/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/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:06:55,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:06:55,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:06:55,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:06:55,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:06:55,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:06:55,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:06:55,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:06:55,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:06:55,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:06:55,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:06:55,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:06:55,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:06:55,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:06:55,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:06:55,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:06:55,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:06:55,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:06:55,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:06:55,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:06:55,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:06:55,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:06:55,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:06:55,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:06:55,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:06:55,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:06:55,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:06:55,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:06:55,483 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 22:06:55,498 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:06:55,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:06:55,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:06:55,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:06:55,500 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:06:55,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:06:55,500 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:06:55,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:06:55,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:06:55,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:06:55,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:06:55,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:06:55,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:06:55,502 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:06:55,502 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:06:55,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:06:55,502 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:06:55,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:06:55,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:06:55,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:06:55,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:06:55,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:06:55,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:06:55,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:06:55,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:06:55,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:06:55,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:06:55,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:06:55,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:06:55,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:06:55,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:06:55,827 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:06:55,831 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:06:55,833 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:06:55,833 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:06:55,834 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2019-11-23 22:06:55,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4c58bc2/b09412d5dce64b6ba1524a20337ecdce/FLAG73c890aa9 [2019-11-23 22:06:56,342 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:06:56,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2019-11-23 22:06:56,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4c58bc2/b09412d5dce64b6ba1524a20337ecdce/FLAG73c890aa9 [2019-11-23 22:06:56,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4c58bc2/b09412d5dce64b6ba1524a20337ecdce [2019-11-23 22:06:56,761 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:06:56,763 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:06:56,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:06:56,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:06:56,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:06:56,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:06:56" (1/1) ... [2019-11-23 22:06:56,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bea9702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:56, skipping insertion in model container [2019-11-23 22:06:56,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:06:56" (1/1) ... [2019-11-23 22:06:56,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:06:56,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:06:56,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:06:56,975 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:06:56,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:06:57,010 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:06:57,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57 WrapperNode [2019-11-23 22:06:57,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:06:57,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:06:57,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:06:57,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:06:57,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:06:57,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:06:57,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:06:57,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:06:57,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (1/1) ... [2019-11-23 22:06:57,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:06:57,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:06:57,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:06:57,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:06:57,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (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 22:06:57,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:06:57,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:06:57,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:06:57,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:06:57,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:06:57,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:06:57,414 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:06:57,415 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:06:57,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:06:57 BoogieIcfgContainer [2019-11-23 22:06:57,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:06:57,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:06:57,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:06:57,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:06:57,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:06:56" (1/3) ... [2019-11-23 22:06:57,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ed3b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:06:57, skipping insertion in model container [2019-11-23 22:06:57,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:06:57" (2/3) ... [2019-11-23 22:06:57,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ed3b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:06:57, skipping insertion in model container [2019-11-23 22:06:57,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:06:57" (3/3) ... [2019-11-23 22:06:57,444 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2019-11-23 22:06:57,462 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:06:57,471 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:06:57,484 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:06:57,511 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:06:57,511 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:06:57,511 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:06:57,511 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:06:57,511 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:06:57,512 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:06:57,512 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:06:57,512 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:06:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 22:06:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:06:57,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:06:57,538 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:06:57,538 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:06:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:06:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2019-11-23 22:06:57,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:06:57,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078389045] [2019-11-23 22:06:57,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:06:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:06:57,696 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 22:06:57,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078389045] [2019-11-23 22:06:57,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:06:57,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:06:57,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125718839] [2019-11-23 22:06:57,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:06:57,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:06:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:06:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:06:57,715 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-23 22:06:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:06:57,741 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2019-11-23 22:06:57,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:06:57,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 22:06:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:06:57,754 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:06:57,755 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:06:57,758 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 22:06:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:06:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-23 22:06:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:06:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:06:57,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-23 22:06:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:06:57,789 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:06:57,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:06:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:06:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:06:57,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:06:57,790 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:06:57,791 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:06:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:06:57,791 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2019-11-23 22:06:57,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:06:57,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256374723] [2019-11-23 22:06:57,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:06:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:06:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:57,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256374723] [2019-11-23 22:06:57,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344227565] [2019-11-23 22:06:57,846 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 22:06:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:06:57,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:06:57,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:06:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:57,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:06:57,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:06:57,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866879956] [2019-11-23 22:06:57,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:06:57,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:06:57,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:06:57,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:06:57,937 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2019-11-23 22:06:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:06:57,958 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-23 22:06:57,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:06:57,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-23 22:06:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:06:57,960 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:06:57,960 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:06:57,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 22:06:57,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:06:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-23 22:06:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:06:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:06:57,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-11-23 22:06:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:06:57,966 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:06:57,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:06:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:06:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:06:57,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:06:57,967 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:06:58,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:06:58,171 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:06:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:06:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2019-11-23 22:06:58,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:06:58,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380633880] [2019-11-23 22:06:58,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:06:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:06:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:58,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380633880] [2019-11-23 22:06:58,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332033885] [2019-11-23 22:06:58,264 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 