/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:19:16,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:19:16,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:19:16,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:19:16,630 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-Separate.epf [2021-06-05 15:19:16,660 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:19:16,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:19:16,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:19:16,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:19:16,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:19:16,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:19:16,666 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:19:16,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:19:16,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:19:16,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:19:16,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:19:16,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:19:16,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:19:16,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:19:16,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:19:16,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:19:16,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:19:16,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:19:16,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:19:16,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:19:16,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:19:16,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:19:16,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:19:16,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:19:16,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:19:16,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:19:16,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:19:16,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:19:16,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:19:16,670 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:19:16,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:19:16,670 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:19:16,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:19:16,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:19:17,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:19:17,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:19:17,021 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:19:17,022 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:19:17,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl [2021-06-05 15:19:17,023 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl' [2021-06-05 15:19:17,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:19:17,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:19:17,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:19:17,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:19:17,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:19:17,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:19:17,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:19:17,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:19:17,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:19:17,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... [2021-06-05 15:19:17,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:19:17,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:19:17,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:19:17,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:19:17,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:19:17,168 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:19:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:19:17,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:19:17,170 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:19:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:19:17,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:19:17,170 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:19:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:19:17,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:19:17,171 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:19:17,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:19:17,350 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:19:17,352 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:19:17 BoogieIcfgContainer [2021-06-05 15:19:17,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:19:17,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:19:17,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:19:17,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:19:17,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:17" (1/2) ... [2021-06-05 15:19:17,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd90827 and model type figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:19:17, skipping insertion in model container [2021-06-05 15:19:17,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:19:17" (2/2) ... [2021-06-05 15:19:17,358 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.bpl [2021-06-05 15:19:17,363 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:19:17,363 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:19:17,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:19:17,364 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:19:17,389 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 15:19:17,407 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 15:19:17,424 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:19:17,424 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:19:17,424 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:19:17,425 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:19:17,425 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:19:17,425 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:19:17,425 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:19:17,425 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:19:17,432 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-05 15:19:17,470 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:19:17,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:17,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:17,478 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1829606569, now seen corresponding path program 1 times [2021-06-05 15:19:17,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:17,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373275316] [2021-06-05 15:19:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:17,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:17,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373275316] [2021-06-05 15:19:17,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373275316] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:17,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:17,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 15:19:17,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188980031] [2021-06-05 15:19:17,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:19:17,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:17,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:19:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:19:17,786 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:17,977 INFO L93 Difference]: Finished difference Result 67 states and 111 transitions. [2021-06-05 15:19:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:19:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 15:19:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:17,987 INFO L225 Difference]: With dead ends: 67 [2021-06-05 15:19:17,987 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 15:19:17,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:19:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 15:19:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-06-05 15:19:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 69 transitions. [2021-06-05 15:19:18,018 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 69 transitions. Word has length 15 [2021-06-05 15:19:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:18,018 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 69 transitions. [2021-06-05 15:19:18,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 69 transitions. [2021-06-05 15:19:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:19:18,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:18,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:18,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:19:18,020 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:18,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1179537599, now seen corresponding path program 2 times [2021-06-05 15:19:18,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:18,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595531562] [2021-06-05 15:19:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:18,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:18,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595531562] [2021-06-05 15:19:18,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595531562] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:18,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:18,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 15:19:18,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337131014] [2021-06-05 15:19:18,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:19:18,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:18,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:19:18,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:19:18,215 INFO L87 Difference]: Start difference. First operand 39 states and 69 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:18,379 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-06-05 15:19:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:19:18,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 15:19:18,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:18,381 INFO L225 Difference]: With dead ends: 50 [2021-06-05 15:19:18,381 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 15:19:18,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:19:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 15:19:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-06-05 15:19:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-06-05 15:19:18,396 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-06-05 15:19:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:18,396 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-06-05 15:19:18,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-06-05 