:15:43,630 INFO L87 Difference]: Start difference. First operand 1752 states and 3557 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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) [2021-02-19 20:15:45,532 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 20:15:46,021 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 20:15:47,282 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-02-19 20:15:48,334 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-02-19 20:15:49,194 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:15:49,925 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 20:15:51,523 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 20:15:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:52,963 INFO L93 Difference]: Finished difference Result 2256 states and 4557 transitions. [2021-02-19 20:15:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 20:15:52,965 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 33 [2021-02-19 20:15:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:52,967 INFO L225 Difference]: With dead ends: 2256 [2021-02-19 20:15:52,967 INFO L226 Difference]: Without dead ends: 2168 [2021-02-19 20:15:52,968 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=525, Invalid=5481, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 20:15:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-02-19 20:15:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1988. [2021-02-19 20:15:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.030699547055863) internal successors, (4035), 1987 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4035 transitions. [2021-02-19 20:15:52,983 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4035 transitions. Word has length 33 [2021-02-19 20:15:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:52,983 INFO L480 AbstractCegarLoop]: Abstraction has 1988 states and 4035 transitions. [2021-02-19 20:15:52,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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) [2021-02-19 20:15:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4035 transitions. [2021-02-19 20:15:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:15:52,985 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:52,985 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:53,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:53,186 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:53,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1624886902, now seen corresponding path program 133 times [2021-02-19 20:15:53,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:53,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113820522] [2021-02-19 20:15:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:53,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113820522] [2021-02-19 20:15:53,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494211617] [2021-02-19 20:15:53,854 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 [2021-02-19 20:15:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:53,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:15:53,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:54,452 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:15:54,453 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 32 treesize of output 16 [2021-02-19 20:15:54,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:54,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:54,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:54,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:15:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:55,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:55,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:15:55,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095560147] [2021-02-19 20:15:55,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:15:55,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:55,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:15:55,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:15:55,027 INFO L87 Difference]: Start difference. First operand 1988 states and 4035 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:15:56,761 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 20:15:58,437 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 20:15:59,409 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 20:15:59,591 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-02-19 20:16:00,210 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 20:16:00,393 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-02-19 20:16:01,067 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:16:02,067 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 20:16:02,283 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-02-19 20:16:02,890 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 20:16:03,396 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:16:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:05,146 INFO L93 Difference]: Finished difference Result 2485 states and 5053 transitions. [2021-02-19 20:16:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:16:05,148 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:16:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:05,151 INFO L225 Difference]: With dead ends: 2485 [2021-02-19 20:16:05,151 INFO L226 Difference]: Without dead ends: 2405 [2021-02-19 20:16:05,152 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=672, Invalid=6984, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 20:16:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-02-19 20:16:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1662. [2021-02-19 20:16:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.033112582781457) internal successors, (3377), 1661 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3377 transitions. [2021-02-19 20:16:05,179 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3377 transitions. Word has length 33 [2021-02-19 20:16:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:05,179 INFO L480 AbstractCegarLoop]: Abstraction has 1662 states and 3377 transitions. [2021-02-19 20:16:05,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:16:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3377 transitions. [2021-02-19 20:16:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:16:05,181 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:05,181 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:05,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-02-19 20:16:05,396 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1243838028, now seen corresponding path program 134 times [2021-02-19 20:16:05,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:05,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012474271] [2021-02-19 20:16:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:06,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012474271] [2021-02-19 20:16:06,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447214848] [2021-02-19 20:16:06,139 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 [2021-02-19 20:16:06,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:16:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:06,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:16:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:06,958 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:16:06,958 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 36 treesize of output 16 [2021-02-19 20:16:06,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:06,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:06,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:06,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 20:16:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:07,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:07,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:16:07,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469742661] [2021-02-19 20:16:07,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:16:07,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:07,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:16:07,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:16:07,610 INFO L87 Difference]: Start difference. First operand 1662 states and 3377 