22:06:58,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:06:58,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:06:58,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:06:58,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:06:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:58,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:06:58,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:06:58,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371523357] [2019-11-23 22:06:58,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:06:58,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:06:58,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:06:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:06:58,333 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2019-11-23 22:06:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:06:58,364 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-23 22:06:58,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:06:58,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-23 22:06:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:06:58,366 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:06:58,366 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:06:58,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 22:06:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:06:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-23 22:06:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:06:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-23 22:06:58,370 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-11-23 22:06:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:06:58,371 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-23 22:06:58,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:06:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-23 22:06:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:06:58,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:06:58,372 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2019-11-23 22:06:58,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:06:58,575 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:06:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:06:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2019-11-23 22:06:58,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:06:58,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424743903] [2019-11-23 22:06:58,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:06:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:06:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:58,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424743903] [2019-11-23 22:06:58,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372157138] [2019-11-23 22:06:58,663 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 22:06:58,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:06:58,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:06:58,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:06:58,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:06:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:58,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:06:58,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:06:58,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786998497] [2019-11-23 22:06:58,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:06:58,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:06:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:06:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:06:58,737 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2019-11-23 22:06:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:06:58,777 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-23 22:06:58,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:06:58,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-23 22:06:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:06:58,779 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:06:58,780 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:06:58,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:06:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:06:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 22:06:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:06:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-23 22:06:58,789 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-11-23 22:06:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:06:58,790 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-23 22:06:58,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:06:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-23 22:06:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:06:58,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:06:58,791 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2019-11-23 22:06:58,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:06:58,992 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:06:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:06:58,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2019-11-23 22:06:58,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:06:58,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749049907] [2019-11-23 22:06:58,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:06:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:06:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:59,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749049907] [2019-11-23 22:06:59,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460187497] [2019-11-23 22:06:59,076 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 22:06:59,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:06:59,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:06:59,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:06:59,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:06:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:59,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:06:59,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:06:59,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888604227] [2019-11-23 22:06:59,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:06:59,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:06:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:06:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:06:59,135 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-11-23 22:06:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:06:59,198 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-23 22:06:59,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:06:59,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-23 22:06:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:06:59,199 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:06:59,199 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:06:59,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 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 22:06:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:06:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:06:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:06:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:06:59,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-11-23 22:06:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:06:59,205 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:06:59,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:06:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:06:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:06:59,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:06:59,206 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2019-11-23 22:06:59,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:06:59,410 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:06:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:06:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2019-11-23 22:06:59,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:06:59,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882772702] [2019-11-23 22:06:59,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:06:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:06:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:59,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882772702] [2019-11-23 22:06:59,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310291398] [2019-11-23 22:06:59,506 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 22:06:59,551 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:06:59,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:06:59,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:06:59,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:06:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:59,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:06:59,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 22:06:59,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50701088] [2019-11-23 22:06:59,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:06:59,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:06:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:06:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:06:59,576 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-11-23 22:06:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:06:59,631 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-23 22:06:59,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:06:59,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-23 22:06:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:06:59,632 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:06:59,632 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:06:59,633 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:06:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:06:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 22:06:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:06:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:06:59,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-11-23 22:06:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:06:59,641 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:06:59,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:06:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:06:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:06:59,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:06:59,643 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2019-11-23 22:06:59,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:06:59,844 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:06:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:06:59,845 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2019-11-23 22:06:59,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:06:59,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200840686] [2019-11-23 22:06:59,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:06:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:06:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:06:59,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200840686] [2019-11-23 22:06:59,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665333621] [2019-11-23 22:06:59,960 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 22:07:00,011 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:07:00,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:00,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:07:00,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:00,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:00,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 22:07:00,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991742393] [2019-11-23 22:07:00,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:07:00,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:07:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:00,029 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2019-11-23 22:07:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:00,072 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-23 22:07:00,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:07:00,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-23 22:07:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:00,074 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:07:00,074 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:07:00,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:07:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 22:07:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:07:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-23 22:07:00,079 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2019-11-23 22:07:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:00,079 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-23 22:07:00,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:07:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-23 22:07:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:07:00,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:00,080 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:00,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:00,285 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2019-11-23 22:07:00,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:00,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584490698] [2019-11-23 22:07:00,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:00,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584490698] [2019-11-23 22:07:00,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47467656] [2019-11-23 22:07:00,381 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 22:07:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:00,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:07:00,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:00,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:00,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:07:00,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227140788] [2019-11-23 22:07:00,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:07:00,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:07:00,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:00,441 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2019-11-23 22:07:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:00,491 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:07:00,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:07:00,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-11-23 22:07:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:00,493 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:07:00,493 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:07:00,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 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 22:07:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:07:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-23 22:07:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:07:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:07:00,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2019-11-23 22:07:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:00,499 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:07:00,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:07:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:07:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:07:00,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:00,500 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:00,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:00,701 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2019-11-23 22:07:00,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:00,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000117515] [2019-11-23 22:07:00,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:00,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000117515] [2019-11-23 22:07:00,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068569499] [2019-11-23 22:07:00,793 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 22:07:00,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:00,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:00,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:07:00,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:00,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:00,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:07:00,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731607561] [2019-11-23 22:07:00,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:07:00,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:07:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:00,857 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2019-11-23 22:07:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:00,899 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-23 22:07:00,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:07:00,899 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-23 22:07:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:00,900 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:07:00,900 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:07:00,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 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 22:07:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:07:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-23 22:07:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:07:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-23 22:07:00,905 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2019-11-23 22:07:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:00,906 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-23 22:07:00,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:07:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-23 22:07:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:07:00,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:00,907 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:01,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:01,111 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:01,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2019-11-23 22:07:01,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:01,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636562387] [2019-11-23 22:07:01,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:01,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636562387] [2019-11-23 22:07:01,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885773309] [2019-11-23 22:07:01,248 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 22:07:01,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:07:01,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:01,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:07:01,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:01,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:01,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 22:07:01,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544951896] [2019-11-23 22:07:01,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:07:01,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:07:01,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:01,331 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2019-11-23 22:07:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:01,371 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-23 22:07:01,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:07:01,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2019-11-23 22:07:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:01,373 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:07:01,373 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:07:01,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:07:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:07:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:07:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-23 22:07:01,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2019-11-23 22:07:01,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:01,378 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-23 22:07:01,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:07:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-23 22:07:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:07:01,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:01,379 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:01,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:01,583 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2019-11-23 22:07:01,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:01,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019141195] [2019-11-23 22:07:01,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:01,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019141195] [2019-11-23 22:07:01,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692626133] [2019-11-23 22:07:01,697 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 22:07:01,739 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:01,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:01,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:07:01,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:01,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:01,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:07:01,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266852872] [2019-11-23 22:07:01,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:07:01,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:07:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:01,763 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2019-11-23 22:07:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:01,821 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-23 22:07:01,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:07:01,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2019-11-23 22:07:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:01,826 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:07:01,827 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:07:01,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:07:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 22:07:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:07:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:07:01,834 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2019-11-23 22:07:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:01,835 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:07:01,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:07:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:07:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:07:01,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:01,836 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:02,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:02,043 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:02,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:02,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2019-11-23 22:07:02,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:02,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791985029] [2019-11-23 22:07:02,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:02,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791985029] [2019-11-23 22:07:02,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524006494] [2019-11-23 22:07:02,214 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 22:07:02,295 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:07:02,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:02,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:07:02,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:02,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:02,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 22:07:02,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888670229] [2019-11-23 22:07:02,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:07:02,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:02,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:07:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:02,316 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2019-11-23 22:07:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:02,369 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-11-23 22:07:02,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:07:02,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-11-23 22:07:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:02,371 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:07:02,371 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:07:02,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:07:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 22:07:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:07:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-23 22:07:02,375 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2019-11-23 22:07:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:02,376 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-23 22:07:02,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:07:02,376 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-23 22:07:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:07:02,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:02,377 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:02,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:02,581 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:02,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:02,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2019-11-23 22:07:02,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:02,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218211269] [2019-11-23 22:07:02,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:02,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218211269] [2019-11-23 22:07:02,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174191849] [2019-11-23 22:07:02,718 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 22:07:02,835 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:07:02,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:02,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:07:02,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:02,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:02,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 22:07:02,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148451394] [2019-11-23 22:07:02,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:07:02,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:07:02,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:02,877 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2019-11-23 22:07:02,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:02,939 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-11-23 22:07:02,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:07:02,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2019-11-23 22:07:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:02,948 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:07:02,948 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:07:02,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:07:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 22:07:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:07:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-23 22:07:02,956 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2019-11-23 22:07:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:02,956 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-23 22:07:02,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:07:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-23 22:07:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:07:02,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:02,958 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:03,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:03,159 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2019-11-23 22:07:03,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:03,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982758783] [2019-11-23 22:07:03,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:03,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982758783] [2019-11-23 22:07:03,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539834567] [2019-11-23 22:07:03,300 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 22:07:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:03,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:07:03,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:03,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:03,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:07:03,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267441963] [2019-11-23 22:07:03,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:07:03,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:03,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:07:03,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:03,376 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2019-11-23 22:07:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:03,445 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:07:03,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:07:03,448 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2019-11-23 22:07:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:03,448 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:07:03,448 