/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/max60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:26:42,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:26:42,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:26:42,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:26:42,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:26:42,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:26:42,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:26:42,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:26:42,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:26:42,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:26:42,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:26:42,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:26:42,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:26:42,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:26:42,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:26:42,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:26:42,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:26:42,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:26:42,708 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:26:42,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:26:42,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:26:42,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:26:42,709 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:26:42,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:26:42,710 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:26:42,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:26:42,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:26:42,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:26:42,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:26:42,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:26:42,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:26:42,713 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:26:42,713 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:26:42,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:26:42,715 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:26:42,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:26:42,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:26:42,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:26:42,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:26:42,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:26:42,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:26:42,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:26:42,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:26:42,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:26:42,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:26:42,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:26:42,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:26:42,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:26:42,976 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:26:42,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:26:43,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:26:43,003 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:26:43,004 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:26:43,005 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max60-2.i [2019-11-23 22:26:43,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abd76c61/af4bcfdb2b314de78f205abf8e3d4126/FLAG77adab60b [2019-11-23 22:26:43,558 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:26:43,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i [2019-11-23 22:26:43,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abd76c61/af4bcfdb2b314de78f205abf8e3d4126/FLAG77adab60b [2019-11-23 22:26:43,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abd76c61/af4bcfdb2b314de78f205abf8e3d4126 [2019-11-23 22:26:43,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:26:43,925 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:26:43,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:26:43,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:26:43,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:26:43,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:43" (1/1) ... [2019-11-23 22:26:43,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec303f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43, skipping insertion in model container [2019-11-23 22:26:43,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:43" (1/1) ... [2019-11-23 22:26:43,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:26:43,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:26:44,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:26:44,154 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:26:44,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:26:44,191 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:26:44,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44 WrapperNode [2019-11-23 22:26:44,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:26:44,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:26:44,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:26:44,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:26:44,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:26:44,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:26:44,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:26:44,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:26:44,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (1/1) ... [2019-11-23 22:26:44,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:26:44,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:26:44,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:26:44,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:26:44,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (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 [2019-11-23 22:26:44,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:26:44,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:26:44,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:26:44,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:26:44,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:26:44,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:26:44,782 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:26:44,782 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:26:44,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:44 BoogieIcfgContainer [2019-11-23 22:26:44,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:26:44,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:26:44,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:26:44,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:26:44,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:26:43" (1/3) ... [2019-11-23 22:26:44,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a06967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:44, skipping insertion in model container [2019-11-23 22:26:44,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:44" (2/3) ... [2019-11-23 22:26:44,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a06967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:44, skipping insertion in model container [2019-11-23 22:26:44,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:44" (3/3) ... [2019-11-23 22:26:44,791 INFO L109 eAbstractionObserver]: Analyzing ICFG max60-2.i [2019-11-23 22:26:44,801 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:26:44,807 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:26:44,818 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:26:44,839 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:26:44,839 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:26:44,839 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:26:44,839 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:26:44,839 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:26:44,840 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:26:44,840 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:26:44,840 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:26:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-23 22:26:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:26:44,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:44,861 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:44,861 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:44,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1332003061, now seen corresponding path program 1 times [2019-11-23 22:26:44,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:44,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429716930] [2019-11-23 22:26:44,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:26:44,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429716930] [2019-11-23 22:26:44,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:44,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:26:44,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724271801] [2019-11-23 22:26:45,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:26:45,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:26:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:26:45,016 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-11-23 22:26:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:45,033 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2019-11-23 22:26:45,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:26:45,034 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-23 22:26:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:45,043 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:26:45,043 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:26:45,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:26:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:26:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:26:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:26:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 22:26:45,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-11-23 22:26:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:45,088 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 22:26:45,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:26:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 22:26:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:26:45,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:45,089 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:45,089 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash 741944299, now seen corresponding path program 1 times [2019-11-23 22:26:45,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:45,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657499423] [2019-11-23 22:26:45,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:26:45,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657499423] [2019-11-23 22:26:45,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:45,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:45,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063812945] [2019-11-23 22:26:45,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:45,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:45,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:45,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:45,168 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2019-11-23 22:26:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:45,199 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2019-11-23 22:26:45,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:45,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:26:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:45,201 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:26:45,201 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:26:45,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:26:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:26:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:26:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-23 22:26:45,211 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2019-11-23 22:26:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:45,212 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-23 22:26:45,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-23 22:26:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:26:45,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:45,213 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:45,213 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:45,214 INFO L82 PathProgramCache]: Analyzing trace with hash -826131671, now seen corresponding path program 1 times [2019-11-23 22:26:45,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:45,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906082709] [2019-11-23 22:26:45,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:26:45,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906082709] [2019-11-23 22:26:45,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:45,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:45,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725047646] [2019-11-23 22:26:45,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:45,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:45,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:45,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:45,266 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2019-11-23 22:26:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:45,339 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2019-11-23 22:26:45,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:45,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:26:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:45,341 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:26:45,341 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:26:45,342 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:26:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-11-23 22:26:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:26:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-23 22:26:45,351 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2019-11-23 22:26:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:45,353 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-23 22:26:45,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-23 22:26:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:26:45,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:45,357 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:45,357 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:45,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1925905852, now seen corresponding path program 1 times [2019-11-23 22:26:45,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:45,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397616144] [2019-11-23 22:26:45,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:45,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397616144] [2019-11-23 