15:19:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:19:18,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:18,397 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:18,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:19:18,399 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1059156761, now seen corresponding path program 1 times [2021-06-05 15:19:18,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:18,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182089189] [2021-06-05 15:19:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:18,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:18,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182089189] [2021-06-05 15:19:18,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182089189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:18,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670548187] [2021-06-05 15:19:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:18,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:18,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670548187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:18,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:18,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:19:18,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430447010] [2021-06-05 15:19:18,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:19:18,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:19:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:19:18,917 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:19,237 INFO L93 Difference]: Finished difference Result 107 states and 185 transitions. [2021-06-05 15:19:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:19:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-06-05 15:19:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:19,248 INFO L225 Difference]: With dead ends: 107 [2021-06-05 15:19:19,248 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 15:19:19,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:19:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 15:19:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2021-06-05 15:19:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-06-05 15:19:19,260 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-06-05 15:19:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:19,261 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-06-05 15:19:19,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-06-05 15:19:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:19:19,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:19,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:19,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 15:19:19,463 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:19,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1709225731, now seen corresponding path program 2 times [2021-06-05 15:19:19,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:19,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105250223] [2021-06-05 15:19:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:19,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:19,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105250223] [2021-06-05 15:19:19,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105250223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:19,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830733152] [2021-06-05 15:19:19,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:19,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:19,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:19,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:19,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830733152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:19,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:19,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:19:19,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784744217] [2021-06-05 15:19:19,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:19:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:19,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:19:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:19:19,860 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:20,295 INFO L93 Difference]: Finished difference Result 117 states and 198 transitions. [2021-06-05 15:19:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:19:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-06-05 15:19:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:20,299 INFO L225 Difference]: With dead ends: 117 [2021-06-05 15:19:20,299 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 15:19:20,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 522.8ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:19:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 15:19:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 46. [2021-06-05 15:19:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-06-05 15:19:20,316 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-06-05 15:19:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:20,317 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-06-05 15:19:20,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-06-05 15:19:20,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:19:20,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:20,318 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:20,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:20,542 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:20,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:20,543 INFO L82 PathProgramCache]: Analyzing trace with hash -351634071, now seen corresponding path program 3 times [2021-06-05 15:19:20,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:20,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676881208] [2021-06-05 15:19:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:20,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:20,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676881208] [2021-06-05 15:19:20,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676881208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:20,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576909531] [2021-06-05 15:19:20,654 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 [2021-06-05 15:19:20,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:19:20,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:20,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576909531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:20,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:20,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:19:20,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446858347] [2021-06-05 15:19:20,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:19:20,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:20,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:19:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:19:20,913 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:21,237 INFO L93 Difference]: Finished difference Result 94 states and 156 transitions. [2021-06-05 15:19:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:19:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-06-05 15:19:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:21,238 INFO L225 Difference]: With dead ends: 94 [2021-06-05 15:19:21,238 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 15:19:21,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:19:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 15:19:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-06-05 15:19:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 93 transitions. [2021-06-05 15:19:21,241 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 93 transitions. Word has length 17 [2021-06-05 15:19:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:21,241 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 93 transitions. [2021-06-05 15:19:21,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 93 transitions. [2021-06-05 15:19:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:19:21,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:21,242 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:21,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:21,457 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:21,458 INFO L82 PathProgramCache]: Analyzing trace with hash -886863873, now seen corresponding path program 4 times [2021-06-05 15:19:21,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:21,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879297926] [2021-06-05 15:19:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:21,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:21,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879297926] [2021-06-05 15:19:21,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879297926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:21,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026734107] [2021-06-05 15:19:21,557 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 [2021-06-05 15:19:21,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:21,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:21,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:21,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:21,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026734107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:21,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:21,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:19:21,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822986581] [2021-06-05 15:19:21,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:19:21,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:21,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:19:21,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:19:21,824 INFO L87 Difference]: Start difference. First operand 52 states and 93 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:22,134 INFO L93 Difference]: Finished difference Result 87 states and 147 transitions. [2021-06-05 15:19:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:19:22,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-06-05 15:19:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:22,136 INFO L225 Difference]: With dead ends: 87 [2021-06-05 15:19:22,136 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 15:19:22,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:19:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 15:19:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-06-05 15:19:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-06-05 