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:07:03,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 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 22:07:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:07:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-23 22:07:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:07:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-23 22:07:03,453 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2019-11-23 22:07:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:03,453 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-23 22:07:03,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:07:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-23 22:07:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:07:03,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:03,454 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:03,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:03,656 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2019-11-23 22:07:03,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:03,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272979983] [2019-11-23 22:07:03,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:03,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272979983] [2019-11-23 22:07:03,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254903723] [2019-11-23 22:07:03,841 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 22:07:03,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:03,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:03,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:07:03,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:03,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:03,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:07:03,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803171151] [2019-11-23 22:07:03,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:07:03,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:03,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:07:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:03,894 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2019-11-23 22:07:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:03,954 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-23 22:07:03,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:07:03,954 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2019-11-23 22:07:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:03,956 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:07:03,956 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:07:03,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 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 22:07:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:07:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 22:07:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:07:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-23 22:07:03,963 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2019-11-23 22:07:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:03,964 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-23 22:07:03,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:07:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-23 22:07:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:07:03,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:03,965 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:04,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,168 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2019-11-23 22:07:04,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:04,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558532479] [2019-11-23 22:07:04,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558532479] [2019-11-23 22:07:04,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608517302] [2019-11-23 22:07:04,366 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 22:07:04,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 22:07:04,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:04,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:07:04,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:04,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 22:07:04,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532431697] [2019-11-23 22:07:04,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:07:04,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:07:04,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:04,653 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2019-11-23 22:07:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:04,709 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-11-23 22:07:04,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:07:04,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2019-11-23 22:07:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:04,710 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:07:04,710 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:07:04,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:07:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 22:07:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:07:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-23 22:07:04,715 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2019-11-23 22:07:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:04,716 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-23 22:07:04,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:07:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-23 22:07:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:07:04,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:04,717 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:04,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,921 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2019-11-23 22:07:04,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:04,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262339456] [2019-11-23 22:07:04,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262339456] [2019-11-23 22:07:05,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439104279] [2019-11-23 22:07:05,130 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 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 22:07:05,188 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:05,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:05,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:07:05,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:05,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:07:05,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167251368] [2019-11-23 22:07:05,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:07:05,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:05,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:07:05,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:05,215 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2019-11-23 22:07:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:05,300 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-11-23 22:07:05,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:07:05,301 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2019-11-23 22:07:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:05,302 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:07:05,302 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:07:05,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 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 22:07:05,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:07:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-23 22:07:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:07:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-23 22:07:05,312 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2019-11-23 22:07:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:05,313 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-23 22:07:05,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:07:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-23 22:07:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:07:05,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:05,316 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:05,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,517 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2019-11-23 22:07:05,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:05,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239807949] [2019-11-23 22:07:05,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239807949] [2019-11-23 22:07:05,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868016372] [2019-11-23 22:07:05,725 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 22:07:05,871 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:07:05,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:05,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:07:05,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:05,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:07:05,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597742493] [2019-11-23 22:07:05,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:07:05,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:05,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:07:05,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:05,907 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2019-11-23 22:07:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:05,991 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-11-23 22:07:05,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:07:05,991 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2019-11-23 22:07:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:05,992 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:07:05,992 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 22:07:05,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 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 22:07:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 22:07:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-11-23 22:07:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:07:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-11-23 22:07:05,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2019-11-23 22:07:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:05,999 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-11-23 22:07:05,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:07:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-11-23 22:07:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:07:06,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:06,000 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:06,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,211 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:06,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2019-11-23 22:07:06,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:06,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794086649] [2019-11-23 22:07:06,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794086649] [2019-11-23 22:07:06,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658960579] [2019-11-23 22:07:06,444 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 22:07:06,869 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:07:06,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:06,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:07:06,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:06,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 22:07:06,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804087360] [2019-11-23 22:07:06,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:07:06,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:07:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:06,892 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2019-11-23 22:07:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:06,974 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-11-23 22:07:06,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:07:06,974 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2019-11-23 22:07:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:06,975 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:07:06,975 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:07:06,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:07:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-11-23 22:07:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:07:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-11-23 22:07:06,980 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2019-11-23 22:07:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:06,981 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-11-23 22:07:06,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:07:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-11-23 22:07:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:07:06,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:06,982 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:07,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,182 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2019-11-23 22:07:07,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:07,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764812985] [2019-11-23 22:07:07,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764812985] [2019-11-23 22:07:07,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214592948] [2019-11-23 22:07:07,445 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 22:07:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:07,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:07:07,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:07,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:07:07,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126139679] [2019-11-23 22:07:07,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:07:07,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:07:07,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:07,501 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2019-11-23 22:07:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:07,579 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-11-23 22:07:07,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:07:07,580 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2019-11-23 22:07:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:07,580 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:07:07,580 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:07:07,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:07:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-23 22:07:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:07:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-23 22:07:07,586 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2019-11-23 22:07:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:07,586 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-23 22:07:07,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:07:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-23 22:07:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:07:07,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:07,587 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:07,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,796 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:07,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2019-11-23 22:07:07,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:07,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738385692] [2019-11-23 22:07:07,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738385692] [2019-11-23 22:07:08,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599036523] [2019-11-23 22:07:08,065 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 22:07:08,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:08,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:08,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:07:08,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:08,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:07:08,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776146217] [2019-11-23 22:07:08,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:07:08,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:07:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:08,152 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2019-11-23 22:07:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,241 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-23 22:07:08,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:07:08,242 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2019-11-23 22:07:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,243 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:07:08,243 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:07:08,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 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 22:07:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:07:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 22:07:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:07:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-23 22:07:08,251 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2019-11-23 22:07:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,252 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-23 22:07:08,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:07:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-23 22:07:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 22:07:08,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,253 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,453 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2019-11-23 22:07:08,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995922499] [2019-11-23 22:07:08,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995922499] [2019-11-23 22:07:08,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972465399] [2019-11-23 22:07:08,711 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 22:07:09,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 22:07:09,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:09,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:07:09,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:09,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 22:07:09,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627599269] [2019-11-23 22:07:09,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:07:09,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:09,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:07:09,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:09,204 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2019-11-23 22:07:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:09,289 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-11-23 22:07:09,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:07:09,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2019-11-23 22:07:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:09,291 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:07:09,291 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:07:09,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 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 22:07:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:07:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-23 22:07:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:07:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-11-23 22:07:09,298 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2019-11-23 22:07:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:09,298 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-11-23 22:07:09,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:07:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-11-23 22:07:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:07:09,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:09,299 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:09,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,500 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2019-11-23 22:07:09,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:09,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398231965] [2019-11-23 22:07:09,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398231965] [2019-11-23 22:07:09,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664808781] [2019-11-23 22:07:09,839 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 22:07:09,877 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:09,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:09,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:07:09,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:09,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 22:07:09,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649835866] [2019-11-23 22:07:09,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:07:09,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:07:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:09,901 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2019-11-23 22:07:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:09,992 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-11-23 22:07:09,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:07:09,993 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2019-11-23 22:07:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:09,993 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:07:09,993 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:07:09,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:07:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-23 22:07:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:07:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-11-23 22:07:09,998 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2019-11-23 22:07:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:09,998 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-11-23 22:07:09,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:07:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-11-23 22:07:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:07:09,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:09,999 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,200 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2019-11-23 22:07:10,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998890137] [2019-11-23 22:07:10,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:10,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998890137] [2019-11-23 22:07:10,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333167742] [2019-11-23 22:07:10,486 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 22:07:10,772 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 22:07:10,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:10,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:07:10,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:10,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:10,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:07:10,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113244243] [2019-11-23 22:07:10,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:07:10,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:07:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:10,791 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2019-11-23 22:07:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,897 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-11-23 22:07:10,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:07:10,897 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2019-11-23 22:07:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,898 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:07:10,898 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:07:10,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:07:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 22:07:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:07:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-11-23 22:07:10,902 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2019-11-23 22:07:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,903 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-11-23 22:07:10,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:07:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-11-23 22:07:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:07:10,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,903 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:11,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,108 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2019-11-23 22:07:11,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:11,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022088492] [2019-11-23 22:07:11,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:11,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022088492] [2019-11-23 22:07:11,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324132390] [2019-11-23 22:07:11,425 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 22:07:13,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:07:13,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:13,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:07:13,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:13,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:13,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:07:13,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801209711] [2019-11-23 22:07:13,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:07:13,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:13,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:07:13,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:13,665 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2019-11-23 22:07:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,768 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-11-23 22:07:13,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:07:13,769 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2019-11-23 22:07:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,769 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:07:13,770 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 22:07:13,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 22:07:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 22:07:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:07:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-23 22:07:13,774 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2019-11-23 22:07:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,774 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-23 22:07:13,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:07:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-23 22:07:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:07:13,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,775 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:13,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,980 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:13,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2019-11-23 22:07:13,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:13,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468826049] [2019-11-23 22:07:13,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:14,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468826049] [2019-11-23 22:07:14,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192771128] [2019-11-23 22:07:14,306 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 22:07:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:14,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:07:14,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:14,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:14,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 22:07:14,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012215525] [2019-11-23 22:07:14,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:07:14,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:14,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:07:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:14,365 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2019-11-23 22:07:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:14,472 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-11-23 22:07:14,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:07:14,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2019-11-23 22:07:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:14,473 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:07:14,473 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 22:07:14,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 22:07:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 22:07:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:07:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-11-23 22:07:14,477 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2019-11-23 22:07:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:14,478 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-11-23 22:07:14,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:07:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-11-23 