/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-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:23:39,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:23:39,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:23:39,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:23:40,004 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 [2021-05-03 16:23:40,031 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:23:40,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:23:40,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:23:40,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:23:40,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:23:40,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:23:40,033 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:23:40,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:23:40,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:23:40,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:23:40,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:23:40,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:23:40,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:23:40,036 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:23:40,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:23:40,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:23:40,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:23:40,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:23:40,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:23:40,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:23:40,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:23:40,036 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:23:40,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:23:40,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:23:40,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:23:40,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:23:40,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:23:40,283 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:23:40,284 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:23:40,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl [2021-05-03 16:23:40,285 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl' [2021-05-03 16:23:40,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:23:40,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:23:40,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:23:40,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:23:40,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:23:40,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:23:40,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:23:40,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:23:40,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:23:40,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/1) ... [2021-05-03 16:23:40,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:23:40,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:23:40,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:23:40,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:23:40,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (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 [2021-05-03 16:23:40,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:23:40,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:23:40,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:23:40,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:23:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:23:40,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:23:40,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:23:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:23:40,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:23:40,403 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:23:40,546 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:23:40,547 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:23:40,553 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:23:40 BoogieIcfgContainer [2021-05-03 16:23:40,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:23:40,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:23:40,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:23:40,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:23:40,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:23:40" (1/2) ... [2021-05-03 16:23:40,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c738e2 and model type dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:23:40, skipping insertion in model container [2021-05-03 16:23:40,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:23:40" (2/2) ... [2021-05-03 16:23:40,557 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq-array.wvr.bpl [2021-05-03 16:23:40,577 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:23:40,577 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:23:40,580 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:23:40,580 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:23:40,611 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 16:23:40,622 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 16:23:40,633 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:23:40,633 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:23:40,633 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:23:40,633 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:23:40,633 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:23:40,633 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:23:40,633 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:23:40,633 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:23:40,645 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-05-03 16:23:40,655 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) [2021-05-03 16:23:40,657 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) [2021-05-03 16:23:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 16:23:40,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:40,661 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:40,661 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-05-03 16:23:40,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:40,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211956439] [2021-05-03 16:23:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:40,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211956439] [2021-05-03 16:23:40,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:23:40,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:23:40,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446078683] [2021-05-03 16:23:40,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:23:40,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:40,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:23:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:23:40,768 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) [2021-05-03 16:23:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:40,794 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-05-03 16:23:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:23:40,795 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 [2021-05-03 16:23:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:40,806 INFO L225 Difference]: With dead ends: 104 [2021-05-03 16:23:40,806 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 16:23:40,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:23:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 16:23:40,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-05-03 16:23:40,842 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) [2021-05-03 16:23:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-05-03 16:23:40,845 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-05-03 16:23:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:40,845 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-05-03 16:23:40,845 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) [2021-05-03 16:23:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-05-03 16:23:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:23:40,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:40,847 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:40,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:23:40,847 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-05-03 16:23:40,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:40,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644733433] [2021-05-03 16:23:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:40,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644733433] [2021-05-03 16:23:40,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:23:40,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:23:40,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596303727] [2021-05-03 16:23:40,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:23:40,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:40,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:23:40,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:23:40,930 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) [2021-05-03 16:23:40,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:40,964 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-05-03 16:23:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:23:40,965 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 [2021-05-03 16:23:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:40,967 INFO L225 Difference]: With dead ends: 91 [2021-05-03 16:23:40,967 INFO L226 Difference]: Without dead ends: 83 [2021-05-03 16:23:40,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:23:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-03 16:23:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-03 16:23:40,972 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) [2021-05-03 16:23:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-05-03 16:23:40,973 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-05-03 16:23:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:40,973 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-05-03 16:23:40,973 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) [2021-05-03 16:23:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-05-03 16:23:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:23:40,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:40,974 INFO L551 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] [2021-05-03 16:23:40,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:23:40,974 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:40,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-05-03 16:23:40,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:40,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371987796] [2021-05-03 16:23:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371987796] [2021-05-03 16:23:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206657020] [2021-05-03 16:23:41,115 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 [2021-05-03 16:23:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 16:23:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:41,257 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 [2021-05-03 16:23:41,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:41,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:41,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:41,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-05-03 16:23:41,307 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 [2021-05-03 16:23:41,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:41,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:41,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:41,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-05-03 16:23:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:41,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:41,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-03 16:23:41,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402474705] [2021-05-03 16:23:41,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:23:41,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:23:41,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:23:41,374 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) [2021-05-03 16:23:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:41,457 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-05-03 16:23:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:23:41,457 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 [2021-05-03 16:23:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:41,458 INFO L225 Difference]: With dead ends: 154 [2021-05-03 16:23:41,458 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 16:23:41,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:23:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 16:23:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-05-03 16:23:41,463 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) [2021-05-03 16:23:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-05-03 16:23:41,464 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-05-03 16:23:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:41,464 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-05-03 16:23:41,464 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) [2021-05-03 16:23:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-05-03 16:23:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:23:41,465 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:41,465 INFO L551 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] [2021-05-03 16:23:41,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 16:23:41,683 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-05-03 16:23:41,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:41,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322825811] [2021-05-03 16:23:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:41,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322825811] [2021-05-03 16:23:41,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593424516] [2021-05-03 16:23:41,747 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) [2021-05-03 16:23:41,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:23:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:23:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:41,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:41,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-03 16:23:41,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372582930] [2021-05-03 16:23:41,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:23:41,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:41,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:23:41,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:23:41,841 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) [2021-05-03 16:23:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:41,901 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-05-03 16:23:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:23:41,902 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 [2021-05-03 16:23:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:41,904 INFO L225 Difference]: With dead ends: 284 [2021-05-03 16:23:41,904 INFO L226 Difference]: Without dead ends: 264 [2021-05-03 16:23:41,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:23:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-03 16:23:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-05-03 16:23:41,924 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) [2021-05-03 16:23:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-05-03 16:23:41,925 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-05-03 16:23:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:41,925 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-05-03 16:23:41,925 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) [2021-05-03 16:23:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-05-03 16:23:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:23:41,927 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:41,927 INFO L551 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] [2021-05-03 16:23:42,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:42,141 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-05-03 16:23:42,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:42,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128679043] [2021-05-03 16:23:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:42,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128679043] [2021-05-03 16:23:42,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778472124] [2021-05-03 16:23:42,387 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 [2021-05-03 16:23:42,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:23:42,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:23:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:42,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:42,602 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 [2021-05-03 16:23:42,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:42,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:42,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:42,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-05-03 16:23:42,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:42,829 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 20 treesize of output 38 [2021-05-03 16:23:42,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:23:42,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:42,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:42,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-05-03 16:23:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:42,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:42,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-05-03 16:23:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861780997] [2021-05-03 16:23:42,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:23:42,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:23:42,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:23:42,943 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:44,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:44,585 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-05-03 16:23:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 16:23:44,586 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:23:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:44,588 INFO L225 Difference]: With dead ends: 650 [2021-05-03 16:23:44,589 INFO L226 Difference]: Without dead ends: 573 [2021-05-03 16:23:44,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1377.7ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:23:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-05-03 16:23:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-05-03 16:23:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-05-03 16:23:44,612 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-05-03 16:23:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:44,613 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-05-03 16:23:44,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-05-03 16:23:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:23:44,619 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:44,620 INFO L551 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] [2021-05-03 16:23:44,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:44,836 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-05-03 16:23:44,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:44,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300639606] [2021-05-03 16:23:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:23:45,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300639606] [2021-05-03 16:23:45,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986105071] [2021-05-03 16:23:45,051 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 [2021-05-03 16:23:45,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:23:45,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:23:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:45,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:45,356 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 [2021-05-03 16:23:45,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:45,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:45,369 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. [2021-05-03 16:23:45,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-05-03 16:23:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:45,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:45,450 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 [2021-05-03 16:23:45,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:45,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:45,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:45,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-05-03 16:23:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:45,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:45,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-05-03 16:23:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152378766] [2021-05-03 16:23:45,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:23:45,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:45,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:23:45,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:23:45,468 INFO L87 Difference]: Start difference. First operand 386 states and 840 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) [2021-05-03 16:23:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:46,130 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-05-03 16:23:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:23:46,131 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 [2021-05-03 16:23:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:46,133 INFO L225 Difference]: With dead ends: 1023 [2021-05-03 16:23:46,134 INFO L226 Difference]: Without dead ends: 878 [2021-05-03 16:23:46,134 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:23:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-05-03 16:23:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-05-03 16:23:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-05-03 16:23:46,145 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-05-03 16:23:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:46,145 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-05-03 16:23:46,145 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) [2021-05-03 16:23:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-05-03 16:23:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:23:46,146 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:46,146 INFO L551 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] [2021-05-03 16:23:46,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:46,359 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-05-03 16:23:46,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:46,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304456756] [2021-05-03 16:23:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:46,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304456756] [2021-05-03 16:23:46,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096913508] [2021-05-03 16:23:46,567 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 [2021-05-03 16:23:46,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:23:46,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:23:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:46,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:46,892 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 [2021-05-03 16:23:46,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:46,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:46,907 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. [2021-05-03 16:23:46,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-05-03 16:23:47,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:47,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:47,004 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 22 treesize of output 10 [2021-05-03 16:23:47,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:47,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:47,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:47,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-05-03 16:23:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:47,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:47,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-05-03 16:23:47,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101418517] [2021-05-03 16:23:47,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:23:47,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:47,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:23:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:23:47,022 INFO L87 Difference]: Start difference. First operand 432 states and 939 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) [2021-05-03 16:23:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:47,773 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-05-03 16:23:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:23:47,774 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 [2021-05-03 16:23:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:47,776 INFO L225 Difference]: With dead ends: 1081 [2021-05-03 16:23:47,776 INFO L226 Difference]: Without dead ends: 927 [2021-05-03 16:23:47,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 680.5ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:23:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-05-03 16:23:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-05-03 16:23:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-05-03 16:23:47,786 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-05-03 16:23:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:47,787 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-05-03 16:23:47,787 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) [2021-05-03 16:23:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-05-03 16:23:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:23:47,788 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:47,788 INFO L551 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] [2021-05-03 16:23:48,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 16:23:48,002 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:48,003 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-05-03 16:23:48,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:48,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193048378] [2021-05-03 16:23:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:23:48,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193048378] [2021-05-03 16:23:48,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102777087] [2021-05-03 16:23:48,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:48,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:23:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:48,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:23:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:48,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:48,438 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 [2021-05-03 16:23:48,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:48,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:48,450 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. [2021-05-03 16:23:48,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-05-03 16:23:48,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:48,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:48,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:48,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:23:48,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:48,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:48,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:48,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-05-03 16:23:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:48,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:48,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-05-03 16:23:48,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291035568] [2021-05-03 16:23:48,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:23:48,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:23:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:23:48,532 INFO L87 Difference]: Start difference. First operand 450 states and 981 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) [2021-05-03 16:23:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:49,015 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-05-03 16:23:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:23:49,015 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 [2021-05-03 16:23:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:49,019 INFO L225 Difference]: With dead ends: 1039 [2021-05-03 16:23:49,019 INFO L226 Difference]: Without dead ends: 929 [2021-05-03 16:23:49,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 449.0ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:23:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-05-03 16:23:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-05-03 16:23:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-05-03 16:23:49,029 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-05-03 16:23:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:49,029 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-05-03 16:23:49,029 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) [2021-05-03 16:23:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-05-03 16:23:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:23:49,030 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:49,030 INFO L551 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] [2021-05-03 16:23:49,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:49,246 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:49,247 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-05-03 16:23:49,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:49,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740737851] [2021-05-03 16:23:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:49,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740737851] [2021-05-03 16:23:49,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183126275] [2021-05-03 16:23:49,445 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 [2021-05-03 16:23:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:49,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:23:49,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:49,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:49,679 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 [2021-05-03 16:23:49,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:49,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:49,690 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. [2021-05-03 16:23:49,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-05-03 16:23:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:49,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:49,774 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 [2021-05-03 16:23:49,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:49,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:49,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:49,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-05-03 16:23:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:49,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:49,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-05-03 16:23:49,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585221076] [2021-05-03 16:23:49,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:23:49,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:23:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:23:49,794 INFO L87 Difference]: Start difference. First operand 487 states and 1059 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) [2021-05-03 16:23:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:50,301 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-05-03 16:23:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:23:50,302 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 [2021-05-03 16:23:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:50,305 INFO L225 Difference]: With dead ends: 1050 [2021-05-03 16:23:50,305 INFO L226 Difference]: Without dead ends: 952 [2021-05-03 16:23:50,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 488.2ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:23:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-05-03 16:23:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-05-03 16:23:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-05-03 16:23:50,317 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-05-03 16:23:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:50,317 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-05-03 16:23:50,317 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) [2021-05-03 16:23:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-05-03 16:23:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 16:23:50,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:50,318 INFO L551 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] [2021-05-03 16:23:50,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:50,526 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:50,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-05-03 16:23:50,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:50,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928140988] [2021-05-03 16:23:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:50,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928140988] [2021-05-03 16:23:50,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666324387] [2021-05-03 16:23:50,576 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 [2021-05-03 16:23:50,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:23:50,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:50,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:50,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-05-03 16:23:50,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911874488] [2021-05-03 16:23:50,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:23:50,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:50,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:23:50,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:23:50,657 INFO L87 Difference]: Start difference. First operand 467 states and 1007 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) [2021-05-03 16:23:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:50,716 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-05-03 16:23:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:23:50,716 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 [2021-05-03 16:23:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:50,719 INFO L225 Difference]: With dead ends: 885 [2021-05-03 16:23:50,719 INFO L226 Difference]: Without dead ends: 847 [2021-05-03 16:23:50,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:23:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-05-03 16:23:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-05-03 16:23:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-05-03 16:23:50,730 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-05-03 16:23:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:50,730 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-05-03 16:23:50,730 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) [2021-05-03 16:23:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-05-03 16:23:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 16:23:50,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:50,731 INFO L551 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] [2021-05-03 16:23:50,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 16:23:50,945 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:50,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-05-03 16:23:50,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:50,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375858932] [2021-05-03 16:23:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:51,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375858932] [2021-05-03 16:23:51,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295450076] [2021-05-03 16:23:51,311 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 [2021-05-03 16:23:51,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:23:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:51,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 16:23:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:51,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:51,632 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 45 treesize of output 53 [2021-05-03 16:23:51,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:51,673 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-05-03 16:23:51,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:51,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:37 [2021-05-03 16:23:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:51,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:51,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:51,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:51,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:51,969 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 41 [2021-05-03 16:23:51,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:23:51,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:52,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:52,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:17 [2021-05-03 16:23:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:52,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:52,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-05-03 16:23:52,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192476977] [2021-05-03 16:23:52,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 16:23:52,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:52,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 16:23:52,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:23:52,068 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:57,068 INFO L93 Difference]: Finished difference Result 2858 states and 6129 transitions. [2021-05-03 16:23:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-03 16:23:57,069 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-03 16:23:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:57,075 INFO L225 Difference]: With dead ends: 2858 [2021-05-03 16:23:57,075 INFO L226 Difference]: Without dead ends: 2546 [2021-05-03 16:23:57,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4053 ImplicationChecksByTransitivity, 3375.8ms TimeCoverageRelationStatistics Valid=1710, Invalid=10946, Unknown=0, NotChecked=0, Total=12656 [2021-05-03 16:23:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-05-03 16:23:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 740. [2021-05-03 16:23:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.1502029769959403) internal successors, (1589), 739 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1589 transitions. [2021-05-03 16:23:57,093 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1589 transitions. Word has length 41 [2021-05-03 16:23:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:57,093 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 1589 transitions. [2021-05-03 16:23:57,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1589 transitions. [2021-05-03 16:23:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 16:23:57,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:57,094 INFO L551 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] [2021-05-03 16:23:57,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:57,307 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:57,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-05-03 16:23:57,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:57,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541238639] [2021-05-03 16:23:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:23:57,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541238639] [2021-05-03 16:23:57,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052280721] [2021-05-03 16:23:57,626 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) [2021-05-03 16:23:57,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:23:57,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:57,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 16:23:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:58,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:58,243 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 [2021-05-03 16:23:58,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:58,308 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-05-03 16:23:58,319 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. [2021-05-03 16:23:58,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-05-03 16:23:58,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:58,625 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 [2021-05-03 16:23:58,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:58,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:58,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:58,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:58,634 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 [2021-05-03 16:23:58,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:58,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:58,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:58,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-05-03 16:23:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:58,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:58,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-05-03 16:23:58,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836433224] [2021-05-03 16:23:58,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 16:23:58,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:58,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 16:23:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:23:58,653 INFO L87 Difference]: Start difference. First operand 740 states and 1589 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) [2021-05-03 16:24:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:00,614 INFO L93 Difference]: Finished difference Result 2305 states and 4887 transitions. [2021-05-03 16:24:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 16:24:00,615 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 [2021-05-03 16:24:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:00,620 INFO L225 Difference]: With dead ends: 2305 [2021-05-03 16:24:00,620 INFO L226 Difference]: Without dead ends: 2148 [2021-05-03 16:24:00,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1692.7ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:24:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-05-03 16:24:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 857. [2021-05-03 16:24:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.1401869158878504) internal successors, (1832), 856 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1832 transitions. [2021-05-03 16:24:00,641 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1832 transitions. Word has length 41 [2021-05-03 16:24:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:00,641 INFO L480 AbstractCegarLoop]: Abstraction has 857 states and 1832 transitions. [2021-05-03 16:24:00,642 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) [2021-05-03 16:24:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1832 transitions. [2021-05-03 16:24:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 16:24:00,643 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:00,643 INFO L551 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] [2021-05-03 16:24:00,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:00,857 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-05-03 16:24:00,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:00,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608752875] [2021-05-03 16:24:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:01,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608752875] [2021-05-03 16:24:01,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684240084] [2021-05-03 16:24:01,173 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 [2021-05-03 16:24:01,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:24:01,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:01,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 16:24:01,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:01,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:01,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-05-03 16:24:01,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:02,025 INFO L628 ElimStorePlain]: treesize reduction 12, result has 87.2 percent of original size [2021-05-03 16:24:02,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-05-03 16:24:02,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:70, output treesize:65 [2021-05-03 16:24:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:02,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:02,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:02,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:02,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:24:02,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:02,860 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.9 percent of original size [2021-05-03 16:24:02,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:02,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:54, output treesize:5 [2021-05-03 16:24:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:02,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:02,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2021-05-03 16:24:02,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791768527] [2021-05-03 16:24:02,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 16:24:02,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 16:24:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:24:02,871 INFO L87 Difference]: Start difference. First operand 857 states and 1832 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:07,456 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-03 16:24:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:13,990 INFO L93 Difference]: Finished difference Result 2475 states and 5199 transitions. [2021-05-03 16:24:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 16:24:13,990 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-05-03 16:24:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:13,996 INFO L225 Difference]: With dead ends: 2475 [2021-05-03 16:24:13,996 INFO L226 Difference]: Without dead ends: 2210 [2021-05-03 16:24:13,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 6136.1ms TimeCoverageRelationStatistics Valid=1090, Invalid=6920, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 16:24:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-05-03 16:24:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 749. [2021-05-03 16:24:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.1550802139037435) internal successors, (1612), 748 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1612 transitions. [2021-05-03 16:24:14,013 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1612 transitions. Word has length 41 [2021-05-03 16:24:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:14,013 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1612 transitions. [2021-05-03 16:24:14,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1612 transitions. [2021-05-03 16:24:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 16:24:14,014 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:14,014 INFO L551 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] [2021-05-03 16:24:14,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-03 16:24:14,230 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:14,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:14,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-05-03 16:24:14,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:14,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784406993] [2021-05-03 16:24:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:24:14,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784406993] [2021-05-03 16:24:14,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053031303] [2021-05-03 16:24:14,575 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 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 [2021-05-03 16:24:14,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:24:14,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:14,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 16:24:14,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:15,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:15,311 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 [2021-05-03 16:24:15,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:15,357 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-05-03 16:24:15,378 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. [2021-05-03 16:24:15,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-05-03 16:24:17,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:17,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:17,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:17,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:17,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:17,105 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 63 [2021-05-03 16:24:17,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 16:24:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:17,163 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-05-03 16:24:17,163 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 1 [2021-05-03 16:24:17,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:17,231 INFO L628 ElimStorePlain]: treesize reduction 38, result has 44.9 percent of original size [2021-05-03 16:24:17,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:17,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-05-03 16:24:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:17,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:17,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-05-03 16:24:17,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391744313] [2021-05-03 16:24:17,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 16:24:17,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 16:24:17,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:24:17,322 INFO L87 Difference]: Start difference. First operand 749 states and 1612 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) [2021-05-03 16:24:20,874 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:24:22,357 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:24:23,072 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-05-03 16:24:23,492 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 16:24:24,318 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 16:24:25,554 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 16:24:28,665 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 16:24:30,727 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-05-03 16:24:38,156 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-03 16:24:38,564 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-05-03 16:24:41,966 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-05-03 16:24:42,844 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-05-03 16:24:43,579 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-03 16:24:50,453 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-05-03 16:24:51,163 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-05-03 16:24:52,574 WARN L205 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-05-03 16:24:53,442 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-05-03 16:24:57,480 WARN L205 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-05-03 16:24:59,880 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-03 16:25:00,682 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-05-03 16:25:01,189 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-03 16:25:02,982 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-05-03 16:25:04,016 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-05-03 16:25:05,220 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:25:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:06,080 INFO L93 Difference]: Finished difference Result 3396 states and 7220 transitions. [2021-05-03 16:25:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-03 16:25:06,081 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 [2021-05-03 16:25:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:06,089 INFO L225 Difference]: With dead ends: 3396 [2021-05-03 16:25:06,089 INFO L226 Difference]: Without dead ends: 3074 [2021-05-03 16:25:06,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5844 ImplicationChecksByTransitivity, 31859.5ms TimeCoverageRelationStatistics Valid=2687, Invalid=14342, Unknown=1, NotChecked=0, Total=17030 [2021-05-03 16:25:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-05-03 16:25:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 885. [2021-05-03 16:25:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.1572398190045248) internal successors, (1907), 884 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1907 transitions. [2021-05-03 16:25:06,110 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1907 transitions. Word has length 41 [2021-05-03 16:25:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:06,110 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 1907 transitions. [2021-05-03 16:25:06,110 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) [2021-05-03 16:25:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1907 transitions. [2021-05-03 16:25:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 16:25:06,112 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:06,112 INFO L551 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] [2021-05-03 16:25:06,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:06,325 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-05-03 16:25:06,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:06,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461382445] [2021-05-03 16:25:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:25:06,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461382445] [2021-05-03 16:25:06,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403928740] [2021-05-03 16:25:06,714 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 [2021-05-03 16:25:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:06,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 16:25:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:07,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:07,475 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 [2021-05-03 16:25:07,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:07,529 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-05-03 16:25:07,535 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. [2021-05-03 16:25:07,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-05-03 16:25:07,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:07,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:07,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:07,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:07,631 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 [2021-05-03 16:25:07,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:07,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:07,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:07,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-05-03 16:25:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:07,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:07,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-05-03 16:25:07,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265508209] [2021-05-03 16:25:07,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 16:25:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 16:25:07,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:25:07,654 INFO L87 Difference]: Start difference. First operand 885 states and 1907 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) [2021-05-03 16:25:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:10,356 INFO L93 Difference]: Finished difference Result 3311 states and 7108 transitions. [2021-05-03 16:25:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 16:25:10,357 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 [2021-05-03 16:25:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:10,364 INFO L225 Difference]: With dead ends: 3311 [2021-05-03 16:25:10,364 INFO L226 Difference]: Without dead ends: 3103 [2021-05-03 16:25:10,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1866.4ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 16:25:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2021-05-03 16:25:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 1077. [2021-05-03 16:25:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 2.150557620817844) internal successors, (2314), 1076 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2314 transitions. [2021-05-03 16:25:10,385 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2314 transitions. Word has length 41 [2021-05-03 16:25:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:10,385 INFO L480 AbstractCegarLoop]: Abstraction has 1077 states and 2314 transitions. [2021-05-03 16:25:10,385 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) [2021-05-03 16:25:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2314 transitions. [2021-05-03 16:25:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 16:25:10,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:10,387 INFO L551 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] [2021-05-03 16:25:10,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-05-03 16:25:10,601 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-05-03 16:25:10,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:10,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358570514] [2021-05-03 16:25:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:11,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358570514] [2021-05-03 16:25:11,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073797855] [2021-05-03 16:25:11,009 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) [2021-05-03 16:25:11,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:25:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:11,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 16:25:11,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:11,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:11,789 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 [2021-05-03 16:25:11,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:11,843 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-05-03 16:25:11,856 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. [2021-05-03 16:25:11,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-05-03 16:25:11,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:11,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:11,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:11,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:11,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:11,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:11,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:11,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:11,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 [2021-05-03 16:25:11,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:12,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:12,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:12,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-05-03 16:25:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:12,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:12,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-05-03 16:25:12,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589542082] [2021-05-03 16:25:12,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 16:25:12,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:12,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 16:25:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:25:12,021 INFO L87 Difference]: Start difference. First operand 1077 states and 2314 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) [2021-05-03 16:25:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:15,254 INFO L93 Difference]: Finished difference Result 3732 states and 8006 transitions. [2021-05-03 16:25:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 16:25:15,255 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 [2021-05-03 16:25:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:15,265 INFO L225 Difference]: With dead ends: 3732 [2021-05-03 16:25:15,265 INFO L226 Difference]: Without dead ends: 3488 [2021-05-03 16:25:15,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 2178.0ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 16:25:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2021-05-03 16:25:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 1343. [2021-05-03 16:25:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.1609538002980626) internal successors, (2900), 1342 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2900 transitions. [2021-05-03 16:25:15,289 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2900 transitions. Word has length 41 [2021-05-03 16:25:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:15,289 INFO L480 AbstractCegarLoop]: Abstraction has 1343 states and 2900 transitions. [2021-05-03 16:25:15,289 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) [2021-05-03 16:25:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2900 transitions. [2021-05-03 16:25:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 16:25:15,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:15,291 INFO L551 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] [2021-05-03 16:25:15,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:15,505 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-05-03 16:25:15,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:15,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16681861] [2021-05-03 16:25:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:15,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16681861] [2021-05-03 16:25:15,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652284794] [2021-05-03 16:25:15,954 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 [2021-05-03 16:25:15,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:25:15,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 16:25:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:16,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:16,541 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 [2021-05-03 16:25:16,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:16,606 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-05-03 16:25:16,613 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. [2021-05-03 16:25:16,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-05-03 16:25:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:17,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-05-03 16:25:17,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 16:25:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:17,212 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-05-03 16:25:17,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-05-03 16:25:17,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:17,308 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-05-03 16:25:17,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:25:17,332 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-05-03 16:25:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:17,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:17,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-05-03 16:25:17,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799935261] [2021-05-03 16:25:17,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 16:25:17,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:17,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 16:25:17,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:25:17,465 INFO L87 Difference]: Start difference. First operand 1343 states and 2900 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:21,922 INFO L93 Difference]: Finished difference Result 3547 states and 7648 transitions. [2021-05-03 16:25:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:25:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-03 16:25:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:21,935 INFO L225 Difference]: With dead ends: 3547 [2021-05-03 16:25:21,935 INFO L226 Difference]: Without dead ends: 3386 [2021-05-03 16:25:21,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3555.0ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 16:25:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-05-03 16:25:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 1486. [2021-05-03 16:25:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 2.164309764309764) internal successors, (3214), 1485 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 3214 transitions. [2021-05-03 16:25:21,958 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 3214 transitions. Word has length 41 [2021-05-03 16:25:21,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:21,959 INFO L480 AbstractCegarLoop]: Abstraction has 1486 states and 3214 transitions. [2021-05-03 16:25:21,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:21,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 3214 transitions. [2021-05-03 16:25:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 16:25:21,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:21,961 INFO L551 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] [2021-05-03 16:25:22,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:22,177 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:22,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-05-03 16:25:22,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:22,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304982599] [2021-05-03 16:25:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:22,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304982599] [2021-05-03 16:25:22,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538931147] [2021-05-03 16:25:22,247 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 [2021-05-03 16:25:22,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:25:22,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:22,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:25:22,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:22,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:22,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-05-03 16:25:22,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939017165] [2021-05-03 16:25:22,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:25:22,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:22,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:25:22,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:25:22,371 INFO L87 Difference]: Start difference. First operand 1486 states and 3214 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) [2021-05-03 16:25:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:22,475 INFO L93 Difference]: Finished difference Result 2022 states and 4373 transitions. [2021-05-03 16:25:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:25:22,476 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 [2021-05-03 16:25:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:22,480 INFO L225 Difference]: With dead ends: 2022 [2021-05-03 16:25:22,480 INFO L226 Difference]: Without dead ends: 1972 [2021-05-03 16:25:22,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:25:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-05-03 16:25:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1624. [2021-05-03 16:25:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.176833025261861) internal successors, (3533), 1623 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 3533 transitions. [2021-05-03 16:25:22,499 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 3533 transitions. Word has length 45 [2021-05-03 16:25:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:22,499 INFO L480 AbstractCegarLoop]: Abstraction has 1624 states and 3533 transitions. [2021-05-03 16:25:22,499 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) [2021-05-03 16:25:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 3533 transitions. [2021-05-03 16:25:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-03 16:25:22,502 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:22,502 INFO L551 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] [2021-05-03 16:25:22,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-03 16:25:22,717 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:22,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-05-03 16:25:22,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:22,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951910397] [2021-05-03 16:25:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-03 16:25:22,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951910397] [2021-05-03 16:25:22,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359774416] [2021-05-03 16:25:22,752 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 [2021-05-03 16:25:22,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:25:22,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:22,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:25:22,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 16:25:22,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:22,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 16:25:22,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23637051] [2021-05-03 16:25:22,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:25:22,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:22,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:25:22,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:25:22,861 INFO L87 Difference]: Start difference. First operand 1624 states and 3533 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) [2021-05-03 16:25:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:22,893 INFO L93 Difference]: Finished difference Result 2107 states and 4556 transitions. [2021-05-03 16:25:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:25:22,894 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 [2021-05-03 16:25:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:22,898 INFO L225 Difference]: With dead ends: 2107 [2021-05-03 16:25:22,898 INFO L226 Difference]: Without dead ends: 2107 [2021-05-03 16:25:22,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:25:22,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-05-03 16:25:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1448. [2021-05-03 16:25:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 2.1727712508638564) internal successors, (3144), 1447 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 3144 transitions. [2021-05-03 16:25:22,918 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 3144 transitions. Word has length 46 [2021-05-03 16:25:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:22,918 INFO L480 AbstractCegarLoop]: Abstraction has 1448 states and 3144 transitions. [2021-05-03 16:25:22,918 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) [2021-05-03 16:25:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 3144 transitions. [2021-05-03 16:25:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-03 16:25:22,920 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:22,920 INFO L551 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] [2021-05-03 16:25:23,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-03 16:25:23,133 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:23,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-05-03 16:25:23,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:23,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901967218] [2021-05-03 16:25:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:25:23,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901967218] [2021-05-03 16:25:23,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172268737] [2021-05-03 16:25:23,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:25:23,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:25:23,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:23,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:25:23,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 16:25:23,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:23,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 16:25:23,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219088320] [2021-05-03 16:25:23,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:25:23,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:23,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:25:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:25:23,275 INFO L87 Difference]: Start difference. First operand 1448 states and 3144 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) [2021-05-03 16:25:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:23,309 INFO L93 Difference]: Finished difference Result 1607 states and 3450 transitions. [2021-05-03 16:25:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:25:23,310 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 [2021-05-03 16:25:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:23,312 INFO L225 Difference]: With dead ends: 1607 [2021-05-03 16:25:23,312 INFO L226 Difference]: Without dead ends: 1607 [2021-05-03 16:25:23,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:25:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-05-03 16:25:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1210. [2021-05-03 16:25:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 2.1563275434243176) internal successors, (2607), 1209 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2607 transitions. [2021-05-03 16:25:23,327 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2607 transitions. Word has length 46 [2021-05-03 16:25:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:23,327 INFO L480 AbstractCegarLoop]: Abstraction has 1210 states and 2607 transitions. [2021-05-03 16:25:23,327 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) [2021-05-03 16:25:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2607 transitions. [2021-05-03 16:25:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 16:25:23,329 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:23,329 INFO L551 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] [2021-05-03 16:25:23,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-03 16:25:23,544 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:23,544 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-05-03 16:25:23,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:23,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095642972] [2021-05-03 16:25:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:24,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095642972] [2021-05-03 16:25:24,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647079842] [2021-05-03 16:25:24,320 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 [2021-05-03 16:25:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 16:25:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:25,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:25,056 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 [2021-05-03 16:25:25,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:25,177 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 16:25:25,178 INFO L628 ElimStorePlain]: treesize reduction 75, result has 63.9 percent of original size [2021-05-03 16:25:25,202 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. [2021-05-03 16:25:25,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:68 [2021-05-03 16:25:25,806 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-05-03 16:25:25,806 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 [2021-05-03 16:25:25,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:25,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:25,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:25,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-05-03 16:25:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:25,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:25,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-05-03 16:25:25,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388248956] [2021-05-03 16:25:25,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 16:25:25,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:25,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 16:25:25,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:25:25,826 INFO L87 Difference]: Start difference. First operand 1210 states and 2607 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) [2021-05-03 16:25:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:30,693 INFO L93 Difference]: Finished difference Result 2758 states and 5880 transitions. [2021-05-03 16:25:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 16:25:30,695 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 [2021-05-03 16:25:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:30,699 INFO L225 Difference]: With dead ends: 2758 [2021-05-03 16:25:30,699 INFO L226 Difference]: Without dead ends: 2662 [2021-05-03 16:25:30,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 3522.0ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 16:25:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-05-03 16:25:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1302. [2021-05-03 16:25:30,716 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) [2021-05-03 16:25:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2819 transitions. [2021-05-03 16:25:30,718 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2819 transitions. Word has length 50 [2021-05-03 16:25:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:30,718 INFO L480 AbstractCegarLoop]: Abstraction has 1302 states and 2819 transitions. [2021-05-03 16:25:30,718 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) [2021-05-03 16:25:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2819 transitions. [2021-05-03 16:25:30,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 16:25:30,720 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:30,720 INFO L551 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] [2021-05-03 16:25:30,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-05-03 16:25:30,936 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-05-03 16:25:30,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:30,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489408535] [2021-05-03 16:25:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:25:31,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489408535] [2021-05-03 16:25:31,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163673943] [2021-05-03 16:25:31,724 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 [2021-05-03 16:25:31,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:25:31,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:31,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 16:25:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:33,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:33,168 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 [2021-05-03 16:25:33,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:33,291 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-05-03 16:25:33,291 INFO L628 ElimStorePlain]: treesize reduction 48, result has 76.7 percent of original size [2021-05-03 16:25:33,320 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. [2021-05-03 16:25:33,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:99 [2021-05-03 16:25:34,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,065 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 [2021-05-03 16:25:34,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:34,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,098 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 [2021-05-03 16:25:34,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:34,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:34,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:34,116 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 [2021-05-03 16:25:34,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:34,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:34,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:34,128 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:5 [2021-05-03 16:25:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:34,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:34,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-05-03 16:25:34,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452380232] [2021-05-03 16:25:34,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 16:25:34,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:34,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 16:25:34,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:25:34,142 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) [2021-05-03 16:25:41,646 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-05-03 16:25:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:42,397 INFO L93 Difference]: Finished difference Result 3300 states and 7015 transitions. [2021-05-03 16:25:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-03 16:25:42,398 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 [2021-05-03 16:25:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:42,404 INFO L225 Difference]: With dead ends: 3300 [2021-05-03 16:25:42,404 INFO L226 Difference]: Without dead ends: 3187 [2021-05-03 16:25:42,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 6400.