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:16:09,324 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 20:16:09,931 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 20:16:11,079 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 20:16:11,461 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 20:16:11,624 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-02-19 20:16:12,308 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-02-19 20:16:12,559 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 20:16:12,733 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-02-19 20:16:13,647 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-02-19 20:16:14,322 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:16:16,645 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 20:16:16,863 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-02-19 20:16:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:18,615 INFO L93 Difference]: Finished difference Result 2226 states and 4483 transitions. [2021-02-19 20:16:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 20:16:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-02-19 20:16:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:18,621 INFO L225 Difference]: With dead ends: 2226 [2021-02-19 20:16:18,621 INFO L226 Difference]: Without dead ends: 2170 [2021-02-19 20:16:18,622 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=763, Invalid=7793, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 20:16:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-02-19 20:16:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1536. [2021-02-19 20:16:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.0273615635179154) internal successors, (3112), 1535 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3112 transitions. [2021-02-19 20:16:18,637 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3112 transitions. Word has length 33 [2021-02-19 20:16:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:18,637 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 3112 transitions. [2021-02-19 20:16:18,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:16:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3112 transitions. [2021-02-19 20:16:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:16:18,638 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:18,638 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:18,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:18,839 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:18,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:18,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1348684646, now seen corresponding path program 135 times [2021-02-19 20:16:18,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:18,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127360236] [2021-02-19 20:16:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127360236] [2021-02-19 20:16:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405398022] [2021-02-19 20:16:20,007 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 [2021-02-19 20:16:20,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:16:20,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:16:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:20,893 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:16:20,894 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 32 treesize of output 16 [2021-02-19 20:16:20,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:20,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:20,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:20,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 20:16:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:21,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:21,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 20:16:21,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672807085] [2021-02-19 20:16:21,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:16:21,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:16:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:16:21,747 INFO L87 Difference]: Start difference. First operand 1536 states and 3112 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-02-19 20:16:23,952 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 20:16:24,518 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 20:16:25,386 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 20:16:26,066 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-02-19 20:16:27,013 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 Received shutdown request... [2021-02-19 20:16:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 20:16:29,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-02-19 20:16:29,640 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:16:29,644 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:16:29,644 INFO L202 PluginConnector]: Adding new model queue-add-2-IKG.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:16:29 BasicIcfg [2021-02-19 20:16:29,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:16:29,645 INFO L168 Benchmark]: Toolchain (without parser) took 544176.03 ms. Allocated memory was 255.9 MB in the beginning and 450.9 MB in the end (delta: 195.0 MB). Free memory was 236.7 MB in the beginning and 331.9 MB in the end (delta: -95.2 MB). Peak memory consumption was 100.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:16:29,645 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:16:29,645 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.39 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:16:29,645 INFO L168 Benchmark]: Boogie Preprocessor took 18.17 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 976.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:16:29,645 INFO L168 Benchmark]: RCFGBuilder took 322.62 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 236.8 MB in the end (delta: -3.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. [2021-02-19 20:16:29,645 INFO L168 Benchmark]: TraceAbstraction took 543797.84 ms. Allocated memory was 255.9 MB in the beginning and 450.9 MB in the end (delta: 195.0 MB). Free memory was 236.4 MB in the beginning and 331.9 MB in the end (delta: -95.6 MB). Peak memory consumption was 98.3 MB. Max. memory is 16.0 GB. [2021-02-19 20:16:29,645 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 0.23 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.39 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.17 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 976.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 322.62 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 236.8 MB in the end (delta: -3.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 543797.84 ms. Allocated memory was 255.9 MB in the beginning and 450.9 MB in the end (delta: 195.0 MB). Free memory was 236.4 MB in the beginning and 331.9 MB in the end (delta: -95.6 MB). Peak memory consumption was 98.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while BasicCegarLoop was constructing difference of abstraction (1536states) and FLOYD_HOARE automaton (currently 44 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (1427 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 543.7s, OverallIterations: 139, TraceHistogramMax: 3, AutomataDifference: 373.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6783 SDtfs, 20386 SDslu, 85915 SDs, 0 SdLazy, 187131 SolverSat, 9258 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10556 GetRequests, 2587 SyntacticMatches, 347 SemanticMatches, 7622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136156 ImplicationChecksByTransitivity, 303.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1988occurred in iteration=136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 138 MinimizatonAttempts, 21075 StatesRemovedByMinimization, 137 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 136.4s InterpolantComputationTime, 8725 NumberOfCodeBlocks, 8725 NumberOfCodeBlocksAsserted, 431 NumberOfCheckSat, 8449 ConstructedInterpolants, 458 QuantifiedInterpolants, 4093526 SizeOfPredicates, 1165 NumberOfNonLiveVariables, 9592 ConjunctsInSsa, 4308 ConjunctsInUnsatCore, 276 InterpolantComputations, 2 PerfectInterpolantSequences, 41/4869 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown