/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-more/dec-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:57:14,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:57:14,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:57:14,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:57:14,554 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 18:57:14,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:57:14,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:57:14,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:57:14,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:57:14,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:57:14,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:57:14,590 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:57:14,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:57:14,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:57:14,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:57:14,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:57:14,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:57:14,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:57:14,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:57:14,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:57:14,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:57:14,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:57:14,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:57:14,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:57:14,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:57:14,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:57:14,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:57:14,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:57:14,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:57:14,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:57:14,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:57:14,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:57:14,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:57:14,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:57:14,593 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:57:14,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:57:14,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:57:14,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:57:14,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:57:14,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:57:14,920 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:57:14,921 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:57:14,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl [2021-02-19 18:57:14,922 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl' [2021-02-19 18:57:14,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:57:14,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:57:14,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:57:14,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:57:14,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:57:14,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:14,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:14,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:57:14,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:57:14,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:57:14,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:57:14,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:14,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:14,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:14,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:14,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:15,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:15,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/1) ... [2021-02-19 18:57:15,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:57:15,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:57:15,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:57:15,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:57:15,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (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 18:57:15,056 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:57:15,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:57:15,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:57:15,057 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:57:15,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:57:15,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:57:15,057 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:57:15,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:57:15,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:57:15,058 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 18:57:15,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:57:15,239 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:57:15,240 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:57:15 BoogieIcfgContainer [2021-02-19 18:57:15,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:57:15,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:57:15,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:57:15,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:57:15,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:57:14" (1/2) ... [2021-02-19 18:57:15,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79185270 and model type dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:57:15, skipping insertion in model container [2021-02-19 18:57:15,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:57:15" (2/2) ... [2021-02-19 18:57:15,246 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq.wvr.bpl [2021-02-19 18:57:15,250 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:57:15,250 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:57:15,252 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:57:15,253 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:57:15,304 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 18:57:15,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 18:57:15,333 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:57:15,334 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:57:15,334 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:57:15,334 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:57:15,334 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:57:15,334 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:57:15,334 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:57:15,334 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:57:15,346 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-02-19 18:57:15,362 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 18:57:15,371 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:15,371 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:15,372 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash 733754707, now seen corresponding path program 1 times [2021-02-19 18:57:15,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:15,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798861079] [2021-02-19 18:57:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:15,538 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 18:57:15,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798861079] [2021-02-19 18:57:15,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:57:15,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:57:15,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728205766] [2021-02-19 18:57:15,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:57:15,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:15,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:57:15,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:57:15,561 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:15,593 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-02-19 18:57:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:57:15,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 18:57:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:15,605 INFO L225 Difference]: With dead ends: 104 [2021-02-19 18:57:15,605 INFO L226 Difference]: Without dead ends: 87 [2021-02-19 18:57:15,607 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 18:57:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-19 18:57:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-02-19 18:57:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-02-19 18:57:15,652 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-02-19 18:57:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:15,653 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-02-19 18:57:15,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-02-19 18:57:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:57:15,654 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:15,654 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:15,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:57:15,655 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:15,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:15,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1701562832, now seen corresponding path program 1 times [2021-02-19 18:57:15,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:15,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068334735] [2021-02-19 18:57:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:15,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068334735] [2021-02-19 18:57:15,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:57:15,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:57:15,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089088725] [2021-02-19 18:57:15,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:57:15,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:15,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:57:15,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:57:15,724 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:15,753 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-02-19 18:57:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:57:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 18:57:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:15,756 INFO L225 Difference]: With dead ends: 91 [2021-02-19 18:57:15,756 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 18:57:15,757 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:57:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 18:57:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-02-19 18:57:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-02-19 18:57:15,763 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-02-19 18:57:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:15,763 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-02-19 18:57:15,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-02-19 18:57:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:57:15,764 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:15,765 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, 1] [2021-02-19 18:57:15,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:57:15,765 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash -586004584, now seen corresponding path program 1 times [2021-02-19 18:57:15,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:15,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704384944] [2021-02-19 18:57:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:15,938 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 18:57:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704384944] [2021-02-19 18:57:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536475081] [2021-02-19 18:57:15,939 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 18:57:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:15,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:57:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:16,193 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 13 treesize of output 9 [2021-02-19 18:57:16,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:16,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:16,206 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 18:57:16,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-02-19 18:57:16,236 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 18:57:16,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:16,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:16,242 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 18:57:16,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-02-19 18:57:16,257 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 18:57:16,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:16,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-02-19 18:57:16,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101654944] [2021-02-19 18:57:16,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:57:16,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:16,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:57:16,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:57:16,259 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:16,368 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-02-19 18:57:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:57:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:57:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:16,370 INFO L225 Difference]: With dead ends: 154 [2021-02-19 18:57:16,370 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 18:57:16,370 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:57:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 