15:19:22,150 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-06-05 15:19:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:22,151 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-06-05 15:19:22,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-06-05 15:19:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:19:22,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:22,153 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:22,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:22,354 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:22,355 INFO L82 PathProgramCache]: Analyzing trace with hash -980318313, now seen corresponding path program 1 times [2021-06-05 15:19:22,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:22,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32442407] [2021-06-05 15:19:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:22,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:22,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32442407] [2021-06-05 15:19:22,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32442407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:22,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565613797] [2021-06-05 15:19:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:22,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:19:22,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:22,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565613797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:22,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:22,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:19:22,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338856984] [2021-06-05 15:19:22,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:19:22,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:19:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:22,704 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:23,000 INFO L93 Difference]: Finished difference Result 113 states and 197 transitions. [2021-06-05 15:19:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:19:23,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:19:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:23,002 INFO L225 Difference]: With dead ends: 113 [2021-06-05 15:19:23,002 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 15:19:23,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:19:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 15:19:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-06-05 15:19:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.849056603773585) internal successors, (98), 53 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 98 transitions. [2021-06-05 15:19:23,005 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 98 transitions. Word has length 19 [2021-06-05 15:19:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:23,005 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 98 transitions. [2021-06-05 15:19:23,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 98 transitions. [2021-06-05 15:19:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:19:23,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:23,006 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:23,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 15:19:23,223 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2049721123, now seen corresponding path program 2 times [2021-06-05 15:19:23,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:23,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094827184] [2021-06-05 15:19:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:23,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:23,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094827184] [2021-06-05 15:19:23,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094827184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:23,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384046190] [2021-06-05 15:19:23,339 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:23,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:23,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:23,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:19:23,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:23,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384046190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:23,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:23,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:19:23,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936837211] [2021-06-05 15:19:23,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:19:23,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:23,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:19:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:23,611 INFO L87 Difference]: Start difference. First operand 54 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:23,997 INFO L93 Difference]: Finished difference Result 120 states and 202 transitions. [2021-06-05 15:19:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:19:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:19:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:23,999 INFO L225 Difference]: With dead ends: 120 [2021-06-05 15:19:23,999 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 15:19:23,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:19:24,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 15:19:24,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-06-05 15:19:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 101 transitions. [2021-06-05 15:19:24,003 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 101 transitions. Word has length 19 [2021-06-05 15:19:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:24,003 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 101 transitions. [2021-06-05 15:19:24,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 101 transitions. [2021-06-05 15:19:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:19:24,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:24,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:24,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:24,213 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1109060901, now seen corresponding path program 3 times [2021-06-05 15:19:24,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:24,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714851179] [2021-06-05 15:19:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:24,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:24,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714851179] [2021-06-05 15:19:24,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714851179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:24,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617218790] [2021-06-05 15:19:24,353 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:24,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:19:24,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:19:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:24,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617218790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:24,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:24,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:19:24,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111473046] [2021-06-05 15:19:24,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:19:24,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:24,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:19:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:24,592 INFO L87 Difference]: Start difference. First operand 56 states and 101 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:24,979 INFO L93 Difference]: Finished difference Result 130 states and 216 transitions. [2021-06-05 15:19:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:19:24,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:19:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:24,980 INFO L225 Difference]: With dead ends: 130 [2021-06-05 15:19:24,980 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 15:19:24,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:19:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 15:19:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2021-06-05 15:19:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 120 transitions. [2021-06-05 15:19:24,984 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 120 transitions. Word has length 19 [2021-06-05 15:19:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:24,984 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 120 transitions. [2021-06-05 15:19:24,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 120 transitions. [2021-06-05 15:19:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:19:24,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:24,985 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:25,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:25,208 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash -458991931, now seen corresponding path program 4 times [2021-06-05 15:19:25,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:25,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874492857] [2021-06-05 15:19:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:25,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:25,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874492857] [2021-06-05 15:19:25,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874492857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:25,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345672420] [2021-06-05 15:19:25,311 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:25,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:19:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345672420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:19:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882400867] [2021-06-05 15:19:25,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:19:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:19:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:25,543 INFO L87 Difference]: Start difference. First operand 65 states and 120 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:25,913 INFO L93 Difference]: Finished difference Result 106 states and 184 transitions. [2021-06-05 15:19:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:19:25,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:19:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:25,914 INFO L225 Difference]: With dead ends: 106 [2021-06-05 15:19:25,914 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 