22:26:45,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:45,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:45,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505021110] [2019-11-23 22:26:45,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:45,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:45,461 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 3 states. [2019-11-23 22:26:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:45,483 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:26:45,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:45,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-23 22:26:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:45,486 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:26:45,486 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:26:45,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:26:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-23 22:26:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:26:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-11-23 22:26:45,493 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2019-11-23 22:26:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:45,494 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-11-23 22:26:45,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-11-23 22:26:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:26:45,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:45,495 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:45,495 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:45,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1542894914, now seen corresponding path program 1 times [2019-11-23 22:26:45,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:45,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226420015] [2019-11-23 22:26:45,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:45,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226420015] [2019-11-23 22:26:45,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353809456] [2019-11-23 22:26:45,598 INFO L94 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 [2019-11-23 22:26:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:45,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:45,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:45,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:45,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:26:45,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660268754] [2019-11-23 22:26:45,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:26:45,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:45,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:26:45,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:45,724 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-11-23 22:26:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:45,768 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-11-23 22:26:45,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:45,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2019-11-23 22:26:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:45,770 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:26:45,770 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:26:45,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:26:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-23 22:26:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 22:26:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-11-23 22:26:45,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 33 [2019-11-23 22:26:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:45,783 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-11-23 22:26:45,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:26:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-11-23 22:26:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 22:26:45,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:45,809 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:46,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:46,019 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1235585152, now seen corresponding path program 2 times [2019-11-23 22:26:46,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:46,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419422458] [2019-11-23 22:26:46,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:46,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419422458] [2019-11-23 22:26:46,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321692735] [2019-11-23 22:26:46,098 INFO L92 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 [2019-11-23 22:26:46,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:46,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:46,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:46,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:46,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:46,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:26:46,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346409398] [2019-11-23 22:26:46,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:26:46,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:46,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:26:46,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:46,189 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2019-11-23 22:26:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:46,221 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-11-23 22:26:46,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:26:46,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-23 22:26:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:46,222 INFO L225 Difference]: With dead ends: 68 [2019-11-23 22:26:46,222 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:26:46,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:26:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-23 22:26:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:26:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-23 22:26:46,228 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 35 [2019-11-23 22:26:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:46,229 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-23 22:26:46,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:26:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-23 22:26:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:26:46,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:46,230 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:46,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:46,434 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:46,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2031320002, now seen corresponding path program 3 times [2019-11-23 22:26:46,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:46,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472060996] [2019-11-23 22:26:46,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:46,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472060996] [2019-11-23 22:26:46,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067242730] [2019-11-23 22:26:46,560 INFO L92 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 [2019-11-23 22:26:46,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:26:46,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:46,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:46,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:26:46,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:46,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:26:46,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015170012] [2019-11-23 22:26:46,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:26:46,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:46,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:26:46,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:46,667 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 8 states. [2019-11-23 22:26:46,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:46,776 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2019-11-23 22:26:46,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:26:46,777 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2019-11-23 22:26:46,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:46,778 INFO L225 Difference]: With dead ends: 91 [2019-11-23 22:26:46,778 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:26:46,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:46,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:26:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-11-23 22:26:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 22:26:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-23 22:26:46,786 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 37 [2019-11-23 22:26:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:46,786 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-23 22:26:46,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:26:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-23 22:26:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 22:26:46,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:46,788 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:46,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:46,989 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:46,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1702871319, now seen corresponding path program 4 times [2019-11-23 22:26:46,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:46,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834968274] [2019-11-23 22:26:46,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-23 22:26:47,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834968274] [2019-11-23 22:26:47,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677596833] [2019-11-23 22:26:47,130 INFO L92 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 [2019-11-23 22:26:47,209 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:47,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:47,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:26:47,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-23 22:26:47,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:47,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:26:47,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489529191] [2019-11-23 22:26:47,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:26:47,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:26:47,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:47,238 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 8 states. [2019-11-23 22:26:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:47,274 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2019-11-23 22:26:47,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:26:47,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-23 22:26:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:47,277 INFO L225 Difference]: With dead ends: 96 [2019-11-23 22:26:47,277 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 22:26:47,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 22:26:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-23 22:26:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 22:26:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-11-23 22:26:47,289 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 51 [2019-11-23 22:26:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:47,289 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-11-23 22:26:47,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:26:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-11-23 22:26:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:26:47,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:47,293 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:47,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:47,494 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:47,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1048346411, now seen corresponding path program 5 times [2019-11-23 22:26:47,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:47,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352613447] [2019-11-23 22:26:47,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-23 22:26:47,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352613447] [2019-11-23 22:26:47,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915848165] [2019-11-23 22:26:47,629 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:47,731 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:26:47,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:47,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:47,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 22:26:47,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:47,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 22:26:47,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922117439] [2019-11-23 22:26:47,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:26:47,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:26:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:47,774 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 11 states. [2019-11-23 22:26:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:47,896 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2019-11-23 22:26:47,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:26:47,896 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2019-11-23 22:26:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:47,898 INFO L225 Difference]: With dead ends: 119 [2019-11-23 22:26:47,898 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 22:26:47,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 22:26:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2019-11-23 22:26:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 22:26:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2019-11-23 22:26:47,906 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 53 [2019-11-23 22:26:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:47,906 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2019-11-23 22:26:47,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:26:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2019-11-23 22:26:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:26:47,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:47,908 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:48,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:48,121 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:48,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1823697106, now seen corresponding path program 6 times [2019-11-23 22:26:48,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:48,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903827410] [2019-11-23 22:26:48,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-23 22:26:48,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903827410] [2019-11-23 