18:57:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-02-19 18:57:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-02-19 18:57:16,380 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-02-19 18:57:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:16,380 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-02-19 18:57:16,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-02-19 18:57:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:57:16,382 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:16,382 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, 1] [2021-02-19 18:57:16,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 18:57:16,598 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1302487563, now seen corresponding path program 2 times [2021-02-19 18:57:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:16,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514922052] [2021-02-19 18:57:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:16,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514922052] [2021-02-19 18:57:16,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631488809] [2021-02-19 18:57:16,648 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 18:57:16,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:57:16,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:57:16,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:16,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:16,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-02-19 18:57:16,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001951537] [2021-02-19 18:57:16,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:57:16,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:57:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:57:16,770 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 18:57:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:16,852 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-02-19 18:57:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:57:16,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 27 [2021-02-19 18:57:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:16,854 INFO L225 Difference]: With dead ends: 284 [2021-02-19 18:57:16,854 INFO L226 Difference]: Without dead ends: 264 [2021-02-19 18:57:16,855 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:57:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-02-19 18:57:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-02-19 18:57:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-02-19 18:57:16,868 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-02-19 18:57:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:16,868 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-02-19 18:57:16,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 18:57:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-02-19 18:57:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:57:16,870 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:16,870 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:17,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:17,092 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:17,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2079891853, now seen corresponding path program 3 times [2021-02-19 18:57:17,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:17,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417133402] [2021-02-19 18:57:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:17,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417133402] [2021-02-19 18:57:17,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639930362] [2021-02-19 18:57:17,394 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 18:57:17,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:57:17,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:17,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:57:17,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:17,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:17,607 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 27 [2021-02-19 18:57:17,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:17,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:17,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:17,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:40, output treesize:26 [2021-02-19 18:57:17,741 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:57:17,741 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 26 treesize of output 10 [2021-02-19 18:57:17,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:17,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:17,748 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 18:57:17,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:5 [2021-02-19 18:57:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:17,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:17,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-02-19 18:57:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545994855] [2021-02-19 18:57:17,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:57:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:57:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:57:17,764 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:18,390 INFO L93 Difference]: Finished difference Result 365 states and 763 transitions. [2021-02-19 18:57:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:57:18,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:57:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:18,393 INFO L225 Difference]: With dead ends: 365 [2021-02-19 18:57:18,393 INFO L226 Difference]: Without dead ends: 348 [2021-02-19 18:57:18,394 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:57:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-02-19 18:57:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 262. [2021-02-19 18:57:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.1226053639846745) internal successors, (554), 261 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 554 transitions. [2021-02-19 18:57:18,420 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 554 transitions. Word has length 32 [2021-02-19 18:57:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:18,421 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 554 transitions. [2021-02-19 18:57:18,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 554 transitions. [2021-02-19 18:57:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:57:18,422 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:18,423 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:18,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:18,623 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1255639629, now seen corresponding path program 4 times [2021-02-19 18:57:18,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:18,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214205830] [2021-02-19 18:57:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:57:18,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214205830] [2021-02-19 18:57:18,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081430187] [2021-02-19 18:57:18,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:18,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:57:18,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:57:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:19,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:19,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-02-19 18:57:19,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:19,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:19,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:19,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-02-19 18:57:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:19,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:19,413 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 24 treesize of output 10 [2021-02-19 18:57:19,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:19,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:19,423 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 18:57:19,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-02-19 18:57:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:19,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:19,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-02-19 18:57:19,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487975948] [2021-02-19 18:57:19,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:57:19,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:19,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:57:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:57:19,443 INFO L87 Difference]: Start difference. First operand 262 states and 554 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:20,209 INFO L93 Difference]: Finished difference Result 743 states and 1526 transitions. [2021-02-19 18:57:20,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:57:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:57:20,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:20,212 INFO L225 Difference]: With dead ends: 743 [2021-02-19 18:57:20,213 INFO L226 Difference]: Without dead ends: 598 [2021-02-19 18:57:20,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:57:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-02-19 18:57:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 283. [2021-02-19 18:57:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1099290780141846) internal successors, (595), 282 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 595 transitions. [2021-02-19 18:57:20,225 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 595 transitions. Word has length 32 [2021-02-19 18:57:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:20,226 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 595 transitions. [2021-02-19 18:57:20,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 595 transitions. [2021-02-19 18:57:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:57:20,231 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:20,231 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:20,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:20,442 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:20,443 INFO L82 PathProgramCache]: Analyzing trace with hash 220458333, now seen corresponding path program 5 times [2021-02-19 18:57:20,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:20,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155966231] [2021-02-19 18:57:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:20,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155966231] [2021-02-19 18:57:20,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277451892] [2021-02-19 18:57:20,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:20,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:57:20,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:57:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:20,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:20,977 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 24 treesize of output 24 [2021-02-19 18:57:20,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:20,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:20,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:20,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-02-19 18:57:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:21,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:21,133 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 22 treesize of output 10 [2021-02-19 18:57:21,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:21,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:21,148 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 18:57:21,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-02-19 18:57:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:21,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:21,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-02-19 18:57:21,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655909894] [2021-02-19 18:57:21,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:57:21,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:21,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:57:21,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:57:21,164 INFO L87 Difference]: Start difference. First operand 283 states and 595 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:22,066 INFO L93 Difference]: Finished difference Result 805 states and 1652 transitions. [2021-02-19 18:57:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:57:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:57:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:22,070 INFO L225 Difference]: With dead ends: 805 [2021-02-19 18:57:22,070 INFO L226 Difference]: Without dead ends: 651 [2021-02-19 18:57:22,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:57:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-02-19 18:57:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 293. [2021-02-19 18:57:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.113013698630137) internal successors, (617), 292 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 617 transitions. [2021-02-19 18:57:22,083 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 617 transitions. Word has length 32 [2021-02-19 18:57:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:22,084 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 617 transitions. [2021-02-19 18:57:22,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 617 transitions. [2021-02-19 