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-05-03 16:25:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-05-03 16:25:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1656. [2021-05-03 16:25:42,426 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) [2021-05-03 16:25:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3562 transitions. [2021-05-03 16:25:42,429 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3562 transitions. Word has length 50 [2021-05-03 16:25:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:42,429 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 3562 transitions. [2021-05-03 16:25:42,429 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) [2021-05-03 16:25:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3562 transitions. [2021-05-03 16:25:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 16:25:42,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:42,431 INFO L551 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] [2021-05-03 16:25:42,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable240 [2021-05-03 16:25:42,645 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:42,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-05-03 16:25:42,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:42,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112706682] [2021-05-03 16:25:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:43,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112706682] [2021-05-03 16:25:43,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311450335] [2021-05-03 16:25:43,462 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 [2021-05-03 16:25:43,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:25:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:43,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:25:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:46,633 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:25:46,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:46,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-05-03 16:25:46,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:46,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:46,869 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 54 treesize of output 82 [2021-05-03 16:25:46,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:47,198 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-05-03 16:25:47,199 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-05-03 16:25:47,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-05-03 16:25:47,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-05-03 16:25:59,959 WARN L205 SmtUtils]: Spent 8.47 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:26:39,789 WARN L205 SmtUtils]: Spent 18.78 s on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-05-03 16:26:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:40,318 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 16:26:40,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:40,319 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 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-05-03 16:26:42,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-05-03 16:26:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:26:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:42,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:42,251 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-05-03 16:26:42,252 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-05-03 16:26:42,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-05-03 16:26:42,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:43,228 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 73 [2021-05-03 16:26:43,229 INFO L628 ElimStorePlain]: treesize reduction 907, result has 14.7 percent of original size [2021-05-03 16:26:43,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:26:43,262 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-05-03 16:26:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:43,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:43,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-05-03 16:26:43,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316636390] [2021-05-03 16:26:43,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-03 16:26:43,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:43,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-03 16:26:43,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2269, Unknown=2, NotChecked=0, Total=2550 [2021-05-03 16:26:43,473 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) [2021-05-03 16:27:08,948 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 40 [2021-05-03 16:27:19,085 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 42 [2021-05-03 16:27:24,846 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-03 16:27:41,340 WARN L205 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2021-05-03 16:27:46,171 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-05-03 16:27:52,565 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-05-03 16:28:02,038 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-05-03 16:28:07,850 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 44 [2021-05-03 16:28:22,396 WARN L205 SmtUtils]: Spent 8.76 s on a formula simplification. DAG size of input: 125 DAG size of output: 68 [2021-05-03 16:28:32,592 WARN L205 SmtUtils]: Spent 7.84 s on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2021-05-03 16:28:38,765 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-05-03 16:28:51,180 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 55 [2021-05-03 16:28:56,344 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2021-05-03 16:29:04,481 WARN L205 SmtUtils]: Spent 7.24 s on a formula simplification. DAG size of input: 125 DAG size of output: 48 [2021-05-03 16:29:19,329 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 52 [2021-05-03 16:29:28,605 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 120 DAG size of output: 65 [2021-05-03 16:29:38,013 WARN L205 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2021-05-03 16:29:50,642 WARN L205 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 122 DAG size of output: 51 [2021-05-03 16:29:53,765 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 16:29:54,411 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-05-03 16:30:02,251 WARN L205 SmtUtils]: Spent 3.69 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-05-03 16:30:10,779 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2021-05-03 16:30:16,839 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-05-03 16:30:33,402 WARN L205 SmtUtils]: Spent 7.12 s on a formula simplification. DAG size of input: 124 DAG size of output: 53 [2021-05-03 16:30:50,183 WARN L205 SmtUtils]: Spent 7.52 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-05-03 16:31:09,031 WARN L205 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 126 DAG size of output: 70 [2021-05-03 16:31:27,145 WARN L205 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2021-05-03 16:31:41,958 WARN L205 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 51 [2021-05-03 16:31:53,367 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 71 [2021-05-03 16:31:59,791 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-05-03 16:32:36,701 WARN L205 SmtUtils]: Spent 16.76 s on a formula simplification. DAG size of input: 128 DAG size of output: 53 [2021-05-03 16:32:38,510 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-05-03 16:32:39,518 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-05-03 16:32:57,812 WARN L205 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2021-05-03 16:33:00,883 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 145 DAG size of output: 53 [2021-05-03 16:33:17,515 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 129 DAG size of output: 56 [2021-05-03 16:33:37,325 WARN L205 SmtUtils]: Spent 6.75 s on a formula simplification. DAG size of input: 118 DAG size of output: 64 [2021-05-03 16:33:43,033 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 53 [2021-05-03 16:34:09,665 WARN L205 SmtUtils]: Spent 9.30 s on a formula simplification. DAG size of input: 133 DAG size of output: 55 [2021-05-03 16:34:17,135 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-05-03 16:34:24,994 WARN L205 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-05-03 16:34:35,119 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-03 16:34:55,241 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2021-05-03 16:35:19,056 WARN L205 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 116 DAG size of output: 60 [2021-05-03 16:35:27,278 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 55 [2021-05-03 16:35:39,232 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-05-03 16:35:48,976 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-05-03 16:36:00,094 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 36 [2021-05-03 16:36:43,598 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 144 DAG size of output: 52 [2021-05-03 16:37:04,837 WARN L205 SmtUtils]: Spent 9.57 s on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2021-05-03 16:37:12,511 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-05-03 16:37:17,475 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-05-03 16:37:22,043 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-05-03 16:37:28,768 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-05-03 16:37:51,202 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 119 DAG size of output: 65 [2021-05-03 16:38:00,867 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-03 16:38:13,681 WARN L205 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 104 DAG size of output: 62 Received shutdown request... [2021-05-03 16:38:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-03 16:38:15,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-05-03 16:38:15,810 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 16:38:15,813 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 16:38:15,814 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:38:15 BasicIcfg [2021-05-03 16:38:15,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:38:15,814 INFO L168 Benchmark]: Toolchain (without parser) took 875501.47 ms. Allocated memory was 331.4 MB in the beginning and 574.6 MB in the end (delta: 243.3 MB). Free memory was 311.2 MB in the beginning and 383.5 MB in the end (delta: -72.3 MB). Peak memory consumption was 174.7 MB. Max. memory is 16.0 GB. [2021-05-03 16:38:15,814 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 331.4 MB. Free memory is still 312.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:38:15,814 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.26 ms. Allocated memory is still 331.4 MB. Free memory was 311.2 MB in the beginning and 309.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:38:15,814 INFO L168 Benchmark]: Boogie Preprocessor took 12.03 ms. Allocated memory is still 331.4 MB. Free memory was 309.8 MB in the beginning and 308.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:38:15,814 INFO L168 Benchmark]: RCFGBuilder took 202.21 ms. Allocated memory is still 331.4 MB. Free memory was 308.8 MB in the beginning and 295.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-05-03 16:38:15,814 INFO L168 Benchmark]: TraceAbstraction took 875259.70 ms. Allocated memory was 331.4 MB in the beginning and 574.6 MB in the end (delta: 243.3 MB). Free memory was 295.4 MB in the beginning and 383.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 157.9 MB. Max. memory is 16.0 GB. [2021-05-03 16:38:15,815 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 0.09 ms. Allocated memory is still 331.4 MB. Free memory is still 312.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.26 ms. Allocated memory is still 331.4 MB. Free memory was 311.2 MB in the beginning and 309.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.03 ms. Allocated memory is still 331.4 MB. Free memory was 309.8 MB in the beginning and 308.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 202.21 ms. Allocated memory is still 331.4 MB. Free memory was 308.8 MB in the beginning and 295.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 875259.70 ms. Allocated memory was 331.4 MB in the beginning and 574.6 MB in the end (delta: 243.3 MB). Free memory was 295.4 MB in the beginning and 383.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 157.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 62). Cancelled while BasicCegarLoop was constructing difference of abstraction (1656states) and FLOYD_HOARE automaton (currently 115 states, 51 states before enhancement),while ReachableStatesComputation was computing reachable states (2095 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 875178.9ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 37.4ms, AutomataDifference: 787125.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1137 SDtfs, 5270 SDslu, 11983 SDs, 0 SdLazy, 29275 SolverSat, 3163 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 160892.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1819 GetRequests, 592 SyntacticMatches, 44 SemanticMatches, 1183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36306 ImplicationChecksByTransitivity, 681676.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1656occurred in iteration=22, InterpolantAutomatonStates: 764, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 365.7ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19353 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 105.8ms SsaConstructionTime, 431.9ms SatisfiabilityAnalysisTime, 82142.9ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 305 QuantifiedInterpolants, 27908 SizeOfPredicates, 228 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 537 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 269/1315 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