22:26:48,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307404988] [2019-11-23 22:26:48,274 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:48,336 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 22:26:48,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:48,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:48,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 22:26:48,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:48,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2019-11-23 22:26:48,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504270166] [2019-11-23 22:26:48,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:26:48,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:26:48,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:48,398 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 11 states. [2019-11-23 22:26:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:48,453 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2019-11-23 22:26:48,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:26:48,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2019-11-23 22:26:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:48,455 INFO L225 Difference]: With dead ends: 127 [2019-11-23 22:26:48,455 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:26:48,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:26:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-11-23 22:26:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:26:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2019-11-23 22:26:48,463 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 67 [2019-11-23 22:26:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:48,463 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2019-11-23 22:26:48,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:26:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2019-11-23 22:26:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:26:48,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:48,465 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:48,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:48,669 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:48,670 INFO L82 PathProgramCache]: Analyzing trace with hash 376662890, now seen corresponding path program 7 times [2019-11-23 22:26:48,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:48,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037191192] [2019-11-23 22:26:48,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:48,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037191192] [2019-11-23 22:26:48,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934152738] [2019-11-23 22:26:48,799 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:48,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:26:48,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:48,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:48,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:26:48,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610345357] [2019-11-23 22:26:48,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:26:48,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:26:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:48,907 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 11 states. [2019-11-23 22:26:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:48,955 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2019-11-23 22:26:48,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:26:48,956 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2019-11-23 22:26:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:48,957 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:26:48,957 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:26:48,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:26:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 22:26:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 22:26:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2019-11-23 22:26:48,976 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 71 [2019-11-23 22:26:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:48,977 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2019-11-23 22:26:48,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:26:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2019-11-23 22:26:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 22:26:48,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:48,982 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:49,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:49,183 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash -878190552, now seen corresponding path program 8 times [2019-11-23 22:26:49,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:49,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433198353] [2019-11-23 22:26:49,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:49,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433198353] [2019-11-23 22:26:49,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435460236] [2019-11-23 22:26:49,293 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:49,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:49,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:49,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:26:49,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:49,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:49,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:26:49,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36276805] [2019-11-23 22:26:49,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:26:49,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:49,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:26:49,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:26:49,406 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 12 states. [2019-11-23 22:26:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:49,441 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2019-11-23 22:26:49,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:26:49,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-11-23 22:26:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:49,443 INFO L225 Difference]: With dead ends: 132 [2019-11-23 22:26:49,443 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 22:26:49,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:26:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 22:26:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-11-23 22:26:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 22:26:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2019-11-23 22:26:49,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 73 [2019-11-23 22:26:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:49,450 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2019-11-23 22:26:49,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:26:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2019-11-23 22:26:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 22:26:49,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:49,452 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:49,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:49,656 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:49,657 INFO L82 PathProgramCache]: Analyzing trace with hash 93461862, now seen corresponding path program 9 times [2019-11-23 22:26:49,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:49,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536164601] [2019-11-23 22:26:49,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:49,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536164601] [2019-11-23 22:26:49,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911656284] [2019-11-23 22:26:49,774 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:49,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:26:49,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:49,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:49,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 22:26:49,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:49,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-11-23 22:26:49,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476391420] [2019-11-23 22:26:49,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:26:49,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:49,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:26:49,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:26:49,922 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 15 states. [2019-11-23 22:26:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:50,011 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2019-11-23 22:26:50,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:26:50,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2019-11-23 22:26:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:50,033 INFO L225 Difference]: With dead ends: 137 [2019-11-23 22:26:50,033 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:26:50,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:26:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:26:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-11-23 22:26:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:26:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2019-11-23 22:26:50,055 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 75 [2019-11-23 22:26:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:50,056 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2019-11-23 22:26:50,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:26:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2019-11-23 22:26:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:26:50,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:50,060 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:50,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:50,261 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:50,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1555506594, now seen corresponding path program 10 times [2019-11-23 22:26:50,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:50,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840477235] [2019-11-23 22:26:50,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-23 22:26:50,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840477235] [2019-11-23 22:26:50,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562548410] [2019-11-23 22:26:50,414 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:50,492 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:50,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:50,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:26:50,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-23 22:26:50,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:50,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-11-23 22:26:50,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395593037] [2019-11-23 22:26:50,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:26:50,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:26:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:26:50,559 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 17 states. [2019-11-23 22:26:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:50,742 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2019-11-23 22:26:50,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:26:50,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2019-11-23 22:26:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:50,743 INFO L225 Difference]: With dead ends: 161 [2019-11-23 22:26:50,743 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:26:50,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:26:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:26:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2019-11-23 22:26:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 22:26:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2019-11-23 22:26:50,749 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 79 [2019-11-23 22:26:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:50,750 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2019-11-23 22:26:50,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:26:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2019-11-23 22:26:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 22:26:50,751 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:50,752 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:50,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:50,962 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash -361354501, now seen corresponding path program 11 times [2019-11-23 22:26:50,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:50,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912631441] [2019-11-23 22:26:50,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 22:26:51,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912631441] [2019-11-23 22:26:51,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43719312] [2019-11-23 22:26:51,097 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:51,326 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:26:51,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:51,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:26:51,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2019-11-23 22:26:51,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:51,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2019-11-23 22:26:51,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993433098] [2019-11-23 22:26:51,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:26:51,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:51,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:26:51,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:26:51,411 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand 18 states. [2019-11-23 22:26:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:51,490 INFO L93 Difference]: Finished difference Result 169 states and 202 transitions. [2019-11-23 22:26:51,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:26:51,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2019-11-23 22:26:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:51,492 INFO L225 Difference]: With dead ends: 169 [2019-11-23 22:26:51,492 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 22:26:51,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:26:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 22:26:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2019-11-23 22:26:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 22:26:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2019-11-23 22:26:51,501 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 93 [2019-11-23 22:26:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:51,502 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2019-11-23 22:26:51,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:26:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2019-11-23 22:26:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 22:26:51,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:51,503 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:51,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:51,708 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1370395191, now seen corresponding path program 12 times [2019-11-23 22:26:51,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:51,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210268417] [2019-11-23 22:26:51,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:26:51,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210268417] [2019-11-23 22:26:51,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927438743] [2019-11-23 22:26:51,891 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:52,286 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:26:52,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:52,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:26:52,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-11-23 22:26:52,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:52,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:26:52,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418661298] [2019-11-23 22:26:52,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:26:52,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:52,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:26:52,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:52,353 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand 20 states. [2019-11-23 22:26:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:52,447 INFO L93 Difference]: Finished difference Result 175 states and 208 transitions. [2019-11-23 22:26:52,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:26:52,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2019-11-23 22:26:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:52,448 INFO L225 Difference]: With dead ends: 175 [2019-11-23 22:26:52,448 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:26:52,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:26:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-11-23 22:26:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 22:26:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2019-11-23 22:26:52,453 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 97 [2019-11-23 22:26:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:52,454 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2019-11-23 22:26:52,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:26:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2019-11-23 22:26:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 22:26:52,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:52,455 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:52,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:52,660 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:52,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:52,661 INFO L82 PathProgramCache]: Analyzing trace with hash -259880077, now seen corresponding path program 13 times [2019-11-23 22:26:52,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:52,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118489252] [2019-11-23 22:26:52,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:52,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118489252] [2019-11-23 22:26:52,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289823023] [2019-11-23 22:26:52,840 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:52,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:26:52,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:52,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:52,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:26:52,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716760720] [2019-11-23 22:26:52,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:26:52,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:52,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:26:52,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:26:52,979 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 17 states. [2019-11-23 22:26:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:53,038 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2019-11-23 22:26:53,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:26:53,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2019-11-23 22:26:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:53,040 INFO L225 Difference]: With dead ends: 178 [2019-11-23 22:26:53,040 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 22:26:53,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:26:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 22:26:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-23 22:26:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 22:26:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2019-11-23 22:26:53,047 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 101 [2019-11-23 22:26:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:53,049 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2019-11-23 22:26:53,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:26:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2019-11-23 22:26:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 22:26:53,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:53,051 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:53,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:53,256 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:53,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1841782863, now seen corresponding path program 14 times [2019-11-23 22:26:53,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:53,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397474248] [2019-11-23 22:26:53,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:53,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397474248] [2019-11-23 22:26:53,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086748952] [2019-11-23 22:26:53,484 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:53,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:53,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:53,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:26:53,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:53,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:53,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:26:53,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508426380] [2019-11-23 22:26:53,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:26:53,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:26:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:26:53,592 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 18 states. [2019-11-23 22:26:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:53,650 INFO L93 Difference]: Finished difference Result 180 states and 212 transitions. [2019-11-23 22:26:53,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:26:53,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2019-11-23 22:26:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:53,652 INFO L225 Difference]: With dead ends: 180 [2019-11-23 22:26:53,652 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 22:26:53,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:26:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 22:26:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-11-23 22:26:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 22:26:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2019-11-23 22:26:53,660 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 103 [2019-11-23 22:26:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:53,660 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2019-11-23 22:26:53,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:26:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2019-11-23 22:26:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 22:26:53,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:53,661 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:53,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:53,865 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1631937425, now seen corresponding path program 15 times [2019-11-23 22:26:53,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:53,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766082379] [2019-11-23 22:26:53,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:54,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766082379] [2019-11-23 22:26:54,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444412514] [2019-11-23 22:26:54,083 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:54,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:26:54,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:54,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:26:54,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-11-23 22:26:54,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:54,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7] total 23 [2019-11-23 22:26:54,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120760606] [2019-11-23 22:26:54,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:26:54,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:54,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:26:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:26:54,289 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand 23 states. [2019-11-23 22:26:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:54,530 INFO L93 Difference]: Finished difference Result 203 states and 244 transitions. [2019-11-23 22:26:54,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:26:54,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2019-11-23 22:26:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:54,532 INFO L225 Difference]: With dead ends: 203 [2019-11-23 22:26:54,532 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 22:26:54,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:26:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 22:26:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 120. [2019-11-23 22:26:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 22:26:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2019-11-23 22:26:54,538 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 105 [2019-11-23 22:26:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:54,538 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2019-11-23 22:26:54,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:26:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2019-11-23 22:26:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 22:26:54,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:54,539 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:54,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:54,744 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:54,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2012967112, now seen corresponding path program 16 times [2019-11-23 22:26:54,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:54,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002977753] [2019-11-23 22:26:54,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:54,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002977753] [2019-11-23 22:26:54,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46373617] [2019-11-23 22:26:54,952 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:55,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:55,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:55,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:26:55,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:55,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:55,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:26:55,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164220742] [2019-11-23 22:26:55,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:26:55,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:26:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:55,088 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 20 states. [2019-11-23 22:26:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:55,154 INFO L93 Difference]: Finished difference Result 208 states and 246 transitions. [2019-11-23 22:26:55,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:26:55,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2019-11-23 22:26:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:55,155 INFO L225 Difference]: With dead ends: 208 [2019-11-23 22:26:55,155 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:26:55,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:26:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-11-23 22:26:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 22:26:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2019-11-23 22:26:55,160 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 119 [2019-11-23 22:26:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:55,161 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2019-11-23 22:26:55,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:26:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2019-11-23 22:26:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 22:26:55,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:55,162 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:55,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:55,366 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:55,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1998074246, now seen corresponding path program 17 times [2019-11-23 22:26:55,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:55,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442865384] [2019-11-23 22:26:55,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:55,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442865384] [2019-11-23 22:26:55,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548378365] [2019-11-23 22:26:55,594 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:56,410 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:26:56,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:56,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:26:56,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:56,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:56,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:26:56,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591990979] [2019-11-23 22:26:56,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:26:56,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:26:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:26:56,439 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 21 states. [2019-11-23 22:26:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:56,522 INFO L93 Difference]: Finished difference Result 210 states and 248 transitions. [2019-11-23 22:26:56,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:26:56,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 121 [2019-11-23 22:26:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:56,524 INFO L225 Difference]: With dead ends: 210 [2019-11-23 22:26:56,524 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 22:26:56,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:26:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 22:26:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-11-23 22:26:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 22:26:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2019-11-23 22:26:56,529 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 121 [2019-11-23 22:26:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:56,529 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2019-11-23 22:26:56,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:26:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2019-11-23 22:26:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 22:26:56,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:56,530 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:56,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:56,733 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:56,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:56,734 INFO L82 PathProgramCache]: Analyzing trace with hash 570931908, now seen corresponding path program 18 times [2019-11-23 22:26:56,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:56,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421694311] [2019-11-23 22:26:56,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:57,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421694311] [2019-11-23 22:26:57,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619731645] [2019-11-23 22:26:57,057 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:57,551 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:26:57,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:57,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:26:57,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2019-11-23 22:26:57,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:57,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2019-11-23 22:26:57,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826278363] [2019-11-23 22:26:57,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:26:57,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:57,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:26:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:26:57,716 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand 29 states. [2019-11-23 22:26:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:58,008 INFO L93 Difference]: Finished difference Result 234 states and 282 transitions. [2019-11-23 22:26:58,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:26:58,011 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 123 [2019-11-23 22:26:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:58,013 INFO L225 Difference]: With dead ends: 234 [2019-11-23 22:26:58,013 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 22:26:58,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:26:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 22:26:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2019-11-23 22:26:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 22:26:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2019-11-23 22:26:58,019 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 123 [2019-11-23 22:26:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:58,019 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2019-11-23 22:26:58,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:26:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2019-11-23 22:26:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 22:26:58,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:58,020 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:58,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:58,225 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:58,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1966928219, now seen corresponding path program 19 times [2019-11-23 22:26:58,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:58,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207918737] [2019-11-23 22:26:58,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:58,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207918737] [2019-11-23 22:26:58,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324756925] [2019-11-23 22:26:58,511 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:58,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:26:58,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:58,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:58,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:26:58,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217344947] [2019-11-23 22:26:58,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:26:58,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:58,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:26:58,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:26:58,664 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 24 states. [2019-11-23 22:26:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:58,723 INFO L93 Difference]: Finished difference Result 240 states and 284 transitions. [2019-11-23 22:26:58,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:26:58,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2019-11-23 22:26:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:58,725 INFO L225 Difference]: With dead ends: 240 [2019-11-23 22:26:58,725 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 22:26:58,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:26:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 22:26:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 22:26:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 22:26:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2019-11-23 22:26:58,730 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 139 [2019-11-23 22:26:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:58,730 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2019-11-23 22:26:58,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:26:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2019-11-23 22:26:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 22:26:58,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:58,731 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:58,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:58,932 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash -536877287, now seen corresponding path program 20 times [2019-11-23 22:26:58,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:58,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69572739] [2019-11-23 22:26:58,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:59,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69572739] [2019-11-23 22:26:59,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921855850] [2019-11-23 22:26:59,266 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:59,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:59,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:59,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:26:59,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:59,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:59,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 22:26:59,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435040924] [2019-11-23 22:26:59,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:26:59,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:59,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:26:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:26:59,392 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand 25 states. [2019-11-23 22:26:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:59,508 INFO L93 Difference]: Finished difference Result 242 states and 286 transitions. [2019-11-23 22:26:59,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:26:59,510 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 141 [2019-11-23 22:26:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:59,511 INFO L225 Difference]: With dead ends: 242 [2019-11-23 22:26:59,511 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 22:26:59,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:26:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 22:26:59,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-11-23 22:26:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-23 22:26:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2019-11-23 22:26:59,517 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 141 [2019-11-23 22:26:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:59,517 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2019-11-23 22:26:59,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:26:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2019-11-23 22:26:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 22:26:59,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:59,519 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:59,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:59,727 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1512282793, now seen corresponding path program 21 times [2019-11-23 22:26:59,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:59,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942000958] [2019-11-23 22:26:59,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:27:00,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942000958] [2019-11-23 22:27:00,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348689061] [2019-11-23 22:27:00,216 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:00,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:27:00,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:00,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:27:00,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2019-11-23 22:27:00,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:00,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2019-11-23 22:27:00,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282362795] [2019-11-23 22:27:00,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:27:00,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:00,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:27:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:27:00,637 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand 31 states. [2019-11-23 22:27:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:00,752 INFO L93 Difference]: Finished difference Result 247 states and 292 transitions. [2019-11-23 22:27:00,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:27:00,753 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2019-11-23 22:27:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:00,754 INFO L225 Difference]: With dead ends: 247 [2019-11-23 22:27:00,754 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 22:27:00,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:27:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 22:27:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2019-11-23 22:27:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 22:27:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 170 transitions. [2019-11-23 22:27:00,763 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 170 transitions. Word has length 143 [2019-11-23 22:27:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:00,763 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 170 transitions. [2019-11-23 22:27:00,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:27:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 170 transitions. [2019-11-23 22:27:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 22:27:00,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:00,765 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:00,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:00,971 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:00,972 INFO L82 PathProgramCache]: Analyzing trace with hash 908468627, now seen corresponding path program 22 times [2019-11-23 22:27:00,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:00,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451954391] [2019-11-23 22:27:00,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-11-23 22:27:01,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451954391] [2019-11-23 22:27:01,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257182932] [2019-11-23 22:27:01,588 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:01,746 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:01,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:01,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:27:01,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-11-23 22:27:01,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:01,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:27:01,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679691602] [2019-11-23 22:27:01,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:27:01,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:01,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:27:01,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:27:01,830 INFO L87 Difference]: Start difference. First operand 148 states and 170 transitions. Second operand 27 states. [2019-11-23 22:27:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:01,952 INFO L93 Difference]: Finished difference Result 250 states and 294 transitions. [2019-11-23 22:27:01,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:27:01,953 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 147 [2019-11-23 22:27:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:01,954 INFO L225 Difference]: With dead ends: 250 [2019-11-23 22:27:01,954 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 22:27:01,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:27:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 22:27:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2019-11-23 22:27:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 22:27:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2019-11-23 22:27:01,961 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 147 [2019-11-23 22:27:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:01,961 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2019-11-23 22:27:01,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:27:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2019-11-23 22:27:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 22:27:01,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:01,962 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:02,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:02,166 