18:57:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:57:22,085 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:22,085 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:22,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-02-19 18:57:22,302 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2088791475, now seen corresponding path program 6 times [2021-02-19 18:57:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:22,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104368960] [2021-02-19 18:57:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:57:22,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104368960] [2021-02-19 18:57:22,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374316548] [2021-02-19 18:57:22,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:57:22,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:57:22,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:57:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:22,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:22,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-02-19 18:57:22,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:22,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:22,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:22,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-02-19 18:57:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:23,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:23,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:23,004 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 24 treesize of output 10 [2021-02-19 18:57:23,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:23,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:23,013 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 18:57:23,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-02-19 18:57:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:23,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:23,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-02-19 18:57:23,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133207254] [2021-02-19 18:57:23,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:57:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:57:23,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:57:23,032 INFO L87 Difference]: Start difference. First operand 293 states and 617 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:23,646 INFO L93 Difference]: Finished difference Result 798 states and 1655 transitions. [2021-02-19 18:57:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:57:23,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:57:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:23,650 INFO L225 Difference]: With dead ends: 798 [2021-02-19 18:57:23,650 INFO L226 Difference]: Without dead ends: 688 [2021-02-19 18:57:23,651 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:57:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-02-19 18:57:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 322. [2021-02-19 18:57:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.1090342679127727) internal successors, (677), 321 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 677 transitions. [2021-02-19 18:57:23,665 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 677 transitions. Word has length 32 [2021-02-19 18:57:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:23,665 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 677 transitions. [2021-02-19 18:57:23,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 677 transitions. [2021-02-19 18:57:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:57:23,666 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:23,666 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:23,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:23,882 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:23,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:23,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2026164045, now seen corresponding path program 7 times [2021-02-19 18:57:23,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:23,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257829389] [2021-02-19 18:57:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:24,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257829389] [2021-02-19 18:57:24,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432302020] [2021-02-19 18:57:24,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:57:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:57:24,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:24,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:24,443 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 26 treesize of output 26 [2021-02-19 18:57:24,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:24,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:24,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:24,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-02-19 18:57:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:24,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:24,575 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 24 treesize of output 10 [2021-02-19 18:57:24,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:24,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:24,585 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 18:57:24,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-02-19 18:57:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:24,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:24,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-02-19 18:57:24,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067567406] [2021-02-19 18:57:24,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:57:24,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:24,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:57:24,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:57:24,601 INFO L87 Difference]: Start difference. First operand 322 states and 677 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:25,254 INFO L93 Difference]: Finished difference Result 842 states and 1752 transitions. [2021-02-19 18:57:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:57:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:57:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:25,257 INFO L225 Difference]: With dead ends: 842 [2021-02-19 18:57:25,257 INFO L226 Difference]: Without dead ends: 744 [2021-02-19 18:57:25,258 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:57:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-02-19 18:57:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 353. [2021-02-19 18:57:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.0994318181818183) internal successors, (739), 352 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 739 transitions. [2021-02-19 18:57:25,272 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 739 transitions. Word has length 32 [2021-02-19 18:57:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:25,272 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 739 transitions. [2021-02-19 18:57:25,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 739 transitions. [2021-02-19 18:57:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 18:57:25,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:25,273 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:25,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:25,496 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1642853738, now seen corresponding path program 8 times [2021-02-19 18:57:25,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:25,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785681704] [2021-02-19 18:57:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:25,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785681704] [2021-02-19 18:57:25,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552247614] [2021-02-19 18:57:25,567 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 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 18:57:25,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:57:25,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:25,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:57:25,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:25,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:25,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-02-19 18:57:25,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886038519] [2021-02-19 18:57:25,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:57:25,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:57:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:57:25,669 INFO L87 Difference]: Start difference. First operand 353 states and 739 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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 18:57:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:25,756 INFO L93 Difference]: Finished difference Result 642 states and 1337 transitions. [2021-02-19 18:57:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:57:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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 36 [2021-02-19 18:57:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:25,760 INFO L225 Difference]: With dead ends: 642 [2021-02-19 18:57:25,761 INFO L226 Difference]: Without dead ends: 610 [2021-02-19 18:57:25,761 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:57:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-02-19 18:57:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 475. [2021-02-19 18:57:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 2.128691983122363) internal successors, (1009), 474 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1009 transitions. [2021-02-19 18:57:25,777 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1009 transitions. Word has length 36 [2021-02-19 18:57:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:25,777 INFO L480 AbstractCegarLoop]: Abstraction has 475 states and 1009 transitions. [2021-02-19 18:57:25,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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 18:57:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1009 transitions. [2021-02-19 18:57:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:57:25,779 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:25,779 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:25,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:57:25,990 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash 513768658, now seen corresponding path program 9 times [2021-02-19 18:57:25,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:25,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906467005] [2021-02-19 18:57:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:26,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906467005] [2021-02-19 18:57:26,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25490756] [2021-02-19 18:57:26,421 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 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 18:57:26,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:57:26,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:57:26,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:26,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:26,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-02-19 18:57:26,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:26,856 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.4 percent of original size [2021-02-19 18:57:26,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:26,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:57 [2021-02-19 18:57:27,116 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-02-19 18:57:27,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2021-02-19 18:57:27,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:27,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:27,134 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 18:57:27,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:5 [2021-02-19 18:57:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:27,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:27,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-02-19 18:57:27,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138678929] [2021-02-19 18:57:27,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:57:27,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:27,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:57:27,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:57:27,154 INFO L87 Difference]: Start difference. First operand 475 states and 1009 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:29,243 INFO L93 Difference]: Finished difference Result 1495 states and 3156 transitions. [2021-02-19 18:57:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:57:29,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:57:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:29,249 INFO L225 Difference]: With dead ends: 1495 [2021-02-19 18:57:29,249 INFO L226 Difference]: Without dead ends: 1343 [2021-02-19 18:57:29,250 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=529, Invalid=3761, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:57:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-02-19 18:57:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 537. [2021-02-19 18:57:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.128731343283582) internal successors, (1141), 536 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1141 transitions. [2021-02-19 