22:07:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:07:14,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:14,479 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:14,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,679 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2019-11-23 22:07:14,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:14,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546654711] [2019-11-23 22:07:14,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:15,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546654711] [2019-11-23 22:07:15,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923488113] [2019-11-23 22:07:15,131 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 22:07:15,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:15,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:15,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:07:15,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:15,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:15,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 22:07:15,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373088540] [2019-11-23 22:07:15,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:07:15,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:15,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:07:15,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:15,215 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2019-11-23 22:07:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:15,306 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-11-23 22:07:15,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:07:15,307 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2019-11-23 22:07:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:15,308 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:07:15,308 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:07:15,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:07:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-23 22:07:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:07:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-11-23 22:07:15,317 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2019-11-23 22:07:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:15,318 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-11-23 22:07:15,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:07:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-11-23 22:07:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:07:15,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:15,319 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:15,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,523 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:15,523 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2019-11-23 22:07:15,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:15,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311164902] [2019-11-23 22:07:15,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:16,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311164902] [2019-11-23 22:07:16,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574667640] [2019-11-23 22:07:16,014 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 22:07:16,905 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 22:07:16,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:16,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:07:16,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:16,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:16,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:07:16,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709856760] [2019-11-23 22:07:16,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:07:16,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:16,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:07:16,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:16,924 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2019-11-23 22:07:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:17,038 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-11-23 22:07:17,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:07:17,038 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2019-11-23 22:07:17,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:17,039 INFO L225 Difference]: With dead ends: 68 [2019-11-23 22:07:17,039 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:07:17,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 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 22:07:17,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:07:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-23 22:07:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 22:07:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-11-23 22:07:17,043 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2019-11-23 22:07:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:17,043 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-11-23 22:07:17,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:07:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-11-23 22:07:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 22:07:17,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:17,044 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:17,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,249 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:17,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:17,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2019-11-23 22:07:17,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:17,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884224400] [2019-11-23 22:07:17,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:17,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884224400] [2019-11-23 22:07:17,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698004043] [2019-11-23 22:07:17,676 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 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 22:07:17,719 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:17,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:17,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:07:17,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:17,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:17,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 22:07:17,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780092493] [2019-11-23 22:07:17,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:07:17,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:17,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:07:17,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:17,751 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2019-11-23 22:07:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:17,846 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-11-23 22:07:17,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:07:17,846 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2019-11-23 22:07:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:17,847 INFO L225 Difference]: With dead ends: 70 [2019-11-23 22:07:17,847 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 22:07:17,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 22:07:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-11-23 22:07:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:07:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-11-23 22:07:17,852 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2019-11-23 22:07:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:17,852 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-11-23 22:07:17,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:07:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-11-23 22:07:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:07:17,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:17,853 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:18,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:18,057 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2019-11-23 22:07:18,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:18,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023546495] [2019-11-23 22:07:18,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:18,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023546495] [2019-11-23 22:07:18,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910604174] [2019-11-23 22:07:18,566 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 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 22:07:18,997 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 22:07:18,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:19,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:07:19,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:19,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:19,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 22:07:19,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629578434] [2019-11-23 22:07:19,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:07:19,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:19,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:07:19,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:19,020 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2019-11-23 22:07:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:19,145 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-11-23 22:07:19,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:07:19,146 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2019-11-23 22:07:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:19,147 INFO L225 Difference]: With dead ends: 72 [2019-11-23 22:07:19,147 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 22:07:19,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 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 22:07:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 22:07:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-11-23 22:07:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 22:07:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-11-23 22:07:19,150 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2019-11-23 22:07:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:19,151 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-11-23 22:07:19,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:07:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-11-23 22:07:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 22:07:19,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:19,152 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:19,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:19,357 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2019-11-23 22:07:19,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:19,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194692582] [2019-11-23 22:07:19,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:19,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194692582] [2019-11-23 22:07:19,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855441086] [2019-11-23 22:07:19,757 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 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 22:07:23,248 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 22:07:23,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:23,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:07:23,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:23,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:23,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 22:07:23,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764425313] [2019-11-23 22:07:23,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:07:23,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:07:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:23,273 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2019-11-23 22:07:23,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:23,361 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-11-23 22:07:23,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:07:23,361 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2019-11-23 22:07:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:23,362 INFO L225 Difference]: With dead ends: 74 [2019-11-23 22:07:23,362 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 22:07:23,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 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 22:07:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 22:07:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-11-23 22:07:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 22:07:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-11-23 22:07:23,366 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2019-11-23 22:07:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:23,366 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-11-23 22:07:23,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:07:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-11-23 22:07:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 22:07:23,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:23,367 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:23,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:23,574 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2019-11-23 22:07:23,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:23,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406025508] [2019-11-23 22:07:23,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:24,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406025508] [2019-11-23 22:07:24,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256018867] [2019-11-23 22:07:24,026 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 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 22:07:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:24,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:07:24,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:24,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:24,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 22:07:24,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589585002] [2019-11-23 22:07:24,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:07:24,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:24,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:07:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:24,108 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2019-11-23 22:07:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:24,208 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-11-23 22:07:24,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:07:24,209 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2019-11-23 