15:19:25,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:19:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 15:19:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-06-05 15:19:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 66 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2021-06-05 15:19:25,917 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 19 [2021-06-05 15:19:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:25,917 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2021-06-05 15:19:25,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:25,917 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2021-06-05 15:19:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:19:25,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:25,918 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:26,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:19:26,137 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:26,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2036952865, now seen corresponding path program 5 times [2021-06-05 15:19:26,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:26,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947872982] [2021-06-05 15:19:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:26,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:26,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947872982] [2021-06-05 15:19:26,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947872982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:26,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112485960] [2021-06-05 15:19:26,263 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:26,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:19:26,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:19:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:26,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112485960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:26,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:26,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:19:26,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012171199] [2021-06-05 15:19:26,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:19:26,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:26,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:19:26,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:26,495 INFO L87 Difference]: Start difference. First operand 67 states and 123 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:26,673 INFO L93 Difference]: Finished difference Result 95 states and 164 transitions. [2021-06-05 15:19:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:19:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:19:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:26,674 INFO L225 Difference]: With dead ends: 95 [2021-06-05 15:19:26,674 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 15:19:26,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:19:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 15:19:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-06-05 15:19:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 117 transitions. [2021-06-05 15:19:26,677 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 117 transitions. Word has length 19 [2021-06-05 15:19:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:26,677 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 117 transitions. [2021-06-05 15:19:26,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 117 transitions. [2021-06-05 15:19:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:19:26,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:26,678 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:26,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:26,893 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash -900767593, now seen corresponding path program 6 times [2021-06-05 15:19:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:26,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112193018] [2021-06-05 15:19:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:27,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:27,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112193018] [2021-06-05 15:19:27,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112193018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:27,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44849645] [2021-06-05 15:19:27,016 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:27,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:19:27,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:19:27,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:27,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44849645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:27,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:27,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:19:27,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993751422] [2021-06-05 15:19:27,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:19:27,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:19:27,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:27,243 INFO L87 Difference]: Start difference. First operand 64 states and 117 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:27,354 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2021-06-05 15:19:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:19:27,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:19:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:27,355 INFO L225 Difference]: With dead ends: 86 [2021-06-05 15:19:27,355 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 15:19:27,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 15:19:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-06-05 15:19:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 58 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2021-06-05 15:19:27,358 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 19 [2021-06-05 15:19:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:27,358 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2021-06-05 15:19:27,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2021-06-05 15:19:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:19:27,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:27,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:27,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:27,573 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:27,573 INFO L82 PathProgramCache]: Analyzing trace with hash -250698623, now seen corresponding path program 7 times [2021-06-05 15:19:27,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:27,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115237031] [2021-06-05 15:19:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:27,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:27,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115237031] [2021-06-05 15:19:27,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115237031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:27,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468002949] [2021-06-05 15:19:27,680 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:27,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:19:27,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:27,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468002949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:27,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:27,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:19:27,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521889317] [2021-06-05 15:19:27,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:19:27,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:19:27,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:27,945 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:28,075 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-06-05 15:19:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:19:28,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:19:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:28,076 INFO L225 Difference]: With dead ends: 74 [2021-06-05 15:19:28,076 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 15:19:28,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 15:19:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-06-05 15:19:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 100 transitions. [2021-06-05 15:19:28,079 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 100 transitions. Word has length 19 [2021-06-05 15:19:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:28,079 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 100 transitions. [2021-06-05 15:19:28,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 100 transitions. [2021-06-05 15:19:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:28,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:28,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:28,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 15:19:28,297 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash 798154329, now seen corresponding path program 8 times [2021-06-05 15:19:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:28,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571992880] [2021-06-05 15:19:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:28,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:28,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571992880] [2021-06-05 15:19:28,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571992880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:28,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746244563] [2021-06-05 15:19:28,413 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:28,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:28,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746244563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:28,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:28,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 15:19:28,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323666517] [2021-06-05 15:19:28,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:19:28,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:28,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:19:28,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:19:28,673 INFO L87 Difference]: Start difference. First operand 56 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:29,267 INFO L93 Difference]: Finished difference Result 107 states and 190 transitions. [2021-06-05 15:19:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:19:29,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:29,268 