18:57:29,267 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1141 transitions. Word has length 41 [2021-02-19 18:57:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:29,267 INFO L480 AbstractCegarLoop]: Abstraction has 537 states and 1141 transitions. [2021-02-19 18:57:29,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1141 transitions. [2021-02-19 18:57:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:57:29,269 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:29,269 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:29,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:29,491 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash -314905006, now seen corresponding path program 10 times [2021-02-19 18:57:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:29,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492729119] [2021-02-19 18:57:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:57:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492729119] [2021-02-19 18:57:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869837564] [2021-02-19 18:57:29,854 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:29,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:57:29,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:29,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:57:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:30,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:30,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-02-19 18:57:30,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:30,682 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-02-19 18:57:30,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:30,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-02-19 18:57:30,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:30,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:30,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:30,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-02-19 18:57:30,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:30,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:30,797 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 18:57:30,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-02-19 18:57:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:30,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:30,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-02-19 18:57:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669622612] [2021-02-19 18:57:30,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 18:57:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 18:57:30,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:57:30,819 INFO L87 Difference]: Start difference. First operand 537 states and 1141 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:33,040 INFO L93 Difference]: Finished difference Result 1767 states and 3693 transitions. [2021-02-19 18:57:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 18:57:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:57:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:33,047 INFO L225 Difference]: With dead ends: 1767 [2021-02-19 18:57:33,047 INFO L226 Difference]: Without dead ends: 1610 [2021-02-19 18:57:33,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:57:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-02-19 18:57:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 636. [2021-02-19 18:57:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.1181102362204722) internal successors, (1345), 635 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1345 transitions. [2021-02-19 18:57:33,068 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1345 transitions. Word has length 41 [2021-02-19 18:57:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:33,068 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1345 transitions. [2021-02-19 18:57:33,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1345 transitions. [2021-02-19 18:57:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:57:33,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:33,070 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:33,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:33,292 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 941242308, now seen corresponding path program 11 times [2021-02-19 18:57:33,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:33,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673500821] [2021-02-19 18:57:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:33,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673500821] [2021-02-19 18:57:33,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677955018] [2021-02-19 18:57:33,696 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 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 18:57:33,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:57:33,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:57:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:34,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:34,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-02-19 18:57:34,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:34,441 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-02-19 18:57:34,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:34,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:57 [2021-02-19 18:57:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:34,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:34,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:34,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-02-19 18:57:34,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:34,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:34,710 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 18:57:34,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-02-19 18:57:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:34,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:34,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-02-19 18:57:34,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821667362] [2021-02-19 18:57:34,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:57:34,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:34,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:57:34,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:57:34,732 INFO L87 Difference]: Start difference. First operand 636 states and 1345 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:37,130 INFO L93 Difference]: Finished difference Result 2034 states and 4229 transitions. [2021-02-19 18:57:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:57:37,131 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:57:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:37,137 INFO L225 Difference]: With dead ends: 2034 [2021-02-19 18:57:37,137 INFO L226 Difference]: Without dead ends: 1743 [2021-02-19 18:57:37,139 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 18:57:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-02-19 18:57:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 552. [2021-02-19 18:57:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.132486388384755) internal successors, (1175), 551 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1175 transitions. [2021-02-19 18:57:37,157 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1175 transitions. Word has length 41 [2021-02-19 18:57:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:37,157 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 1175 transitions. [2021-02-19 18:57:37,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1175 transitions. [2021-02-19 18:57:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:57:37,159 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:37,159 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:37,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:57:37,383 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:37,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1056927202, now seen corresponding path program 12 times [2021-02-19 18:57:37,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:37,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420774950] [2021-02-19 18:57:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:57:37,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420774950] [2021-02-19 18:57:37,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109297510] [2021-02-19 18:57:37,725 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:37,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:57:37,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:37,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:57:37,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:38,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:38,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-02-19 18:57:38,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:38,619 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-02-19 18:57:38,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:38,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-02-19 18:57:40,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:40,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:40,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:40,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 66 [2021-02-19 18:57:40,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-02-19 18:57:40,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:40,395 INFO L354 Elim1Store]: treesize reduction 27, result has 47.1 percent of original size [2021-02-19 18:57:40,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 36 [2021-02-19 18:57:40,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:40,481 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-02-19 18:57:40,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:40,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-02-19 18:57:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:40,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:40,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-02-19 18:57:40,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578629411] [2021-02-19 18:57:40,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:57:40,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:57:40,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:57:40,621 INFO L87 Difference]: Start difference. First operand 552 states and 1175 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:43,929 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-02-19 18:57:44,816 WARN L202 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-02-19 18:57:46,201 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 18:57:46,762 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 18:57:47,145 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-02-19 18:57:47,605 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-02-19 18:57:48,475 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 18:57:49,313 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:57:57,032 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-02-19 18:57:59,728 WARN L202 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 18:58:00,244 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 18:58:04,750 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-02-19 18:58:05,980 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 18:58:07,092 WARN L202 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 18:58:07,853 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-02-19 18:58:16,090 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-02-19 18:58:18,208 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 18:58:19,282 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-02-19 18:58:23,156 WARN L202 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-19 18:58:26,178 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 18:58:26,820 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-02-19 18:58:29,240 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-02-19 18:58:30,543 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-02-19 18:58:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:32,861 INFO L93 Difference]: Finished difference Result 2899 states and 6103 transitions. [2021-02-19 18:58:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-02-19 18:58:32,862 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:58:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:32,869 INFO L225 Difference]: With dead ends: 2899 [2021-02-19 18:58:32,870 INFO L226 Difference]: Without dead ends: 2577 [2021-02-19 18:58:32,873 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5943 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=2715, Invalid=14577, Unknown=0, NotChecked=0, Total=17292 [2021-02-19 18:58:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-02-19 18:58:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 785. [2021-02-19 18:58:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.163265306122449) internal successors, (1696), 784 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1696 transitions. [2021-02-19 18:58:32,896 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1696 transitions. Word has length 41 [2021-02-19 18:58:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:32,896 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 1696 transitions. [2021-02-19 18:58:32,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1696 transitions. [2021-02-19 18:58:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:58:32,897 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:32,898 