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1206810961, now seen corresponding path program 23 times [2019-11-23 22:27:02,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:02,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976252160] [2019-11-23 22:27:02,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-11-23 22:27:02,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976252160] [2019-11-23 22:27:02,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420899804] [2019-11-23 22:27:02,746 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:06,574 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:27:06,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:06,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:27:06,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2019-11-23 22:27:06,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:06,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2019-11-23 22:27:06,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886087343] [2019-11-23 22:27:06,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:27:06,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:27:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:27:06,732 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand 34 states. [2019-11-23 22:27:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:06,994 INFO L93 Difference]: Finished difference Result 273 states and 326 transitions. [2019-11-23 22:27:06,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:27:06,995 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2019-11-23 22:27:06,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:06,996 INFO L225 Difference]: With dead ends: 273 [2019-11-23 22:27:06,996 INFO L226 Difference]: Without dead ends: 174 [2019-11-23 22:27:06,997 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:27:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-23 22:27:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2019-11-23 22:27:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 22:27:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2019-11-23 22:27:07,002 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 149 [2019-11-23 22:27:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:07,003 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2019-11-23 22:27:07,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:27:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2019-11-23 22:27:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 22:27:07,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:07,004 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:07,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:07,213 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:07,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1102592938, now seen corresponding path program 24 times [2019-11-23 22:27:07,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:07,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613149673] [2019-11-23 22:27:07,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2019-11-23 22:27:07,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613149673] [2019-11-23 22:27:07,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210248466] [2019-11-23 22:27:07,737 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:09,789 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:27:09,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:09,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:27:09,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-11-23 22:27:09,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:09,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2019-11-23 22:27:09,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026458698] [2019-11-23 22:27:09,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:27:09,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:09,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:27:09,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=777, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:27:09,951 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand 35 states. [2019-11-23 22:27:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:10,080 INFO L93 Difference]: Finished difference Result 281 states and 332 transitions. [2019-11-23 22:27:10,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:27:10,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2019-11-23 22:27:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:10,081 INFO L225 Difference]: With dead ends: 281 [2019-11-23 22:27:10,081 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 22:27:10,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=413, Invalid=777, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:27:10,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 22:27:10,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2019-11-23 22:27:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-11-23 22:27:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2019-11-23 22:27:10,087 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 163 [2019-11-23 22:27:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:10,087 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2019-11-23 22:27:10,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:27:10,087 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2019-11-23 22:27:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-23 22:27:10,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:10,088 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:10,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:10,291 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:10,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1389905894, now seen corresponding path program 25 times [2019-11-23 22:27:10,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:10,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732954365] [2019-11-23 22:27:10,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:10,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732954365] [2019-11-23 22:27:10,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963765978] [2019-11-23 22:27:10,766 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-23 22:27:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:10,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:27:10,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:10,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:10,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 22:27:10,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670233009] [2019-11-23 22:27:10,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:27:10,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:27:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:27:10,927 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand 30 states. [2019-11-23 22:27:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:11,023 INFO L93 Difference]: Finished difference Result 284 states and 334 transitions. [2019-11-23 22:27:11,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:27:11,024 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 167 [2019-11-23 22:27:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:11,025 INFO L225 Difference]: With dead ends: 284 [2019-11-23 22:27:11,025 INFO L226 Difference]: Without dead ends: 171 [2019-11-23 22:27:11,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:27:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-11-23 22:27:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2019-11-23 22:27:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-23 22:27:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 195 transitions. [2019-11-23 22:27:11,031 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 195 transitions. Word has length 167 [2019-11-23 22:27:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:11,032 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 195 transitions. [2019-11-23 22:27:11,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:27:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 195 transitions. [2019-11-23 22:27:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 22:27:11,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:11,033 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:11,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:11,238 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:11,238 INFO L82 PathProgramCache]: Analyzing trace with hash 93672612, now seen corresponding path program 26 times [2019-11-23 22:27:11,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:11,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836961368] [2019-11-23 22:27:11,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:11,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836961368] [2019-11-23 22:27:11,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192922683] [2019-11-23 22:27:11,855 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 22:27:11,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:11,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:12,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:27:12,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:12,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:12,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:27:12,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999282162] [2019-11-23 22:27:12,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:27:12,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:12,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:27:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:27:12,058 INFO L87 Difference]: Start difference. First operand 170 states and 195 transitions. Second operand 31 states. [2019-11-23 22:27:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:12,196 INFO L93 Difference]: Finished difference Result 286 states and 336 transitions. [2019-11-23 22:27:12,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:27:12,196 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2019-11-23 22:27:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:12,197 INFO L225 Difference]: With dead ends: 286 [2019-11-23 22:27:12,198 INFO L226 Difference]: Without dead ends: 173 [2019-11-23 22:27:12,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:27:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-23 22:27:12,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2019-11-23 22:27:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 22:27:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 197 transitions. [2019-11-23 22:27:12,204 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 197 transitions. Word has length 169 [2019-11-23 22:27:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:12,204 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 197 transitions. [2019-11-23 22:27:12,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:27:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 197 transitions. [2019-11-23 22:27:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 22:27:12,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:12,206 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:12,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:12,412 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:12,413 INFO L82 PathProgramCache]: Analyzing trace with hash -45995550, now seen corresponding path program 27 times [2019-11-23 22:27:12,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:12,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130122364] [2019-11-23 22:27:12,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:12,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130122364] [2019-11-23 22:27:12,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440243567] [2019-11-23 22:27:12,998 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:13,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:27:13,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:13,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:27:13,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:13,310 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 22:27:13,310 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:27:13,317 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:27:13,318 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:27:13,318 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2019-11-23 22:27:13,668 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:27:13,673 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:27:13,674 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2019-11-23 22:27:13,675 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:27:13,686 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:27:13,687 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:27:13,687 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:22 [2019-11-23 22:27:13,952 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:27:13,952 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2019-11-23 22:27:13,953 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:27:13,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:27:13,956 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:27:13,956 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2019-11-23 22:27:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 34 proven. 38 refuted. 0 times theorem prover too weak. 1034 trivial. 