INFO L225 Difference]: With dead ends: 107 [2021-06-05 15:19:29,268 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 15:19:29,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:19:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 15:19:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-06-05 15:19:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 87 transitions. [2021-06-05 15:19:29,270 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 87 transitions. Word has length 21 [2021-06-05 15:19:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:29,270 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 87 transitions. [2021-06-05 15:19:29,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 87 transitions. [2021-06-05 15:19:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:29,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:29,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:29,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:19:29,493 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash -466773531, now seen corresponding path program 9 times [2021-06-05 15:19:29,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:29,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144585098] [2021-06-05 15:19:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:29,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:29,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144585098] [2021-06-05 15:19:29,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144585098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:29,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506464694] [2021-06-05 15:19:29,605 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:29,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:19:29,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:29,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:29,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506464694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:29,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:29,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 15:19:29,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791924872] [2021-06-05 15:19:29,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:19:29,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:19:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:19:29,833 INFO L87 Difference]: Start difference. First operand 51 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:30,509 INFO L93 Difference]: Finished difference Result 85 states and 141 transitions. [2021-06-05 15:19:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:19:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:30,510 INFO L225 Difference]: With dead ends: 85 [2021-06-05 15:19:30,510 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 15:19:30,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 722.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:19:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 15:19:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-06-05 15:19:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 81 transitions. [2021-06-05 15:19:30,512 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 81 transitions. Word has length 21 [2021-06-05 15:19:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:30,512 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 81 transitions. [2021-06-05 15:19:30,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 81 transitions. [2021-06-05 15:19:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:30,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:30,513 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:30,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:19:30,725 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash 669411741, now seen corresponding path program 10 times [2021-06-05 15:19:30,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:30,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002325388] [2021-06-05 15:19:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:30,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:30,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002325388] [2021-06-05 15:19:30,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002325388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:30,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207033464] [2021-06-05 15:19:30,812 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:30,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:30,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:31,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207033464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:31,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:31,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 15:19:31,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843423465] [2021-06-05 15:19:31,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:19:31,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:31,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:19:31,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:19:31,061 INFO L87 Difference]: Start difference. First operand 48 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:31,925 INFO L93 Difference]: Finished difference Result 90 states and 147 transitions. [2021-06-05 15:19:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:19:31,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:31,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:31,926 INFO L225 Difference]: With dead ends: 90 [2021-06-05 15:19:31,926 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 15:19:31,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 891.8ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:19:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 15:19:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-06-05 15:19:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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) [2021-06-05 15:19:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-06-05 15:19:31,929 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-06-05 15:19:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:31,929 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-06-05 15:19:31,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-06-05 15:19:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:31,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:31,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:32,133 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1319480711, now seen corresponding path program 11 times [2021-06-05 15:19:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280792920] [2021-06-05 15:19:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:32,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280792920] [2021-06-05 15:19:32,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280792920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086567492] [2021-06-05 15:19:32,241 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:32,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:19:32,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:32,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086567492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:32,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:32,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 15:19:32,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923248801] [2021-06-05 15:19:32,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:19:32,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:32,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:19:32,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:19:32,453 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:33,388 INFO L93 Difference]: Finished difference Result 79 states and 133 transitions. [2021-06-05 15:19:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:19:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:33,389 INFO L225 Difference]: With dead ends: 79 [2021-06-05 15:19:33,389 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 15:19:33,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 941.8ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:19:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 15:19:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-06-05 15:19:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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) [2021-06-05 15:19:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-06-05 15:19:33,391 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-06-05 15:19:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:33,391 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-06-05 15:19:33,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-06-05 15:19:33,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:33,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:33,391 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:33,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:19:33,592 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1793458263, now seen corresponding path program 12 times [2021-06-05 15:19:33,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:33,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022073413] [2021-06-05 15:19:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:33,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:33,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022073413] [2021-06-05 15:19:33,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022073413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:33,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934703843] [2021-06-05 15:19:33,696 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:33,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:19:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:33,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:19:33,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:33,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934703843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:33,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:33,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:19:33,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519087931] [2021-06-05 15:19:33,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:33,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:33,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:33,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:33,926 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:34,372 INFO L93 Difference]: Finished difference Result 107 states and 173 transitions. [2021-06-05 15:19:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:19:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:34,373 INFO L225 Difference]: With dead ends: 107 [2021-06-05 15:19:34,373 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 15:19:34,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 15:19:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2021-06-05 15:19:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 87 transitions. [2021-06-05 15:19:34,376 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 87 transitions. Word has length 21 [2021-06-05 15:19:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:34,376 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 87 transitions. [2021-06-05 15:19:34,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 87 transitions. [2021-06-05 15:19:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:34,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:34,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:34,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:19:34,585 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1615710753, now seen corresponding path program 13 times [2021-06-05 15:19:34,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:34,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98705372] [2021-06-05 15:19:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:34,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:34,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98705372] [2021-06-05 15:19:34,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98705372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:34,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257255282] [2021-06-05 15:19:34,690 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:34,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:34,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:34,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257255282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:34,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:34,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:19:34,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248190535] [2021-06-05 15:19:34,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:34,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:34,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:34,911 INFO L87 Difference]: Start difference. First operand 49 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:35,309 INFO L93 Difference]: Finished difference Result 114 states and 189 transitions. [2021-06-05 15:19:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:19:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:35,310 INFO L225 Difference]: With dead ends: 114 [2021-06-05 15:19:35,310 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 15:19:35,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 15:19:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2021-06-05 15:19:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2021-06-05 15:19:35,312 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 21 [2021-06-05 15:19:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:35,312 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2021-06-05 15:19:35,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2021-06-05 15:19:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:35,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:35,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:35,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:35,529 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash 603018221, now seen corresponding path program 14 times [2021-06-05 15:19:35,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:35,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727204376] [2021-06-05 15:19:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:35,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727204376] [2021-06-05 15:19:35,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727204376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299858121] [2021-06-05 15:19:35,636 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:35,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:35,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:19:35,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:35,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299858121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:35,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:35,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:19:35,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907286142] [2021-06-05 15:19:35,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:35,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:35,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:35,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:35,918 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:36,539 INFO L93 Difference]: Finished difference Result 182 states and 297 transitions. [2021-06-05 15:19:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:19:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:36,540 INFO L225 Difference]: With dead ends: 182 [2021-06-05 15:19:36,540 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 15:19:36,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 665.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:19:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 15:19:36,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2021-06-05 15:19:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 104 transitions. [2021-06-05 15:19:36,543 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 104 transitions. Word has length 21 [2021-06-05 15:19:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:36,543 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 104 transitions. [2021-06-05 15:19:36,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 104 transitions. [2021-06-05 15:19:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:36,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:36,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:36,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:36,757 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash 67788419, now seen corresponding path program 15 times [2021-06-05 15:19:36,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:36,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558632748] [2021-06-05 15:19:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:36,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:36,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558632748] [2021-06-05 15:19:36,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558632748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:36,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740819251] [2021-06-05 15:19:36,861 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:36,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:19:36,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:36,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:36,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:37,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740819251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:37,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:37,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:19:37,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105398822] [2021-06-05 15:19:37,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:37,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:37,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:37,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:37,073 INFO L87 Difference]: Start difference. First operand 55 states and 104 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:37,616 INFO L93 Difference]: Finished difference Result 143 states and 238 transitions. [2021-06-05 15:19:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:19:37,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:37,617 INFO L225 Difference]: With dead ends: 143 [2021-06-05 15:19:37,617 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 15:19:37,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 590.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:19:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 15:19:37,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2021-06-05 15:19:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 83 transitions. [2021-06-05 15:19:37,620 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 83 transitions. Word has length 21 [2021-06-05 15:19:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:37,620 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 83 transitions. [2021-06-05 15:19:37,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 83 transitions. [2021-06-05 15:19:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:37,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:37,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:37,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:37,829 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 770739301, now seen corresponding path program 16 times [2021-06-05 15:19:37,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:37,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005157072] [2021-06-05 15:19:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:37,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005157072] [2021-06-05 15:19:37,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005157072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000247742] [2021-06-05 15:19:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:37,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:37,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:37,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:37,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:38,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000247742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:38,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:38,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:19:38,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762235426] [2021-06-05 15:19:38,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:38,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:38,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:38,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:38,161 INFO L87 Difference]: Start difference. First operand 47 states and 83 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:38,500 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2021-06-05 15:19:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:19:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:38,501 INFO L225 Difference]: With dead ends: 97 [2021-06-05 15:19:38,501 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 15:19:38,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:19:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 15:19:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-06-05 15:19:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 62 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2021-06-05 15:19:38,503 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 21 [2021-06-05 15:19:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:38,503 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2021-06-05 15:19:38,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2021-06-05 15:19:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:38,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:38,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:38,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:19:38,717 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -241953231, now seen corresponding path program 17 times [2021-06-05 15:19:38,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:38,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013669980] [2021-06-05 15:19:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:38,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:38,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013669980] [2021-06-05 15:19:38,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013669980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:38,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35953971] [2021-06-05 15:19:38,807 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:38,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:19:38,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:38,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:19:38,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:39,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35953971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:39,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:39,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:19:39,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108700557] [2021-06-05 15:19:39,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:39,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:39,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:39,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:39,063 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:39,556 INFO L93 Difference]: Finished difference Result 133 states and 227 transitions. [2021-06-05 15:19:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:19:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:39,557 INFO L225 Difference]: With dead ends: 133 [2021-06-05 15:19:39,557 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 15:19:39,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 573.2ms TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:19:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 15:19:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2021-06-05 15:19:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 66 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 126 transitions. [2021-06-05 15:19:39,560 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 126 transitions. Word has length 21 [2021-06-05 15:19:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:39,560 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 126 transitions. [2021-06-05 15:19:39,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 126 transitions. [2021-06-05 15:19:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:19:39,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:39,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:39,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:19:39,777 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:39,777 INFO L82 PathProgramCache]: Analyzing trace with hash -777183033, now seen corresponding path program 18 times [2021-06-05 15:19:39,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:39,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616080079] [2021-06-05 15:19:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:39,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:39,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616080079] [2021-06-05 15:19:39,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616080079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:39,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187312141] [2021-06-05 15:19:39,869 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:39,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:19:39,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:19:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:40,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187312141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:40,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:40,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:19:40,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042525619] [2021-06-05 15:19:40,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:40,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:40,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:40,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:40,124 INFO L87 Difference]: Start difference. First operand 67 states and 126 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:40,667 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-06-05 15:19:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:19:40,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:19:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:40,668 INFO L225 Difference]: With dead ends: 111 [2021-06-05 15:19:40,668 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 15:19:40,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:19:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 15:19:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2021-06-05 15:19:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 99 transitions. [2021-06-05 15:19:40,670 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 99 transitions. Word has length 21 [2021-06-05 15:19:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:40,671 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 99 transitions. [2021-06-05 15:19:40,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 99 transitions. [2021-06-05 15:19:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:19:40,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:40,671 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:40,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:40,885 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:40,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2078233109, now seen corresponding path program 19 times [2021-06-05 15:19:40,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:40,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990917285] [2021-06-05 15:19:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:19:40,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990917285] [2021-06-05 15:19:40,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990917285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081054517] [2021-06-05 15:19:40,970 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:40,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:19:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:41,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081054517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:41,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:41,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 15:19:41,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065844142] [2021-06-05 15:19:41,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:41,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:41,197 INFO L87 Difference]: Start difference. First operand 57 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:41,718 INFO L93 Difference]: Finished difference Result 109 states and 188 transitions. [2021-06-05 15:19:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:19:41,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:19:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:41,719 INFO L225 Difference]: With dead ends: 109 [2021-06-05 15:19:41,719 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 15:19:41,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:19:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 15:19:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2021-06-05 15:19:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 60 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2021-06-05 15:19:41,722 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 23 [2021-06-05 15:19:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:41,722 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2021-06-05 15:19:41,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2021-06-05 15:19:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:19:41,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:41,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:41,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:19:41,929 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1330935907, now seen corresponding path program 20 times [2021-06-05 15:19:41,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:41,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8023677] [2021-06-05 15:19:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:42,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:42,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8023677] [2021-06-05 15:19:42,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8023677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:42,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152454505] [2021-06-05 15:19:42,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:42,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:42,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:42,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:19:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:42,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152454505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:42,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:42,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 15:19:42,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394888153] [2021-06-05 15:19:42,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:42,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:42,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:42,276 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:42,773 INFO L93 Difference]: Finished difference Result 120 states and 210 transitions. [2021-06-05 15:19:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:19:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:19:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:42,776 INFO L225 Difference]: With dead ends: 120 [2021-06-05 15:19:42,776 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 15:19:42,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 563.