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:33,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:33,121 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:33,122 INFO L82 PathProgramCache]: Analyzing trace with hash -84373336, now seen corresponding path program 13 times [2021-02-19 18:58:33,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:33,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127896088] [2021-02-19 18:58:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:58:33,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127896088] [2021-02-19 18:58:33,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549355197] [2021-02-19 18:58:33,598 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 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 18:58:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:33,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:58:33,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:34,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:34,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-02-19 18:58:34,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:34,532 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-02-19 18:58:34,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:34,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-02-19 18:58:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:35,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:35,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:35,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-02-19 18:58:35,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:35,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:35,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:35,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-02-19 18:58:35,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:35,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:35,062 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 18:58:35,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-02-19 18:58:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:35,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:35,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-02-19 18:58:35,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559379951] [2021-02-19 18:58:35,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 18:58:35,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:35,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 18:58:35,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:58:35,081 INFO L87 Difference]: Start difference. First operand 785 states and 1696 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:37,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:37,967 INFO L93 Difference]: Finished difference Result 3151 states and 6770 transitions. [2021-02-19 18:58:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:58:37,968 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:58:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:37,977 INFO L225 Difference]: With dead ends: 3151 [2021-02-19 18:58:37,977 INFO L226 Difference]: Without dead ends: 2943 [2021-02-19 18:58:37,978 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:58:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2943 states. [2021-02-19 18:58:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2943 to 977. [2021-02-19 18:58:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.1547131147540983) internal successors, (2103), 976 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2103 transitions. [2021-02-19 18:58:38,007 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2103 transitions. Word has length 41 [2021-02-19 18:58:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:38,007 INFO L480 AbstractCegarLoop]: Abstraction has 977 states and 2103 transitions. [2021-02-19 18:58:38,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2103 transitions. [2021-02-19 18:58:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:58:38,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:38,009 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:38,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 18:58:38,218 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:38,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1119554632, now seen corresponding path program 14 times [2021-02-19 18:58:38,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:38,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15773324] [2021-02-19 18:58:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:38,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15773324] [2021-02-19 18:58:38,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288825554] [2021-02-19 18:58:38,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:58:38,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:58:38,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:38,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:58:38,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:39,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:39,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-02-19 18:58:39,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:39,540 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-02-19 18:58:39,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:39,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-02-19 18:58:39,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:39,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:39,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:39,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:39,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:39,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-02-19 18:58:39,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:39,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:39,743 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 18:58:39,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-02-19 18:58:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:39,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:39,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-02-19 18:58:39,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903927112] [2021-02-19 18:58:39,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:58:39,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:39,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:58:39,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:58:39,768 INFO L87 Difference]: Start difference. First operand 977 states and 2103 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:42,878 INFO L93 Difference]: Finished difference Result 3574 states and 7673 transitions. [2021-02-19 18:58:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:58:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:58:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:42,892 INFO L225 Difference]: With dead ends: 3574 [2021-02-19 18:58:42,892 INFO L226 Difference]: Without dead ends: 3330 [2021-02-19 18:58:42,893 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:58:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-02-19 18:58:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 1245. [2021-02-19 18:58:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 2.164790996784566) internal successors, (2693), 1244 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 2693 transitions. [2021-02-19 18:58:42,953 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 2693 transitions. Word has length 41 [2021-02-19 18:58:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:42,953 INFO L480 AbstractCegarLoop]: Abstraction has 1245 states and 2693 transitions. [2021-02-19 18:58:42,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 2693 transitions. [2021-02-19 18:58:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:58:42,956 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:42,956 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:43,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-02-19 18:58:43,165 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1059594090, now seen corresponding path program 15 times [2021-02-19 18:58:43,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:43,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692135991] [2021-02-19 18:58:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:43,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692135991] [2021-02-19 18:58:43,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885662383] [2021-02-19 18:58:43,734 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 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 18:58:43,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:58:43,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:58:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:44,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:44,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-02-19 18:58:44,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:44,396 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-02-19 18:58:44,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:44,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-02-19 18:58:44,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:44,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:44,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:44,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:44,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:44,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-02-19 18:58:44,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:44,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:44,833 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 18:58:44,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:5 [2021-02-19 18:58:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:44,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:44,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-02-19 18:58:44,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962983448] [2021-02-19 18:58:44,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 18:58:44,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:44,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 18:58:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:58:44,868 INFO L87 Difference]: Start difference. First operand 1245 states and 2693 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:46,282 INFO L93 Difference]: Finished difference Result 3344 states and 7274 transitions. [2021-02-19 18:58:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:58:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:58:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:46,293 INFO L225 Difference]: With dead ends: 3344 [2021-02-19 18:58:46,293 INFO L226 Difference]: Without dead ends: 3256 [2021-02-19 18:58:46,294 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:58:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-02-19 18:58:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1388. [2021-02-19 18:58:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.1679884643114637) internal successors, (3007), 1387 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 18:58:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3007 transitions. [2021-02-19 18:58:46,326 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3007 transitions. Word has length 41 [2021-02-19 18:58:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:46,326 INFO L480 AbstractCegarLoop]: Abstraction has 1388 states and 3007 transitions. [2021-02-19 18:58:46,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3007 transitions. [2021-02-19 18:58:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 18:58:46,329 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:46,329 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:46,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-02-19 18:58:46,546 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:46,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1400481327, now seen corresponding path program 16 times [2021-02-19 18:58:46,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:46,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219969855] [2021-02-19 18:58:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:46,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219969855] [2021-02-19 18:58:46,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789240943] [2021-02-19 18:58:46,628 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 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 18:58:46,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:58:46,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:58:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:46,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:46,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-02-19 18:58:46,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213167999] [2021-02-19 18:58:46,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:58:46,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:58:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:58:46,748 INFO L87 Difference]: Start difference. First operand 1388 states and 3007 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:46,852 INFO L93 Difference]: Finished difference Result 1940 states and 4198 transitions. [2021-02-19 18:58:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:58:46,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 18:58:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:46,860 INFO L225 Difference]: With dead ends: 1940 [2021-02-19 18:58:46,860 INFO