0 not checked. [2019-11-23 22:27:14,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:14,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 14] total 43 [2019-11-23 22:27:14,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520338887] [2019-11-23 22:27:14,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:27:14,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:27:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1307, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:27:14,119 INFO L87 Difference]: Start difference. First operand 172 states and 197 transitions. Second operand 43 states. [2019-11-23 22:27:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:16,581 INFO L93 Difference]: Finished difference Result 391 states and 463 transitions. [2019-11-23 22:27:16,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:27:16,582 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 171 [2019-11-23 22:27:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:16,584 INFO L225 Difference]: With dead ends: 391 [2019-11-23 22:27:16,584 INFO L226 Difference]: Without dead ends: 278 [2019-11-23 22:27:16,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1474, Invalid=4688, Unknown=0, NotChecked=0, Total=6162 [2019-11-23 22:27:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-23 22:27:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 209. [2019-11-23 22:27:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-11-23 22:27:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 242 transitions. [2019-11-23 22:27:16,601 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 242 transitions. Word has length 171 [2019-11-23 22:27:16,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:16,602 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 242 transitions. [2019-11-23 22:27:16,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:27:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 242 transitions. [2019-11-23 22:27:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 22:27:16,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:16,604 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:16,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:16,809 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 610991394, now seen corresponding path program 1 times [2019-11-23 22:27:16,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:16,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828922984] [2019-11-23 22:27:16,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:17,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828922984] [2019-11-23 22:27:17,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235344134] [2019-11-23 22:27:17,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:17,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:27:17,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:17,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:17,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 22:27:17,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813175999] [2019-11-23 22:27:17,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:27:17,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:27:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:27:17,477 INFO L87 Difference]: Start difference. First operand 209 states and 242 transitions. Second operand 33 states. [2019-11-23 22:27:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:17,583 INFO L93 Difference]: Finished difference Result 360 states and 426 transitions. [2019-11-23 22:27:17,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:27:17,584 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 173 [2019-11-23 22:27:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:17,585 INFO L225 Difference]: With dead ends: 360 [2019-11-23 22:27:17,585 INFO L226 Difference]: Without dead ends: 212 [2019-11-23 22:27:17,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:27:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-11-23 22:27:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2019-11-23 22:27:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-11-23 22:27:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 244 transitions. [2019-11-23 22:27:17,596 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 244 transitions. Word has length 173 [2019-11-23 22:27:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:17,596 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 244 transitions. [2019-11-23 22:27:17,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:27:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 244 transitions. [2019-11-23 22:27:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 22:27:17,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:17,598 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:17,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:17,801 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:17,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash 588186464, now seen corresponding path program 2 times [2019-11-23 22:27:17,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:17,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022286157] [2019-11-23 22:27:17,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:18,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022286157] [2019-11-23 22:27:18,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404641129] [2019-11-23 22:27:18,263 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:18,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:18,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:18,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:27:18,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:18,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:18,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 22:27:18,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634554845] [2019-11-23 22:27:18,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:27:18,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:18,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:27:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:27:18,455 INFO L87 Difference]: Start difference. First operand 211 states and 244 transitions. Second operand 34 states. [2019-11-23 22:27:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:18,589 INFO L93 Difference]: Finished difference Result 362 states and 428 transitions. [2019-11-23 22:27:18,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:27:18,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 175 [2019-11-23 22:27:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:18,591 INFO L225 Difference]: With dead ends: 362 [2019-11-23 22:27:18,591 INFO L226 Difference]: Without dead ends: 214 [2019-11-23 22:27:18,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:27:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-11-23 22:27:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2019-11-23 22:27:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-23 22:27:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 246 transitions. [2019-11-23 22:27:18,608 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 246 transitions. Word has length 175 [2019-11-23 22:27:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:18,608 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 246 transitions. [2019-11-23 22:27:18,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:27:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 246 transitions. [2019-11-23 22:27:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-23 22:27:18,609 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:18,609 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:18,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:18,814 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:18,814 INFO L82 PathProgramCache]: Analyzing trace with hash 147485214, now seen corresponding path program 3 times [2019-11-23 22:27:18,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:18,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527226041] [2019-11-23 22:27:18,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:19,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527226041] [2019-11-23 22:27:19,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025217336] [2019-11-23 22:27:19,341 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:19,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:27:19,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:19,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:27:19,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1234 trivial. 0 not checked. [2019-11-23 22:27:19,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:19,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 10] total 42 [2019-11-23 22:27:19,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218317168] [2019-11-23 22:27:19,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:27:19,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:27:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=1117, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:27:19,757 INFO L87 Difference]: Start difference. First operand 213 states and 246 transitions. Second operand 42 states. [2019-11-23 22:27:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:19,925 INFO L93 Difference]: Finished difference Result 367 states and 434 transitions. [2019-11-23 22:27:19,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:27:19,925 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 177 [2019-11-23 22:27:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:19,926 INFO L225 Difference]: With dead ends: 367 [2019-11-23 22:27:19,927 INFO L226 Difference]: Without dead ends: 219 [2019-11-23 22:27:19,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1117, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:27:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-11-23 22:27:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2019-11-23 22:27:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-11-23 22:27:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 250 transitions. [2019-11-23 22:27:19,936 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 250 transitions. Word has length 177 [2019-11-23 22:27:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:19,936 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 250 transitions. [2019-11-23 22:27:19,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:27:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 250 transitions. [2019-11-23 22:27:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-23 22:27:19,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:19,938 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:20,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:20,142 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1953796902, now seen corresponding path program 4 times [2019-11-23 22:27:20,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:20,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215426139] [2019-11-23 22:27:20,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-11-23 22:27:20,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215426139] [2019-11-23 22:27:20,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511752979] [2019-11-23 22:27:20,851 INFO L92 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:20,972 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:20,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:20,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:27:20,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-11-23 22:27:21,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:21,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 22:27:21,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003321847] [2019-11-23 22:27:21,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:27:21,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:21,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:27:21,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:27:21,030 INFO L87 Difference]: Start difference. First operand 217 states and 250 transitions. Second operand 36 states. [2019-11-23 22:27:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:21,153 INFO L93 Difference]: Finished difference Result 370 states and 436 transitions. [2019-11-23 22:27:21,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:27:21,155 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 181 [2019-11-23 22:27:21,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:21,156 INFO L225 Difference]: With dead ends: 370 [2019-11-23 22:27:21,156 INFO L226 Difference]: Without dead ends: 220 [2019-11-23 22:27:21,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:27:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-11-23 22:27:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2019-11-23 22:27:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-11-23 22:27:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 252 transitions. [2019-11-23 22:27:21,166 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 252 transitions. Word has length 181 [2019-11-23 22:27:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:21,166 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 252 transitions. [2019-11-23 22:27:21,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:27:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 252 transitions. [2019-11-23 22:27:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:27:21,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:21,167 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:21,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:21,371 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 693916952, now seen corresponding path program 5 times [2019-11-23 22:27:21,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:21,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649812610] [2019-11-23 22:27:21,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-11-23 22:27:22,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649812610] [2019-11-23 22:27:22,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584850796] [2019-11-23 22:27:22,021 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:23,664 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-11-23 22:27:23,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:23,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:27:23,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2019-11-23 22:27:23,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:23,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 10] total 44 [2019-11-23 22:27:23,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550932060] [2019-11-23 22:27:23,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:27:23,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:27:23,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=1218, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:27:23,885 INFO L87 Difference]: Start difference. First operand 219 states and 252 transitions. Second operand 44 states. [2019-11-23 22:27:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:24,363 INFO L93 Difference]: Finished difference Result 400 states and 478 transitions. [2019-11-23 22:27:24,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:27:24,364 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 183 [2019-11-23 22:27:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:24,365 INFO L225 Difference]: With dead ends: 400 [2019-11-23 22:27:24,366 INFO L226 Difference]: Without dead ends: 250 [2019-11-23 22:27:24,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=1218, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:27:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-11-23 22:27:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 237. [2019-11-23 22:27:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-11-23 22:27:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 274 transitions. [2019-11-23 22:27:24,375 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 274 transitions. Word has length 183 [2019-11-23 22:27:24,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:24,375 INFO L462 AbstractCegarLoop]: Abstraction has 237 states and 274 transitions. [2019-11-23 22:27:24,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:27:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 274 transitions. [2019-11-23 22:27:24,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-23 22:27:24,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:24,377 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:24,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:24,584 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:24,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1148572273, now seen corresponding path program 6 times [2019-11-23 22:27:24,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:24,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911330094] [2019-11-23 22:27:24,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-11-23 22:27:25,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911330094] [2019-11-23 22:27:25,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402443995] [2019-11-23 22:27:25,205 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:27,618 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:27:27,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:27,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:27:27,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1460 trivial. 0 not checked. [2019-11-23 22:27:27,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:27,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11] total 46 [2019-11-23 22:27:27,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596929596] [2019-11-23 22:27:27,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 22:27:27,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 22:27:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=1350, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:27:27,843 INFO L87 Difference]: Start difference. First operand 237 states and 274 transitions. Second operand 46 states. [2019-11-23 22:27:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:28,354 INFO L93 Difference]: Finished difference Result 434 states and 520 transitions. [2019-11-23 22:27:28,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 22:27:28,355 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 197 [2019-11-23 22:27:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:28,357 INFO L225 Difference]: With dead ends: 434 [2019-11-23 22:27:28,357 INFO L226 Difference]: Without dead ends: 268 [2019-11-23 22:27:28,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1350, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:27:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-11-23 22:27:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 255. [2019-11-23 22:27:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-11-23 22:27:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 296 transitions. [2019-11-23 22:27:28,370 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 296 transitions. Word has length 197 [2019-11-23 22:27:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:28,370 INFO L462 AbstractCegarLoop]: Abstraction has 255 states and 296 transitions. [2019-11-23 22:27:28,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 22:27:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 296 transitions. [2019-11-23 22:27:28,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-23 22:27:28,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:28,372 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:28,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:28,580 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:28,581 INFO L82 PathProgramCache]: Analyzing trace with hash -658952758, now seen corresponding path program 7 times [2019-11-23 22:27:28,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:28,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937586554] [2019-11-23 22:27:28,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:29,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937586554] [2019-11-23 22:27:29,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361422227] [2019-11-23 22:27:29,335 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:29,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:27:29,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:29,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:29,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 22:27:29,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724884765] [2019-11-23 22:27:29,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:27:29,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:27:29,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:27:29,512 INFO L87 Difference]: Start difference. First operand 255 states and 296 transitions. Second operand 39 states. [2019-11-23 22:27:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:29,662 INFO L93 Difference]: Finished difference Result 440 states and 522 transitions. [2019-11-23 22:27:29,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:27:29,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 211 [2019-11-23 22:27:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:29,664 INFO L225 Difference]: With dead ends: 440 [2019-11-23 22:27:29,664 INFO L226 Difference]: Without dead ends: 258 [2019-11-23 22:27:29,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:27:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-11-23 22:27:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2019-11-23 22:27:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2019-11-23 22:27:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 298 transitions. [2019-11-23 22:27:29,673 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 298 transitions. Word has length 211 [2019-11-23 22:27:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:29,674 INFO L462 AbstractCegarLoop]: Abstraction has 257 states and 298 transitions. [2019-11-23 22:27:29,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:27:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 298 transitions. [2019-11-23 22:27:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-23 22:27:29,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:29,675 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:29,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,879 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:29,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:29,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1885640072, now seen corresponding path program 8 times [2019-11-23 22:27:29,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:29,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340109579] [2019-11-23 22:27:29,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:30,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340109579] [2019-11-23 22:27:30,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891984927] [2019-11-23 22:27:30,817 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:30,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:30,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:30,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:27:30,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:31,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:31,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 22:27:31,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731450699] [2019-11-23 22:27:31,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:27:31,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:27:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:27:31,025 INFO L87 Difference]: Start difference. First operand 257 states and 298 transitions. Second operand 40 states. [2019-11-23 22:27:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:31,153 INFO L93 Difference]: Finished difference Result 442 states and 524 transitions. [2019-11-23 22:27:31,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:27:31,153 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 213 [2019-11-23 22:27:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:31,155 INFO L225 Difference]: With dead ends: 442 [2019-11-23 22:27:31,155 INFO L226 Difference]: Without dead ends: 260 [2019-11-23 22:27:31,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:27:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-11-23 22:27:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2019-11-23 22:27:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-11-23 22:27:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 300 transitions. [2019-11-23 22:27:31,163 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 300 transitions. Word has length 213 [2019-11-23 22:27:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:31,163 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 300 transitions. [2019-11-23 22:27:31,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:27:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 300 transitions. [2019-11-23 22:27:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-23 22:27:31,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:31,165 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:31,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:31,369 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash -892009018, now seen corresponding path program 9 times [2019-11-23 22:27:31,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:31,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105828404] [2019-11-23 22:27:31,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:32,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105828404] [2019-11-23 22:27:32,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793613955] [2019-11-23 22:27:32,017 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:32,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:27:32,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:32,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:27:32,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2019-11-23 22:27:32,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:32,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 11] total 49 [2019-11-23 22:27:32,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886602792] [2019-11-23 22:27:32,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:27:32,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:32,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:27:32,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:27:32,682 INFO L87 Difference]: Start difference. First operand 259 states and 300 transitions. Second operand 49 states. [2019-11-23 22:27:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:32,855 INFO L93 Difference]: Finished difference Result 447 states and 530 transitions. [2019-11-23 22:27:32,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 22:27:32,856 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 215 [2019-11-23 22:27:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:32,860 INFO L225 Difference]: With dead ends: 447 [2019-11-23 22:27:32,860 INFO L226 Difference]: Without dead ends: 265 [2019-11-23 22:27:32,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:27:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-11-23 22:27:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2019-11-23 22:27:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2019-11-23 22:27:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 304 transitions. [2019-11-23 22:27:32,869 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 304 transitions. Word has length 215 [2019-11-23 22:27:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:32,869 INFO L462 AbstractCegarLoop]: Abstraction has 263 states and 304 transitions. [2019-11-23 22:27:32,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:27:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 304 transitions. [2019-11-23 22:27:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-23 22:27:32,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:32,871 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:33,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:33,075 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash 935960450, now seen corresponding path program 10 times [2019-11-23 22:27:33,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:33,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556152876] [2019-11-23 22:27:33,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 22:27:34,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556152876] [2019-11-23 22:27:34,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043510091] [2019-11-23 22:27:34,101 INFO L92 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:34,233 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:34,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:34,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:27:34,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 22:27:34,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:34,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 22:27:34,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142928228] [2019-11-23 22:27:34,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:27:34,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:27:34,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:27:34,299 INFO L87 Difference]: Start difference. First operand 263 states and 304 transitions. Second operand 42 states. [2019-11-23 22:27:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:34,437 INFO L93 Difference]: Finished difference Result 450 states and 532 transitions. [2019-11-23 22:27:34,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:27:34,438 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 219 [2019-11-23 22:27:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:34,439 INFO L225 Difference]: With dead ends: 450 [2019-11-23 22:27:34,440 INFO L226 Difference]: Without dead ends: 266 [2019-11-23 22:27:34,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:27:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-11-23 22:27:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2019-11-23 22:27:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2019-11-23 22:27:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 306 transitions. [2019-11-23 22:27:34,448 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 306 transitions. Word has length 219 [2019-11-23 22:27:34,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:34,449 INFO L462 AbstractCegarLoop]: Abstraction has 265 states and 306 transitions. [2019-11-23 22:27:34,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:27:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 306 transitions. [2019-11-23 22:27:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-11-23 22:27:34,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:34,450 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:34,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:34,655 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2014811840, now seen corresponding path program 11 times [2019-11-23 22:27:34,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:34,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440540425] [2019-11-23 22:27:34,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 22:27:35,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440540425] [2019-11-23 22:27:35,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978693176] [2019-11-23 22:27:35,744 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true