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:19:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 15:19:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2021-06-05 15:19:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 108 transitions. [2021-06-05 15:19:42,779 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 108 transitions. Word has length 23 [2021-06-05 15:19:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:42,779 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 108 transitions. [2021-06-05 15:19:42,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 108 transitions. [2021-06-05 15:19:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:19:42,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:42,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:42,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:42,993 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash 318243375, now seen corresponding path program 21 times [2021-06-05 15:19:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:42,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062013023] [2021-06-05 15:19:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:43,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:43,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062013023] [2021-06-05 15:19:43,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062013023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:43,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711910715] [2021-06-05 15:19:43,082 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:43,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:19:43,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:43,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:19:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:43,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711910715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:43,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:43,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 15:19:43,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347317852] [2021-06-05 15:19:43,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:43,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:43,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:43,358 INFO L87 Difference]: Start difference. First operand 61 states and 108 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:44,167 INFO L93 Difference]: Finished difference Result 116 states and 202 transitions. [2021-06-05 15:19:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:19:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:19:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:44,168 INFO L225 Difference]: With dead ends: 116 [2021-06-05 15:19:44,168 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 15:19:44,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:19:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 15:19:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-06-05 15:19:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 58 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-06-05 15:19:44,171 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 23 [2021-06-05 15:19:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:44,171 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-06-05 15:19:44,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-06-05 15:19:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:19:44,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:44,172 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:44,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:19:44,385 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:44,385 INFO L82 PathProgramCache]: Analyzing trace with hash -216986427, now seen corresponding path program 22 times [2021-06-05 15:19:44,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:44,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577586671] [2021-06-05 15:19:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:44,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577586671] [2021-06-05 15:19:44,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577586671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10588440] [2021-06-05 15:19:44,477 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:44,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:44,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:44,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:19:44,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:44,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10588440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:44,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:44,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 15:19:44,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592447879] [2021-06-05 15:19:44,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:44,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:44,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:44,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:44,714 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:45,259 INFO L93 Difference]: Finished difference Result 92 states and 163 transitions. [2021-06-05 15:19:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:19:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:19:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:45,259 INFO L225 Difference]: With dead ends: 92 [2021-06-05 15:19:45,259 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 15:19:45,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1380, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:19:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 15:19:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 15:19:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 15:19:45,260 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-06-05 15:19:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:45,260 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 15:19:45,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 15:19:45,261 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 15:19:45,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:19:45,474 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:19:45,476 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:19:45 BasicIcfg [2021-06-05 15:19:45,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:19:45,476 INFO L168 Benchmark]: Toolchain (without parser) took 28424.65 ms. Allocated memory was 335.5 MB in the beginning and 402.7 MB in the end (delta: 67.1 MB). Free memory was 315.1 MB in the beginning and 155.0 MB in the end (delta: 160.1 MB). Peak memory consumption was 230.3 MB. Max. memory is 16.0 GB. [2021-06-05 15:19:45,477 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 335.5 MB. Free memory was 316.2 MB in the beginning and 316.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:19:45,477 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.61 ms. Allocated memory is still 335.5 MB. Free memory was 315.0 MB in the beginning and 313.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:19:45,477 INFO L168 Benchmark]: Boogie Preprocessor took 13.25 ms. Allocated memory is still 335.5 MB. Free memory was 313.6 MB in the beginning and 312.7 MB in the end (delta: 899.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:19:45,477 INFO L168 Benchmark]: RCFGBuilder took 260.15 ms. Allocated memory is still 335.5 MB. Free memory was 312.6 MB in the beginning and 301.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 15:19:45,477 INFO L168 Benchmark]: TraceAbstraction took 28122.71 ms. Allocated memory was 335.5 MB in the beginning and 402.7 MB in the end (delta: 67.1 MB). Free memory was 300.6 MB in the beginning and 155.0 MB in the end (delta: 145.6 MB). Peak memory consumption was 215.6 MB. Max. memory is 16.0 GB. [2021-06-05 15:19:45,477 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 0.13 ms. Allocated memory is still 335.5 MB. Free memory was 316.2 MB in the beginning and 316.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.61 ms. Allocated memory is still 335.5 MB. Free memory was 315.0 MB in the beginning and 313.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.25 ms. Allocated memory is still 335.5 MB. Free memory was 313.6 MB in the beginning and 312.7 MB in the end (delta: 899.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 260.15 ms. Allocated memory is still 335.5 MB. Free memory was 312.6 MB in the beginning and 301.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 28122.71 ms. Allocated memory was 335.5 MB in the beginning and 402.7 MB in the end (delta: 67.1 MB). Free memory was 300.6 MB in the beginning and 155.0 MB in the end (delta: 145.6 MB). Peak memory consumption was 215.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 51]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28043.1ms, OverallIterations: 28, TraceHistogramMax: 3, EmptinessCheckTime: 19.9ms, AutomataDifference: 12520.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 546 SDtfs, 3102 SDslu, 3645 SDs, 0 SdLazy, 6940 SolverSat, 414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2981.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1218 GetRequests, 289 SyntacticMatches, 26 SemanticMatches, 903 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8019 ImplicationChecksByTransitivity, 14494.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, InterpolantAutomatonStates: 642, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 121.1ms AutomataMinimizationTime, 28 MinimizatonAttempts, 848 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.8ms SsaConstructionTime, 277.5ms SatisfiabilityAnalysisTime, 8725.3ms InterpolantComputationTime, 1078 NumberOfCodeBlocks, 1078 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1024 ConstructedInterpolants, 0 QuantifiedInterpolants, 12797 SizeOfPredicates, 130 NumberOfNonLiveVariables, 1085 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 54 InterpolantComputations, 2 PerfectInterpolantSequences, 14/226 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...