L226 Difference]: Without dead ends: 1890 [2021-02-19 18:58:46,861 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:58:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-02-19 18:58:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1564. [2021-02-19 18:58:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.175943698016635) internal successors, (3401), 1563 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 3401 transitions. [2021-02-19 18:58:46,916 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 3401 transitions. Word has length 45 [2021-02-19 18:58:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:46,916 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 3401 transitions. [2021-02-19 18:58:46,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 3401 transitions. [2021-02-19 18:58:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-19 18:58:46,919 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:46,919 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:47,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 18:58:47,137 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash 41869736, now seen corresponding path program 17 times [2021-02-19 18:58:47,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:47,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658060565] [2021-02-19 18:58:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-19 18:58:47,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658060565] [2021-02-19 18:58:47,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517235811] [2021-02-19 18:58:47,178 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:47,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:58:47,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:58:47,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-19 18:58:47,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:47,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:58:47,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34818005] [2021-02-19 18:58:47,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:58:47,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:58:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:58:47,291 INFO L87 Difference]: Start difference. First operand 1564 states and 3401 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:47,315 INFO L93 Difference]: Finished difference Result 2055 states and 4440 transitions. [2021-02-19 18:58:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:58:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-02-19 18:58:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:47,320 INFO L225 Difference]: With dead ends: 2055 [2021-02-19 18:58:47,320 INFO L226 Difference]: Without dead ends: 2055 [2021-02-19 18:58:47,320 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:58:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-02-19 18:58:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1416. [2021-02-19 18:58:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 2.171024734982332) internal successors, (3072), 1415 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 3072 transitions. [2021-02-19 18:58:47,345 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 3072 transitions. Word has length 46 [2021-02-19 18:58:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:47,345 INFO L480 AbstractCegarLoop]: Abstraction has 1416 states and 3072 transitions. [2021-02-19 18:58:47,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 3072 transitions. [2021-02-19 18:58:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-19 18:58:47,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:47,348 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:47,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-02-19 18:58:47,562 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash 666107626, now seen corresponding path program 18 times [2021-02-19 18:58:47,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:47,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854703154] [2021-02-19 18:58:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:58:47,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854703154] [2021-02-19 18:58:47,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400446563] [2021-02-19 18:58:47,612 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:47,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:58:47,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:47,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:58:47,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:58:47,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:47,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:58:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920771786] [2021-02-19 18:58:47,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:58:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:58:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:58:47,723 INFO L87 Difference]: Start difference. First operand 1416 states and 3072 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:47,756 INFO L93 Difference]: Finished difference Result 1575 states and 3378 transitions. [2021-02-19 18:58:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:58:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-02-19 18:58:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:47,759 INFO L225 Difference]: With dead ends: 1575 [2021-02-19 18:58:47,759 INFO L226 Difference]: Without dead ends: 1575 [2021-02-19 18:58:47,759 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:58:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-02-19 18:58:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1170. [2021-02-19 18:58:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.1548331907613343) internal successors, (2519), 1169 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2519 transitions. [2021-02-19 18:58:47,777 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2519 transitions. Word has length 46 [2021-02-19 18:58:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:47,777 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 2519 transitions. [2021-02-19 18:58:47,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2519 transitions. [2021-02-19 18:58:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 18:58:47,779 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:47,779 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:47,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-02-19 18:58:47,994 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:47,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:47,994 INFO L82 PathProgramCache]: Analyzing trace with hash 681833415, now seen corresponding path program 19 times [2021-02-19 18:58:47,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:47,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599928884] [2021-02-19 18:58:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:48,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599928884] [2021-02-19 18:58:48,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570345659] [2021-02-19 18:58:48,766 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 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 18:58:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:48,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:58:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:49,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:49,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-02-19 18:58:49,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:49,700 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 18:58:49,701 INFO L628 ElimStorePlain]: treesize reduction 44, result has 76.8 percent of original size [2021-02-19 18:58:49,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:49,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:91 [2021-02-19 18:58:50,303 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-02-19 18:58:50,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-02-19 18:58:50,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:50,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:50,309 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 18:58:50,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-02-19 18:58:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:50,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:50,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-02-19 18:58:50,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535608029] [2021-02-19 18:58:50,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-02-19 18:58:50,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:50,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-02-19 18:58:50,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:58:50,334 INFO L87 Difference]: Start difference. First operand 1170 states and 2519 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:55,503 INFO L93 Difference]: Finished difference Result 2718 states and 5792 transitions. [2021-02-19 18:58:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:58:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 18:58:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:55,507 INFO L225 Difference]: With dead ends: 2718 [2021-02-19 18:58:55,507 INFO L226 Difference]: Without dead ends: 2622 [2021-02-19 18:58:55,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 18:58:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-02-19 18:58:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1302. [2021-02-19 18:58:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.166794773251345) internal successors, (2819), 1301 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2819 transitions. [2021-02-19 18:58:55,528 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2819 transitions. Word has length 50 [2021-02-19 18:58:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:55,528 INFO L480 AbstractCegarLoop]: Abstraction has 1302 states and 2819 transitions. [2021-02-19 18:58:55,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2819 transitions. [2021-02-19 18:58:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 18:58:55,530 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:55,530 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:55,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:55,746 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:55,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1074368007, now seen corresponding path program 20 times [2021-02-19 18:58:55,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:55,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014842389] [2021-02-19 18:58:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:58:56,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014842389] [2021-02-19 18:58:56,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703583776] [2021-02-19 18:58:56,450 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:56,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:58:56,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:58:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:57,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:57,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-02-19 18:58:57,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:58,090 INFO L628 ElimStorePlain]: treesize reduction 92, result has 58.9 percent of original size [2021-02-19 18:58:58,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:58,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:52 [2021-02-19 18:58:58,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:58,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-02-19 18:58:58,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:58,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:58,238 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 18:58:58,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:5 [2021-02-19 18:58:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:58,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:58,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-02-19 18:58:58,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707808660] [2021-02-19 18:58:58,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-02-19 18:58:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-02-19 18:58:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:58:58,264 INFO L87 Difference]: Start difference. First operand 1302 states and 2819 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:06,065 INFO L93 Difference]: Finished difference Result 3300 states and 7015 transitions. [2021-02-19 18:59:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 18:59:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 18:59:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:06,071 INFO L225 Difference]: With dead ends: 3300 [2021-02-19 18:59:06,071 INFO L226 Difference]: Without dead ends: 3187 [2021-02-19 18:59:06,072 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-02-19 18:59:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-02-19 18:59:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1656. [2021-02-19 18:59:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.1522658610271903) internal successors, (3562), 1655 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3562 transitions. [2021-02-19 18:59:06,104 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3562 transitions. Word has length 50 [2021-02-19 18:59:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:06,104 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 3562 transitions. [2021-02-19 18:59:06,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3562 