22:07:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:24,210 INFO L225 Difference]: With dead ends: 76 [2019-11-23 22:07:24,210 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:07:24,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:07:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-23 22:07:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:07:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-11-23 22:07:24,214 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2019-11-23 22:07:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:24,215 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-11-23 22:07:24,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:07:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-11-23 22:07:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:07:24,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:24,216 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:24,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:24,418 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2019-11-23 22:07:24,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:24,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416342470] [2019-11-23 22:07:24,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:24,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416342470] [2019-11-23 22:07:24,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912363668] [2019-11-23 22:07:24,898 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 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 22:07:24,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:24,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:24,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:07:24,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:24,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:24,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 22:07:24,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451196439] [2019-11-23 22:07:24,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:07:24,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:07:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:24,965 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2019-11-23 22:07:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:25,071 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-11-23 22:07:25,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:07:25,072 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2019-11-23 22:07:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:25,073 INFO L225 Difference]: With dead ends: 78 [2019-11-23 22:07:25,073 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:07:25,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:07:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-23 22:07:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 22:07:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-11-23 22:07:25,078 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2019-11-23 22:07:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:25,078 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-11-23 22:07:25,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:07:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-11-23 22:07:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 22:07:25,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:25,079 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:25,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:25,282 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:25,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2019-11-23 22:07:25,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:25,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014906173] [2019-11-23 22:07:25,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:25,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014906173] [2019-11-23 22:07:25,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611390824] [2019-11-23 22:07:25,753 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 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 22:07:30,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 22:07:30,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:30,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:07:30,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:31,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:31,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 22:07:31,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288821056] [2019-11-23 22:07:31,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:07:31,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:07:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:07:31,016 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2019-11-23 22:07:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:31,142 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-11-23 22:07:31,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:07:31,142 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2019-11-23 22:07:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:31,143 INFO L225 Difference]: With dead ends: 80 [2019-11-23 22:07:31,143 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 22:07:31,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:07:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 22:07:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-23 22:07:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:07:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-11-23 22:07:31,148 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2019-11-23 22:07:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:31,148 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-11-23 22:07:31,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:07:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-11-23 22:07:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 22:07:31,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:31,149 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:31,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:31,352 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2019-11-23 22:07:31,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:31,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763206075] [2019-11-23 22:07:31,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:31,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763206075] [2019-11-23 22:07:31,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871603387] [2019-11-23 22:07:31,874 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 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 22:07:31,917 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:31,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:31,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:07:31,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:31,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:31,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 22:07:31,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338893035] [2019-11-23 22:07:31,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:07:31,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:07:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:07:31,944 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2019-11-23 22:07:32,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:32,057 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-11-23 22:07:32,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:07:32,057 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2019-11-23 22:07:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:32,058 INFO L225 Difference]: With dead ends: 82 [2019-11-23 22:07:32,058 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 22:07:32,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:07:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 22:07:32,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-23 22:07:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:07:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-11-23 22:07:32,063 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2019-11-23 22:07:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:32,063 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-11-23 22:07:32,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:07:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-11-23 22:07:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:07:32,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:32,064 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:32,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:32,266 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:32,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2019-11-23 22:07:32,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:32,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514204704] [2019-11-23 22:07:32,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:32,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514204704] [2019-11-23 22:07:32,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574428799] [2019-11-23 22:07:32,828 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 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 22:07:33,667 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 22:07:33,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:33,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:07:33,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:33,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:33,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 22:07:33,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58085693] [2019-11-23 22:07:33,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:07:33,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:07:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:07:33,693 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2019-11-23 22:07:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:33,845 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-11-23 22:07:33,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:07:33,845 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2019-11-23 22:07:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:33,846 INFO L225 Difference]: With dead ends: 84 [2019-11-23 22:07:33,846 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:07:33,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:07:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:07:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-23 22:07:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 22:07:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-11-23 22:07:33,850 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2019-11-23 22:07:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:33,850 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-11-23 22:07:33,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:07:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-11-23 22:07:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-23 22:07:33,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:33,851 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:34,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:34,056 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2019-11-23 22:07:34,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:34,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952296617] [2019-11-23 22:07:34,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:34,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952296617] [2019-11-23 22:07:34,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694032881] [2019-11-23 22:07:34,706 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 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 22:07:53,661 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 22:07:53,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:53,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:07:53,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:53,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:53,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 22:07:53,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009820587] [2019-11-23 22:07:53,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:07:53,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:53,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:07:53,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:07:53,700 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2019-11-23 22:07:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:53,853 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-11-23 22:07:53,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:07:53,854 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2019-11-23 22:07:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:53,855 INFO L225 Difference]: With dead ends: 86 [2019-11-23 22:07:53,855 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:07:53,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:07:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:07:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-11-23 22:07:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 22:07:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-11-23 22:07:53,859 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2019-11-23 22:07:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:53,860 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-11-23 22:07:53,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:07:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-11-23 22:07:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 22:07:53,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:53,861 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:54,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:54,062 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:54,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2019-11-23 22:07:54,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:54,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887739849] [2019-11-23 22:07:54,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:55,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887739849] [2019-11-23 22:07:55,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103871358] [2019-11-23 22:07:55,080 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 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 22:07:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:55,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:07:55,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:55,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:55,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 22:07:55,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736241661] [2019-11-23 