transitions. [2021-02-19 18:59:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 18:59:06,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:06,107 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:06,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-02-19 18:59:06,330 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:06,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1964451975, now seen corresponding path program 21 times [2021-02-19 18:59:06,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:06,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380251929] [2021-02-19 18:59:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:07,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380251929] [2021-02-19 18:59:07,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100855601] [2021-02-19 18:59:07,035 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 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 18:59:07,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:59:07,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:07,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 18:59:07,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:08,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:08,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2021-02-19 18:59:08,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:08,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2021-02-19 18:59:08,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:09,274 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 84 [2021-02-19 18:59:09,275 INFO L628 ElimStorePlain]: treesize reduction 172, result has 59.9 percent of original size [2021-02-19 18:59:09,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 18:59:09,303 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:161, output treesize:109 [2021-02-19 18:59:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:09,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:09,760 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-02-19 18:59:09,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 37 [2021-02-19 18:59:09,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:09,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:09,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:09,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 48 [2021-02-19 18:59:09,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:59:09,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:09,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:59:09,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:133, output treesize:48 [2021-02-19 18:59:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:10,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:10,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-02-19 18:59:10,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116248558] [2021-02-19 18:59:10,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-02-19 18:59:10,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:10,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-02-19 18:59:10,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2280, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:59:10,058 INFO L87 Difference]: Start difference. First operand 1656 states and 3562 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:24,267 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-02-19 18:59:24,594 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 18:59:25,923 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-02-19 18:59:26,931 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-02-19 18:59:27,807 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 56 [2021-02-19 18:59:28,203 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-02-19 18:59:29,214 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-02-19 18:59:29,548 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2021-02-19 18:59:30,073 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-02-19 18:59:30,783 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-02-19 18:59:31,699 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2021-02-19 18:59:31,956 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-02-19 18:59:32,648 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2021-02-19 18:59:32,959 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-02-19 18:59:33,550 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-02-19 18:59:34,278 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 18:59:34,966 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2021-02-19 18:59:35,567 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-02-19 18:59:36,135 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2021-02-19 18:59:36,628 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-02-19 18:59:37,846 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2021-02-19 18:59:38,574 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-02-19 18:59:39,167 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-02-19 18:59:39,539 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-02-19 18:59:39,951 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-02-19 18:59:40,706 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-02-19 18:59:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:40,921 INFO L93 Difference]: Finished difference Result 4620 states and 9687 transitions. [2021-02-19 18:59:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-02-19 18:59:40,923 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 18:59:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:40,933 INFO L225 Difference]: With dead ends: 4620 [2021-02-19 18:59:40,933 INFO L226 Difference]: Without dead ends: 4359 [2021-02-19 18:59:40,935 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8667 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=3016, Invalid=22744, Unknown=0, NotChecked=0, Total=25760 [2021-02-19 18:59:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-02-19 18:59:40,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 1334. [2021-02-19 18:59:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 2.1657914478619653) internal successors, (2887), 1333 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 2887 transitions. [2021-02-19 18:59:40,974 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 2887 transitions. Word has length 50 [2021-02-19 18:59:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:40,974 INFO L480 AbstractCegarLoop]: Abstraction has 1334 states and 2887 transitions. [2021-02-19 18:59:40,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 2887 transitions. [2021-02-19 18:59:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 18:59:40,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:40,977 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:41,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-02-19 18:59:41,190 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash -550940871, now seen corresponding path program 22 times [2021-02-19 18:59:41,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:41,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399554351] [2021-02-19 18:59:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:59:42,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399554351] [2021-02-19 18:59:42,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84379983] [2021-02-19 18:59:42,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:59:42,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:59:42,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:42,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:59:42,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:44,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:44,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-02-19 18:59:44,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:45,126 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-19 18:59:45,127 INFO L628 ElimStorePlain]: treesize reduction 48, result has 76.7 percent of original size [2021-02-19 18:59:45,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:59:45,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:99 [2021-02-19 18:59:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-02-19 18:59:46,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:46,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-02-19 18:59:46,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:46,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:46,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:46,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-02-19 18:59:46,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:46,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:46,375 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 18:59:46,375 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:5 [2021-02-19 18:59:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:46,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:46,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 46 [2021-02-19 18:59:46,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98725765] [2021-02-19 18:59:46,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-02-19 18:59:46,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-02-19 18:59:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:59:46,407 INFO L87 Difference]: Start difference. First operand 1334 states and 2887 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:57,059 INFO L93 Difference]: Finished difference Result 3950 states and 8443 transitions. [2021-02-19 18:59:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 18:59:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 18:59:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:57,067 INFO L225 Difference]: With dead ends: 3950 [2021-02-19 18:59:57,068 INFO L226 Difference]: Without dead ends: 3729 [2021-02-19 18:59:57,069 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1234, Invalid=9896, Unknown=0, NotChecked=0, Total=11130 [2021-02-19 18:59:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-02-19 18:59:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 1660. [2021-02-19 18:59:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 2.1723930078360456) internal successors, (3604), 1659 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 3604 transitions. [2021-02-19 18:59:57,103 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 3604 transitions. Word has length 50 [2021-02-19 18:59:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:57,104 INFO L480 AbstractCegarLoop]: Abstraction has 1660 states and 3604 transitions. [2021-02-19 18:59:57,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 3604 transitions. [2021-02-19 18:59:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 18:59:57,106 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:57,106 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:57,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:59:57,322 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash -613568301, now seen corresponding path program 23 times [2021-02-19 18:59:57,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:57,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234972134] [2021-02-19 18:59:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:58,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234972134] [2021-02-19 18:59:58,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650849914] [2021-02-19 18:59:58,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:59:58,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:59:58,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:58,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:59:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:00:01,038 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-02-19 19:00:02,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:02,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-02-19 19:00:02,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:02,361 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-02-19 19:00:02,362 INFO L628 ElimStorePlain]: treesize reduction 92, result has 58.6 percent of original size [2021-02-19 19:00:02,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:00:02,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:74, output treesize:50 [2021-02-19 19:00:02,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:02,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:02,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:02,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-02-19 19:00:02,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:02,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:02,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:00:02,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:5 [2021-02-19 19:00:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:02,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:00:02,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 51 [2021-02-19 19:00:02,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371545175] [2021-02-19 19:00:02,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-02-19 19:00:02,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:00:02,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-02-19 19:00:02,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:00:02,959 INFO L87 Difference]: Start difference. First operand 1660 states and 3604 transitions. Second operand has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:09,620 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2021-02-19 19:00:09,986 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-02-19 19:00:12,299 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-02-19 19:00:12,641 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-02-19 19:00:13,666 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 42 [2021-02-19 19:00:14,138 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2021-02-19 19:00:14,659 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2021-02-19 19:00:15,266 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-02-19 19:00:16,010 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-02-19 19:00:16,355 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 43 [2021-02-19 19:00:16,874 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 41 [2021-02-19 19:00:17,295 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2021-02-19 19:00:18,411 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 43 [2021-02-19 19:00:19,018 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 43 [2021-02-19 19:00:19,550 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 42 [2021-02-19 19:00:20,377 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2021-02-19 19:00:20,685 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 51 [2021-02-19 19:00:21,183 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2021-02-19 19:00:21,802 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 51 [2021-02-19 19:00:22,555 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 50 [2021-02-19 19:00:22,915 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 52 [2021-02-19 19:00:23,642 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-02-19 19:00:24,147 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 52 [2021-02-19 19:00:24,540 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-02-19 19:00:25,644 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2021-02-19 19:00:26,330 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-02-19 19:00:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:00:27,453 INFO L93 Difference]: Finished difference Result 5567 states and 11860 transitions. [2021-02-19 19:00:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-02-19 19:00:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 19:00:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:00:27,461 INFO L225 Difference]: With dead ends: 5567 [2021-02-19 19:00:27,461 INFO L226 Difference]: Without dead ends: 5327 [2021-02-19 19:00:27,463 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4879 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1777, Invalid=14479, Unknown=0, NotChecked=0, Total=16256 [2021-02-19 19:00:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2021-02-19 19:00:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 2816. [2021-02-19 19:00:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 2.1548845470692717) internal successors, (6066), 2815 states have internal predecessors, (6066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 6066 transitions. [2021-02-19 19:00:27,522 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 6066 transitions. Word has length 50 [2021-02-19 19:00:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:00:27,523 INFO L480 AbstractCegarLoop]: Abstraction has 2816 states and 6066 transitions. [2021-02-19 19:00:27,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 6066 transitions. [2021-02-19 19:00:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 19:00:27,527 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:00:27,527 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:00:27,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:00:27,728 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:00:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:00:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash 756650707, now seen corresponding path program 24 times [2021-02-19 19:00:27,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:00:27,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760358891] [2021-02-19 19:00:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:00:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:00:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:00:28,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760358891] [2021-02-19 19:00:28,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477690978] [2021-02-19 19:00:28,859 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 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 19:00:28,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:00:28,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:00:28,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:00:28,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:00:33,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:33,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2021-02-19 19:00:33,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:33,391 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-02-19 19:00:33,392 INFO L628 ElimStorePlain]: treesize reduction 44, result has 76.1 percent of original size [2021-02-19 19:00:33,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 19:00:33,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:68, output treesize:85 [2021-02-19 19:01:26,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:01:26,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:26,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:26,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:01:27,152 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 19:01:27,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:27,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 51 treesize of output 91 [2021-02-19 19:01:27,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:01:27,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:01:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:27,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:27,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:01:27,650 INFO L244 Elim1Store]: Index analysis took 138 ms [2021-02-19 19:01:27,913 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 19:01:27,914 INFO L354 Elim1Store]: treesize reduction 20, result has 72.6 percent of original size [2021-02-19 19:01:27,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 68 [2021-02-19 19:01:27,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:28,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:01:28,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:28,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:28,064 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-02-19 19:01:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 51 treesize of output 1 [2021-02-19 19:01:28,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:28,370 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-02-19 19:01:28,371 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-02-19 19:01:28,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:01:28,380 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:188, output treesize:21 [2021-02-19 19:01:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:28,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:01:28,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 46 [2021-02-19 19:01:28,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690534971] [2021-02-19 19:01:28,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-02-19 19:01:28,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:01:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-02-19 19:01:28,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:01:28,768 INFO L87 Difference]: Start difference. First operand 2816 states and 6066 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:34,082 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-02-19 19:01:39,700 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 19:01:55,436 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-02-19 19:01:58,212 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 19:02:10,855 WARN L202 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-02-19 19:02:16,444 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-02-19 19:02:17,645 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 19:02:31,393 WARN L202 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2021-02-19 19:02:38,329 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2021-02-19 19:02:40,622 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 19:02:41,548 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-02-19 19:02:57,080 WARN L202 SmtUtils]: Spent 7.81 s on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-02-19 19:03:06,342 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-02-19 19:03:18,149 WARN L202 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 19:03:23,096 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-02-19 19:03:37,841 WARN L202 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-02-19 19:03:57,598 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-02-19 19:04:11,577 WARN L202 SmtUtils]: Spent 6.78 s on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 19:04:17,314 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 19:04:21,932 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 19:04:43,731 WARN L202 SmtUtils]: Spent 9.09 s on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 19:04:53,541 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 19:05:10,949 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-02-19 19:05:19,256 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 17 [2021-02-19 19:05:23,819 WARN L202 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-02-19 19:05:41,686 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-02-19 19:05:47,858 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 19:05:51,146 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-02-19 19:05:52,117 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 19:05:52,830 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 19:06:09,796 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-02-19 19:06:25,155 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 19:06:31,048 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-02-19 19:06:35,727 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 Received shutdown request... [2021-02-19 19:06:36,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:06:36,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-02-19 19:06:36,766 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:06:36,769 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:06:36,769 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:06:36 BasicIcfg [2021-02-19 19:06:36,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:06:36,770 INFO L168 Benchmark]: Toolchain (without parser) took 561814.94 ms. Allocated memory was 255.9 MB in the beginning and 509.6 MB in the end (delta: 253.8 MB). Free memory was 236.5 MB in the beginning and 271.0 MB in the end (delta: -34.5 MB). Peak memory consumption was 220.7 MB. Max. memory is 16.0 GB. [2021-02-19 19:06:36,770 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:06:36,770 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.64 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:06:36,770 INFO L168 Benchmark]: Boogie Preprocessor took 15.62 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:06:36,770 INFO L168 Benchmark]: RCFGBuilder took 235.94 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 237.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:06:36,770 INFO L168 Benchmark]: TraceAbstraction took 561527.62 ms. Allocated memory was 255.9 MB in the beginning and 509.6 MB in the end (delta: 253.8 MB). Free memory was 236.7 MB in the beginning and 271.0 MB in the end (delta: -34.3 MB). Peak memory consumption was 219.3 MB. Max. memory is 16.0 GB. [2021-02-19 19:06:36,770 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 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.64 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.62 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 235.94 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 237.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 561527.62 ms. Allocated memory was 255.9 MB in the beginning and 509.6 MB in the end (delta: 253.8 MB). Free memory was 236.7 MB in the beginning and 271.0 MB in the end (delta: -34.3 MB). Peak memory consumption was 219.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 61). Cancelled while BasicCegarLoop was constructing difference of abstraction (2816states) and FLOYD_HOARE automaton (currently 66 states, 47 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 100 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 561.4s, OverallIterations: 26, TraceHistogramMax: 4, AutomataDifference: 457.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1285 SDtfs, 5869 SDslu, 14990 SDs, 0 SdLazy, 40703 SolverSat, 3334 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 185.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2160 GetRequests, 684 SyntacticMatches, 57 SemanticMatches, 1418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45394 ImplicationChecksByTransitivity, 326.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2816occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 25 MinimizatonAttempts, 24231 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 96.8s InterpolantComputationTime, 1972 NumberOfCodeBlocks, 1972 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 1922 ConstructedInterpolants, 396 QuantifiedInterpolants, 1600222 SizeOfPredicates, 285 NumberOfNonLiveVariables, 2059 ConjunctsInSsa, 687 ConjunctsInUnsatCore, 50 InterpolantComputations, 2 PerfectInterpolantSequences, 276/1687 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