22:07:55,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:07:55,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:07:55,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:07:55,158 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2019-11-23 22:07:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:55,343 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-11-23 22:07:55,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:07:55,343 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2019-11-23 22:07:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:55,344 INFO L225 Difference]: With dead ends: 88 [2019-11-23 22:07:55,344 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:07:55,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:07:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:07:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-11-23 22:07:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:07:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-11-23 22:07:55,350 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2019-11-23 22:07:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:55,350 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-11-23 22:07:55,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:07:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-11-23 22:07:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 22:07:55,351 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:55,352 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:55,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:55,556 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2019-11-23 22:07:55,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:55,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798884024] [2019-11-23 22:07:55,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:56,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798884024] [2019-11-23 22:07:56,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012492864] [2019-11-23 22:07:56,250 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 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 [2019-11-23 22:07:56,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:56,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:56,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:07:56,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:56,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:56,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 22:07:56,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142826692] [2019-11-23 22:07:56,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:07:56,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:07:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:07:56,321 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2019-11-23 22:07:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:56,475 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-11-23 22:07:56,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:07:56,480 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2019-11-23 22:07:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:56,481 INFO L225 Difference]: With dead ends: 90 [2019-11-23 22:07:56,481 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:07:56,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:07:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:07:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-11-23 22:07:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 22:07:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-11-23 22:07:56,485 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2019-11-23 22:07:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:56,485 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-11-23 22:07:56,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:07:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-11-23 22:07:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 22:07:56,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:56,486 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:56,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:56,689 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:56,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:56,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2019-11-23 22:07:56,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:56,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279783811] [2019-11-23 22:07:56,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:57,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279783811] [2019-11-23 22:07:57,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59944795] [2019-11-23 22:07:57,377 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:07,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2019-11-23 22:08:07,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:07,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:08:07,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:07,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:07,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 22:08:07,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938302166] [2019-11-23 22:08:07,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:08:07,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:08:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:08:07,899 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2019-11-23 22:08:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:08,033 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-11-23 22:08:08,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:08:08,033 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2019-11-23 22:08:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:08,034 INFO L225 Difference]: With dead ends: 92 [2019-11-23 22:08:08,034 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 22:08:08,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:08:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 22:08:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-11-23 22:08:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 22:08:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-11-23 22:08:08,039 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2019-11-23 22:08:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:08,039 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-11-23 22:08:08,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:08:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-11-23 22:08:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 22:08:08,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:08,040 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:08,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:08,248 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2019-11-23 22:08:08,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:08,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372791073] [2019-11-23 22:08:08,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:08,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372791073] [2019-11-23 22:08:08,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572396853] [2019-11-23 22:08:08,966 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:09,014 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:09,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:09,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 22:08:09,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:09,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:09,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 22:08:09,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117274880] [2019-11-23 22:08:09,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:08:09,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:09,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:08:09,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:08:09,044 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2019-11-23 22:08:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:09,192 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-11-23 22:08:09,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:08:09,193 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2019-11-23 22:08:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:09,194 INFO L225 Difference]: With dead ends: 94 [2019-11-23 22:08:09,194 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 22:08:09,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:08:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 22:08:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-23 22:08:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 22:08:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-11-23 22:08:09,199 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2019-11-23 22:08:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:09,199 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-11-23 22:08:09,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:08:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-11-23 22:08:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 22:08:09,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:09,200 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:09,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:09,404 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2019-11-23 22:08:09,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:09,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377890342] [2019-11-23 22:08:09,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:10,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377890342] [2019-11-23 22:08:10,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018651327] [2019-11-23 22:08:10,518 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:11,810 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2019-11-23 22:08:11,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:11,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:08:11,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:11,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:11,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 22:08:11,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131373670] [2019-11-23 22:08:11,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:08:11,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:11,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:08:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:08:11,834 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2019-11-23 22:08:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:12,023 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-11-23 22:08:12,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:08:12,024 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2019-11-23 22:08:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:12,025 INFO L225 Difference]: With dead ends: 96 [2019-11-23 22:08:12,025 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 22:08:12,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:08:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 22:08:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-23 22:08:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 22:08:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-11-23 22:08:12,030 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2019-11-23 22:08:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:12,030 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-11-23 22:08:12,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:08:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-11-23 22:08:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 22:08:12,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:12,031 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:12,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:12,238 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2019-11-23 22:08:12,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:12,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567018769] [2019-11-23 22:08:12,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:13,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567018769] [2019-11-23 22:08:13,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704453427] [2019-11-23 22:08:13,001 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:43,820 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-11-23 22:08:43,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:43,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 22:08:43,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:43,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:43,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-11-23 22:08:43,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304858332] [2019-11-23 22:08:43,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 22:08:43,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:43,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 22:08:43,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:08:43,860 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2019-11-23 22:08:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:43,999 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-11-23 22:08:44,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:08:44,003 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2019-11-23 22:08:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:44,004 INFO L225 Difference]: With dead ends: 98 [2019-11-23 22:08:44,004 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 22:08:44,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:08:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 22:08:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-11-23 22:08:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-23 22:08:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-11-23 22:08:44,008 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2019-11-23 22:08:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:44,009 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-11-23 22:08:44,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 22:08:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-11-23 22:08:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-23 22:08:44,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:44,009 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:44,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:44,222 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:44,222 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2019-11-23 22:08:44,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:44,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013277065] [2019-11-23 22:08:44,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY