/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/array-examples/standard_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:31:36,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:31:36,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:31:36,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:31:36,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:31:36,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:31:36,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:31:36,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:31:36,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:31:36,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:31:36,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:31:36,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:31:36,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:31:36,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:31:36,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:31:36,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:31:36,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:31:36,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:31:36,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:31:36,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:31:36,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:31:36,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:31:36,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:31:36,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:31:36,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:31:36,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:31:36,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:31:36,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:31:36,597 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 20:31:36,633 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:31:36,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:31:36,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:31:36,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:31:36,638 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:31:36,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:31:36,638 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:31:36,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:31:36,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:31:36,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:31:36,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:31:36,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:31:36,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:31:36,640 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:31:36,640 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:31:36,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:31:36,640 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:31:36,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:31:36,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:31:36,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:31:36,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:31:36,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:31:36,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:31:36,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:31:36,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:31:36,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:31:36,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:31:36,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:31:36,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:31:36,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:31:36,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:31:36,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:31:36,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:31:36,967 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:31:36,968 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:31:36,969 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-11-23 20:31:37,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84edee75d/3dc92875ec674362ab8d7e369b7d6192/FLAG688ddd8e1 [2019-11-23 20:31:37,554 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:31:37,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-11-23 20:31:37,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84edee75d/3dc92875ec674362ab8d7e369b7d6192/FLAG688ddd8e1 [2019-11-23 20:31:37,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84edee75d/3dc92875ec674362ab8d7e369b7d6192 [2019-11-23 20:31:37,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:31:37,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:31:37,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:37,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:31:37,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:31:37,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:37" (1/1) ... [2019-11-23 20:31:37,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408dfa8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:37, skipping insertion in model container [2019-11-23 20:31:37,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:37" (1/1) ... [2019-11-23 20:31:37,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:31:38,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:31:38,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:38,191 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:31:38,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:38,229 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:31:38,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38 WrapperNode [2019-11-23 20:31:38,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:38,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:38,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:31:38,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:31:38,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:38,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:31:38,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:31:38,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:31:38,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (1/1) ... [2019-11-23 20:31:38,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:31:38,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:31:38,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:31:38,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:31:38,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (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 20:31:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:31:38,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:31:38,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:31:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:31:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:31:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:31:38,682 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:31:38,683 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:31:38,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:38 BoogieIcfgContainer [2019-11-23 20:31:38,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:31:38,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:31:38,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:31:38,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:31:38,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:37" (1/3) ... [2019-11-23 20:31:38,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ddb82a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:38, skipping insertion in model container [2019-11-23 20:31:38,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:38" (2/3) ... [2019-11-23 20:31:38,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ddb82a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:38, skipping insertion in model container [2019-11-23 20:31:38,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:38" (3/3) ... [2019-11-23 20:31:38,693 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2019-11-23 20:31:38,704 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:31:38,711 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:31:38,726 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:31:38,764 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:31:38,764 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:31:38,764 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:31:38,765 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:31:38,765 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:31:38,765 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:31:38,765 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:31:38,765 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:31:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-23 20:31:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:31:38,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:38,791 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:38,792 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2019-11-23 20:31:38,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:38,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054085311] [2019-11-23 20:31:38,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:38,934 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 20:31:38,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054085311] [2019-11-23 20:31:38,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:38,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:31:38,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580456473] [2019-11-23 20:31:38,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:31:38,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:38,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:31:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:31:38,968 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-23 20:31:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:38,996 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2019-11-23 20:31:38,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:31:38,998 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:31:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:39,014 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:31:39,015 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:31:39,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:31:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:31:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:31:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:31:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 20:31:39,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2019-11-23 20:31:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:39,081 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 20:31:39,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:31:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 20:31:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:31:39,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:39,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:39,084 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2015341610, now seen corresponding path program 1 times [2019-11-23 20:31:39,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:39,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655238282] [2019-11-23 20:31:39,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:39,179 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 20:31:39,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655238282] [2019-11-23 20:31:39,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:39,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:31:39,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321213733] [2019-11-23 20:31:39,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:31:39,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:31:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:31:39,185 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2019-11-23 20:31:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:39,235 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-11-23 20:31:39,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:31:39,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:31:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:39,236 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:31:39,236 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:31:39,237 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 20:31:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:31:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2019-11-23 20:31:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:31:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:31:39,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2019-11-23 20:31:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:39,243 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:31:39,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:31:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:31:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:31:39,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:39,245 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:39,245 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:39,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2019-11-23 20:31:39,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:39,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522906826] [2019-11-23 20:31:39,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:39,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522906826] [2019-11-23 20:31:39,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767832463] [2019-11-23 20:31:39,310 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 20:31:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:39,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:31:39,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:39,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:39,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:31:39,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816600135] [2019-11-23 20:31:39,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:31:39,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:39,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:31:39,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:31:39,422 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-23 20:31:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:39,481 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2019-11-23 20:31:39,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:31:39,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:31:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:39,483 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:31:39,483 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:31:39,484 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 20:31:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:31:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-11-23 20:31:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:31:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-23 20:31:39,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-11-23 20:31:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:39,490 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-23 20:31:39,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:31:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-23 20:31:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:31:39,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:39,492 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:39,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:39,701 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash 594582322, now seen corresponding path program 2 times [2019-11-23 20:31:39,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:39,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027048381] [2019-11-23 20:31:39,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:39,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027048381] [2019-11-23 20:31:39,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815328875] [2019-11-23 20:31:39,785 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 20:31:39,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:39,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:39,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:31:39,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:39,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:39,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:31:39,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591319543] [2019-11-23 20:31:39,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:31:39,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:39,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:31:39,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:31:39,867 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2019-11-23 20:31:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:39,957 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-11-23 20:31:39,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:31:39,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 20:31:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:39,959 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:31:39,959 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:31:39,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 20:31:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:31:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:31:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:31:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-23 20:31:39,969 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2019-11-23 20:31:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:39,970 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-23 20:31:39,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:31:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-23 20:31:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:31:39,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:39,974 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:40,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:40,177 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:40,178 INFO L82 PathProgramCache]: Analyzing trace with hash -848302731, now seen corresponding path program 3 times [2019-11-23 20:31:40,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:40,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763206197] [2019-11-23 20:31:40,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:31:40,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763206197] [2019-11-23 20:31:40,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150697961] [2019-11-23 20:31:40,300 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 20:31:40,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:31:40,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:40,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:31:40,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:31:40,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:40,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:31:40,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089570971] [2019-11-23 20:31:40,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:31:40,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:40,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:31:40,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:31:40,381 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2019-11-23 20:31:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:40,460 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2019-11-23 20:31:40,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:31:40,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-11-23 20:31:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:40,461 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:31:40,461 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:31:40,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 20:31:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:31:40,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-11-23 20:31:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:31:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-23 20:31:40,468 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2019-11-23 20:31:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:40,469 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-23 20:31:40,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:31:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-23 20:31:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:31:40,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:40,470 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:40,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:40,674 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:40,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1208394382, now seen corresponding path program 4 times [2019-11-23 20:31:40,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:40,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607265407] [2019-11-23 20:31:40,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:40,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607265407] [2019-11-23 20:31:40,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672501255] [2019-11-23 20:31:40,785 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 20:31:40,826 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:40,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:40,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:31:40,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:40,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:40,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:31:40,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669270802] [2019-11-23 20:31:40,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:31:40,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:40,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:31:40,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:31:40,847 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-11-23 20:31:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:40,937 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2019-11-23 20:31:40,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:31:40,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-11-23 20:31:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:40,939 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:31:40,939 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:31:40,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 20:31:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:31:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-11-23 20:31:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:31:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-11-23 20:31:40,948 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2019-11-23 20:31:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:40,948 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-11-23 20:31:40,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:31:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-11-23 20:31:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:31:40,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:40,950 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,154 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,154 INFO L82 PathProgramCache]: Analyzing trace with hash -695706087, now seen corresponding path program 5 times [2019-11-23 20:31:41,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986342735] [2019-11-23 20:31:41,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:41,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986342735] [2019-11-23 20:31:41,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120651] [2019-11-23 20:31:41,295 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 20:31:41,352 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:31:41,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:41,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:31:41,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:41,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:41,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:31:41,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653570135] [2019-11-23 20:31:41,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:31:41,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:31:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:31:41,374 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2019-11-23 20:31:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:41,450 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2019-11-23 20:31:41,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:31:41,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-23 20:31:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:41,451 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:31:41,451 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:31:41,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 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 20:31:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:31:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-11-23 20:31:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:31:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-23 20:31:41,457 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 34 [2019-11-23 20:31:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:41,458 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-23 20:31:41,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:31:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-23 20:31:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:31:41,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,459 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,669 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2123093526, now seen corresponding path program 6 times [2019-11-23 20:31:41,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857668025] [2019-11-23 20:31:41,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:41,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857668025] [2019-11-23 20:31:41,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70188114] [2019-11-23 20:31:41,813 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 20:31:41,872 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:31:41,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:41,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:31:41,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:31:41,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:41,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:31:41,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563496483] [2019-11-23 20:31:41,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:31:41,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:31:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:31:41,895 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 10 states. [2019-11-23 20:31:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:41,982 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2019-11-23 20:31:41,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:31:41,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-11-23 20:31:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:41,983 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:31:41,983 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:31:41,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 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 20:31:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:31:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-11-23 20:31:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:31:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-11-23 20:31:41,990 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 39 [2019-11-23 20:31:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:41,990 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-11-23 20:31:41,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:31:41,991 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-11-23 20:31:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:31:41,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,992 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:42,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,193 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash 133197501, now seen corresponding path program 7 times [2019-11-23 20:31:42,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:42,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30551998] [2019-11-23 20:31:42,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:42,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30551998] [2019-11-23 20:31:42,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959015823] [2019-11-23 20:31:42,313 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 20:31:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:31:42,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:42,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:31:42,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405110720] [2019-11-23 20:31:42,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:31:42,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:31:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:42,403 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 11 states. [2019-11-23 20:31:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:42,506 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2019-11-23 20:31:42,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:31:42,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-11-23 20:31:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:42,507 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:31:42,508 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:31:42,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 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 20:31:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:31:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-11-23 20:31:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:31:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-23 20:31:42,514 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 44 [2019-11-23 20:31:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:42,514 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-23 20:31:42,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:31:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-23 20:31:42,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:31:42,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:42,516 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:42,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,719 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:42,720 INFO L82 PathProgramCache]: Analyzing trace with hash -133500602, now seen corresponding path program 8 times [2019-11-23 20:31:42,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:42,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685248200] [2019-11-23 20:31:42,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:42,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685248200] [2019-11-23 20:31:42,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145849196] [2019-11-23 20:31:42,855 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:31:42,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:42,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:42,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:31:42,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:42,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:31:42,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537704642] [2019-11-23 20:31:42,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:31:42,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:31:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:31:42,945 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 12 states. [2019-11-23 20:31:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:43,043 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2019-11-23 20:31:43,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:31:43,043 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:31:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:43,044 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:31:43,044 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:31:43,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 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 20:31:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:31:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-11-23 20:31:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:31:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2019-11-23 20:31:43,050 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 49 [2019-11-23 20:31:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:43,051 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2019-11-23 20:31:43,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:31:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2019-11-23 20:31:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:31:43,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:43,052 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:43,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,260 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:43,260 INFO L82 PathProgramCache]: Analyzing trace with hash 949378913, now seen corresponding path program 9 times [2019-11-23 20:31:43,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:43,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353270593] [2019-11-23 20:31:43,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:43,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353270593] [2019-11-23 20:31:43,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724153934] [2019-11-23 20:31:43,364 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 20:31:43,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:31:43,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:43,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:31:43,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:43,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:43,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:31:43,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952677562] [2019-11-23 20:31:43,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:31:43,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:31:43,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:31:43,476 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 13 states. [2019-11-23 20:31:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:43,591 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2019-11-23 20:31:43,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:31:43,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2019-11-23 20:31:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:43,593 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:31:43,593 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:31:43,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 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 20:31:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:31:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-11-23 20:31:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:31:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2019-11-23 20:31:43,599 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 54 [2019-11-23 20:31:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:43,599 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2019-11-23 20:31:43,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:31:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2019-11-23 20:31:43,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:31:43,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:43,601 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:43,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,805 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:43,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1285339298, now seen corresponding path program 10 times [2019-11-23 20:31:43,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:43,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929544421] [2019-11-23 20:31:43,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:31:43,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929544421] [2019-11-23 20:31:43,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270030556] [2019-11-23 20:31:43,945 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 20:31:43,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:43,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:43,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:31:43,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:31:44,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:44,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:31:44,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458215590] [2019-11-23 20:31:44,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:31:44,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:44,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:31:44,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:31:44,014 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 14 states. [2019-11-23 20:31:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:44,130 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2019-11-23 20:31:44,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:31:44,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2019-11-23 20:31:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:44,134 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:31:44,134 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:31:44,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 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 20:31:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:31:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2019-11-23 20:31:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:31:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2019-11-23 20:31:44,143 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2019-11-23 20:31:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:44,144 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2019-11-23 20:31:44,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:31:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2019-11-23 20:31:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:31:44,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:44,145 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:44,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:44,357 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:44,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash -655855611, now seen corresponding path program 11 times [2019-11-23 20:31:44,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:44,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091977973] [2019-11-23 20:31:44,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:44,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091977973] [2019-11-23 20:31:44,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989039748] [2019-11-23 20:31:44,524 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 20:31:44,633 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:31:44,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:44,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:31:44,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:44,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:44,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:31:44,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645253025] [2019-11-23 20:31:44,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:31:44,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:31:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:31:44,664 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 15 states. [2019-11-23 20:31:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:44,786 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2019-11-23 20:31:44,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:31:44,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2019-11-23 20:31:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:44,787 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:31:44,787 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:31:44,788 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:31:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:31:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-11-23 20:31:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:31:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2019-11-23 20:31:44,793 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 64 [2019-11-23 20:31:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:44,794 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2019-11-23 20:31:44,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:31:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2019-11-23 20:31:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:31:44,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:44,795 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:44,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:44,999 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:45,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1954234366, now seen corresponding path program 12 times [2019-11-23 20:31:45,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:45,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727557017] [2019-11-23 20:31:45,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:45,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727557017] [2019-11-23 20:31:45,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816279226] [2019-11-23 20:31:45,155 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 20:31:45,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:31:45,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:45,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:31:45,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:31:45,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:45,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:31:45,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980690680] [2019-11-23 20:31:45,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:31:45,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:31:45,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:31:45,379 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 16 states. [2019-11-23 20:31:45,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:45,496 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2019-11-23 20:31:45,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:31:45,496 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-23 20:31:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:45,497 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:31:45,497 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:31:45,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 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 20:31:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:31:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2019-11-23 20:31:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:31:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2019-11-23 20:31:45,504 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 69 [2019-11-23 20:31:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:45,505 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2019-11-23 20:31:45,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:31:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2019-11-23 20:31:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:31:45,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:45,506 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:45,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:45,710 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:45,711 INFO L82 PathProgramCache]: Analyzing trace with hash 383049897, now seen corresponding path program 13 times [2019-11-23 20:31:45,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:45,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686366576] [2019-11-23 20:31:45,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:31:45,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686366576] [2019-11-23 20:31:45,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809387531] [2019-11-23 20:31:45,892 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 20:31:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:45,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:31:45,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:31:45,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:45,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:31:45,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403406011] [2019-11-23 20:31:45,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:31:45,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:31:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:31:45,980 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 17 states. [2019-11-23 20:31:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:46,109 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2019-11-23 20:31:46,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:31:46,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2019-11-23 20:31:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:46,110 INFO L225 Difference]: With dead ends: 133 [2019-11-23 20:31:46,110 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:31:46,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 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 20:31:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:31:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2019-11-23 20:31:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:31:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2019-11-23 20:31:46,121 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 74 [2019-11-23 20:31:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:46,121 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2019-11-23 20:31:46,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:31:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2019-11-23 20:31:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:31:46,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:46,122 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:46,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:46,326 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:46,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1787279526, now seen corresponding path program 14 times [2019-11-23 20:31:46,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:46,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703728715] [2019-11-23 20:31:46,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:31:46,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703728715] [2019-11-23 20:31:46,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507713881] [2019-11-23 20:31:46,505 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 20:31:46,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:46,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:46,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:31:46,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:31:46,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:46,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:31:46,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173352411] [2019-11-23 20:31:46,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:31:46,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:46,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:31:46,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:31:46,610 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 18 states. [2019-11-23 20:31:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:46,796 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2019-11-23 20:31:46,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:31:46,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-11-23 20:31:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:46,798 INFO L225 Difference]: With dead ends: 141 [2019-11-23 20:31:46,798 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 20:31:46,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 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 20:31:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 20:31:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-11-23 20:31:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:31:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2019-11-23 20:31:46,808 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 79 [2019-11-23 20:31:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:46,810 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2019-11-23 20:31:46,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:31:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2019-11-23 20:31:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:31:46,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:46,812 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:47,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:47,016 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash 30011725, now seen corresponding path program 15 times [2019-11-23 20:31:47,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:47,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880043719] [2019-11-23 20:31:47,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:31:47,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880043719] [2019-11-23 20:31:47,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189011462] [2019-11-23 20:31:47,202 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 20:31:47,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:31:47,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:47,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:31:47,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:31:47,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:47,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:31:47,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261068136] [2019-11-23 20:31:47,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:31:47,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:47,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:31:47,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:31:47,488 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 19 states. [2019-11-23 20:31:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:47,624 INFO L93 Difference]: Finished difference Result 149 states and 186 transitions. [2019-11-23 20:31:47,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:31:47,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2019-11-23 20:31:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:47,626 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:31:47,626 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:31:47,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 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 20:31:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:31:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2019-11-23 20:31:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:31:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2019-11-23 20:31:47,631 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 84 [2019-11-23 20:31:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:47,632 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2019-11-23 20:31:47,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:31:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2019-11-23 20:31:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:31:47,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:47,633 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:47,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:47,843 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash -505049418, now seen corresponding path program 16 times [2019-11-23 20:31:47,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:47,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797995913] [2019-11-23 20:31:47,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:31:48,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797995913] [2019-11-23 20:31:48,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326850581] [2019-11-23 20:31:48,093 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 20:31:48,179 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:48,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:48,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:31:48,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:31:48,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:48,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:31:48,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758627239] [2019-11-23 20:31:48,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:31:48,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:48,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:31:48,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:31:48,206 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 20 states. [2019-11-23 20:31:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:48,357 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2019-11-23 20:31:48,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:31:48,357 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2019-11-23 20:31:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:48,358 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:31:48,358 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:31:48,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 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 20:31:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:31:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2019-11-23 20:31:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:31:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2019-11-23 20:31:48,363 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 89 [2019-11-23 20:31:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:48,363 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2019-11-23 20:31:48,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:31:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2019-11-23 20:31:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 20:31:48,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:48,364 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:48,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:48,573 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1363811855, now seen corresponding path program 17 times [2019-11-23 20:31:48,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:48,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423755092] [2019-11-23 20:31:48,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:31:48,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423755092] [2019-11-23 20:31:48,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652472795] [2019-11-23 20:31:48,795 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 20:31:49,033 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:31:49,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:49,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:31:49,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:31:49,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:49,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:31:49,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175871598] [2019-11-23 20:31:49,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:31:49,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:49,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:31:49,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:31:49,059 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 21 states. [2019-11-23 20:31:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:49,245 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2019-11-23 20:31:49,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:31:49,245 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2019-11-23 20:31:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:49,246 INFO L225 Difference]: With dead ends: 165 [2019-11-23 20:31:49,246 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 20:31:49,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 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 20:31:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 20:31:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2019-11-23 20:31:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:31:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2019-11-23 20:31:49,251 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 94 [2019-11-23 20:31:49,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:49,251 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2019-11-23 20:31:49,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:31:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2019-11-23 20:31:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:31:49,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:49,252 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:49,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:49,461 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1955911186, now seen corresponding path program 18 times [2019-11-23 20:31:49,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:49,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584659974] [2019-11-23 20:31:49,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-23 20:31:49,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584659974] [2019-11-23 20:31:49,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447935470] [2019-11-23 20:31:49,683 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 20:31:50,163 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:31:50,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:50,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:31:50,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 35 proven. 477 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:31:50,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:50,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 24 [2019-11-23 20:31:50,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913005084] [2019-11-23 20:31:50,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:31:50,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:50,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:31:50,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:31:50,223 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand 24 states. [2019-11-23 20:31:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:50,397 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2019-11-23 20:31:50,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:31:50,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2019-11-23 20:31:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:50,398 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:31:50,399 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:31:50,399 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:31:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:31:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-11-23 20:31:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:31:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2019-11-23 20:31:50,404 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 99 [2019-11-23 20:31:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:50,404 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2019-11-23 20:31:50,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:31:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2019-11-23 20:31:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:31:50,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:50,406 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:50,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:50,610 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:50,611 INFO L82 PathProgramCache]: Analyzing trace with hash 752344430, now seen corresponding path program 19 times [2019-11-23 20:31:50,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:50,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303706961] [2019-11-23 20:31:50,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:31:50,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303706961] [2019-11-23 20:31:50,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677448288] [2019-11-23 20:31:50,918 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 20:31:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:50,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:31:51,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:31:51,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:51,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:31:51,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917631941] [2019-11-23 20:31:51,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:31:51,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:31:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:31:51,036 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand 24 states. [2019-11-23 20:31:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:51,239 INFO L93 Difference]: Finished difference Result 189 states and 236 transitions. [2019-11-23 20:31:51,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:31:51,239 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2019-11-23 20:31:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:51,241 INFO L225 Difference]: With dead ends: 189 [2019-11-23 20:31:51,241 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 20:31:51,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 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 20:31:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 20:31:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2019-11-23 20:31:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-23 20:31:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2019-11-23 20:31:51,246 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 109 [2019-11-23 20:31:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:51,246 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2019-11-23 20:31:51,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:31:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2019-11-23 20:31:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-23 20:31:51,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:51,248 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:51,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:51,451 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:51,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1783930055, now seen corresponding path program 20 times [2019-11-23 20:31:51,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:51,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355258542] [2019-11-23 20:31:51,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:31:51,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355258542] [2019-11-23 20:31:51,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436109470] [2019-11-23 20:31:51,764 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 20:31:51,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:51,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:51,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:31:51,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:31:51,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:51,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:31:51,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83822631] [2019-11-23 20:31:51,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:31:51,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:51,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:31:51,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:31:51,864 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 25 states. [2019-11-23 20:31:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:52,087 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2019-11-23 20:31:52,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:31:52,090 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2019-11-23 20:31:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:52,091 INFO L225 Difference]: With dead ends: 197 [2019-11-23 20:31:52,091 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:31:52,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 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 20:31:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:31:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2019-11-23 20:31:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 20:31:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2019-11-23 20:31:52,096 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 114 [2019-11-23 20:31:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:52,096 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2019-11-23 20:31:52,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:31:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2019-11-23 20:31:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:31:52,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:52,097 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:52,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:52,305 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:52,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1971297078, now seen corresponding path program 21 times [2019-11-23 20:31:52,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:52,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177601755] [2019-11-23 20:31:52,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 20:31:52,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177601755] [2019-11-23 20:31:52,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774928641] [2019-11-23 20:31:52,599 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 20:31:53,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2019-11-23 20:31:53,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:53,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:31:53,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 20:31:53,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:53,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:31:53,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38535899] [2019-11-23 20:31:53,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:31:53,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:53,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:31:53,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:31:53,852 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand 26 states. [2019-11-23 20:31:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:54,062 INFO L93 Difference]: Finished difference Result 205 states and 256 transitions. [2019-11-23 20:31:54,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:31:54,063 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2019-11-23 20:31:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:54,064 INFO L225 Difference]: With dead ends: 205 [2019-11-23 20:31:54,064 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 20:31:54,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 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 20:31:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 20:31:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2019-11-23 20:31:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-23 20:31:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2019-11-23 20:31:54,071 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 119 [2019-11-23 20:31:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:54,071 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2019-11-23 20:31:54,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:31:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2019-11-23 20:31:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 20:31:54,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:54,072 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:54,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:54,277 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1494315997, now seen corresponding path program 22 times [2019-11-23 20:31:54,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:54,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975132262] [2019-11-23 20:31:54,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-11-23 20:31:54,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975132262] [2019-11-23 20:31:54,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966180949] [2019-11-23 20:31:54,592 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 20:31:54,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:54,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:54,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:31:54,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-11-23 20:31:54,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:54,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:31:54,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060219825] [2019-11-23 20:31:54,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:31:54,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:54,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:31:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:31:54,688 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 27 states. [2019-11-23 20:31:54,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:54,896 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2019-11-23 20:31:54,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:31:54,896 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 124 [2019-11-23 20:31:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:54,897 INFO L225 Difference]: With dead ends: 213 [2019-11-23 20:31:54,897 INFO L226 Difference]: Without dead ends: 135 [2019-11-23 20:31:54,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 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 20:31:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-23 20:31:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2019-11-23 20:31:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-23 20:31:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2019-11-23 20:31:54,902 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 124 [2019-11-23 20:31:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:54,902 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2019-11-23 20:31:54,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:31:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2019-11-23 20:31:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 20:31:54,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:54,903 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:55,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:55,107 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1981797338, now seen corresponding path program 23 times [2019-11-23 20:31:55,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:55,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023593132] [2019-11-23 20:31:55,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-11-23 20:31:55,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023593132] [2019-11-23 20:31:55,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015649499] [2019-11-23 20:31:55,564 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 20:31:56,756 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 20:31:56,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:56,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:31:56,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-11-23 20:31:56,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:56,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:31:56,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207372141] [2019-11-23 20:31:56,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:31:56,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:56,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:31:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:31:56,787 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand 28 states. [2019-11-23 20:31:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:57,046 INFO L93 Difference]: Finished difference Result 221 states and 276 transitions. [2019-11-23 20:31:57,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:31:57,047 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 129 [2019-11-23 20:31:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:57,048 INFO L225 Difference]: With dead ends: 221 [2019-11-23 20:31:57,048 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:31:57,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:31:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:31:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2019-11-23 20:31:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-23 20:31:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2019-11-23 20:31:57,053 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 129 [2019-11-23 20:31:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:57,054 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2019-11-23 20:31:57,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:31:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2019-11-23 20:31:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-23 20:31:57,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:57,056 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:57,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:57,264 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:57,264 INFO L82 PathProgramCache]: Analyzing trace with hash 958882945, now seen corresponding path program 24 times [2019-11-23 20:31:57,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:57,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568179017] [2019-11-23 20:31:57,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-11-23 20:31:57,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568179017] [2019-11-23 20:31:57,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151680117] [2019-11-23 20:31:57,666 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 20:31:59,475 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-11-23 20:31:59,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:59,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:31:59,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-11-23 20:31:59,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:59,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:31:59,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760801688] [2019-11-23 20:31:59,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:31:59,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:59,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:31:59,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:31:59,511 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand 29 states. [2019-11-23 20:31:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:59,745 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2019-11-23 20:31:59,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:31:59,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 134 [2019-11-23 20:31:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:59,747 INFO L225 Difference]: With dead ends: 229 [2019-11-23 20:31:59,747 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 20:31:59,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:31:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 20:31:59,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2019-11-23 20:31:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:31:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2019-11-23 20:31:59,753 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 134 [2019-11-23 20:31:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:59,754 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2019-11-23 20:31:59,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:31:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2019-11-23 20:31:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:31:59,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:59,755 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:59,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:59,960 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2143875970, now seen corresponding path program 25 times [2019-11-23 20:31:59,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:59,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757465056] [2019-11-23 20:31:59,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-11-23 20:32:00,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757465056] [2019-11-23 20:32:00,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082417194] [2019-11-23 20:32:00,465 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 20:32:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:00,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:32:00,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-11-23 20:32:00,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:00,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:32:00,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718955541] [2019-11-23 20:32:00,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:32:00,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:00,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:32:00,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:32:00,648 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand 30 states. [2019-11-23 20:32:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:00,899 INFO L93 Difference]: Finished difference Result 237 states and 296 transitions. [2019-11-23 20:32:00,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:32:00,900 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-23 20:32:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:00,901 INFO L225 Difference]: With dead ends: 237 [2019-11-23 20:32:00,901 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 20:32:00,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 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 20:32:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 20:32:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2019-11-23 20:32:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-23 20:32:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 176 transitions. [2019-11-23 20:32:00,907 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 176 transitions. Word has length 139 [2019-11-23 20:32:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:00,908 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 176 transitions. [2019-11-23 20:32:00,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:32:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 176 transitions. [2019-11-23 20:32:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-23 20:32:00,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:00,909 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:01,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:01,112 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2107935451, now seen corresponding path program 26 times [2019-11-23 20:32:01,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:01,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432692074] [2019-11-23 20:32:01,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2019-11-23 20:32:01,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432692074] [2019-11-23 20:32:01,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764726934] [2019-11-23 20:32:01,668 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 20:32:01,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:32:01,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:01,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:32:01,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2019-11-23 20:32:01,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:01,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:32:01,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568077867] [2019-11-23 20:32:01,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:32:01,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:32:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:32:01,832 INFO L87 Difference]: Start difference. First operand 147 states and 176 transitions. Second operand 31 states. [2019-11-23 20:32:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:02,110 INFO L93 Difference]: Finished difference Result 245 states and 306 transitions. [2019-11-23 20:32:02,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:32:02,110 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 144 [2019-11-23 20:32:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:02,111 INFO L225 Difference]: With dead ends: 245 [2019-11-23 20:32:02,111 INFO L226 Difference]: Without dead ends: 155 [2019-11-23 20:32:02,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 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 20:32:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-11-23 20:32:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2019-11-23 20:32:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-23 20:32:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 182 transitions. [2019-11-23 20:32:02,117 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 182 transitions. Word has length 144 [2019-11-23 20:32:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:02,117 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 182 transitions. [2019-11-23 20:32:02,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:32:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 182 transitions. [2019-11-23 20:32:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 20:32:02,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:02,118 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:02,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:02,322 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash -175342882, now seen corresponding path program 27 times [2019-11-23 20:32:02,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:02,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980919707] [2019-11-23 20:32:02,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2019-11-23 20:32:02,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980919707] [2019-11-23 20:32:02,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065902776] [2019-11-23 20:32:02,829 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 20:32:06,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2019-11-23 20:32:06,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:06,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:32:06,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 55 proven. 1162 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 20:32:06,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:06,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 34 [2019-11-23 20:32:06,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548377249] [2019-11-23 20:32:06,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:32:06,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:32:06,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:32:06,764 INFO L87 Difference]: Start difference. First operand 152 states and 182 transitions. Second operand 34 states. [2019-11-23 20:32:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:07,031 INFO L93 Difference]: Finished difference Result 255 states and 320 transitions. [2019-11-23 20:32:07,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:32:07,031 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2019-11-23 20:32:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:07,032 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:32:07,032 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:32:07,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:32:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:32:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2019-11-23 20:32:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:32:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 194 transitions. [2019-11-23 20:32:07,040 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 194 transitions. Word has length 149 [2019-11-23 20:32:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:07,040 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 194 transitions. [2019-11-23 20:32:07,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:32:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 194 transitions. [2019-11-23 20:32:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:32:07,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:07,041 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:07,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:07,248 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:07,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2063826374, now seen corresponding path program 28 times [2019-11-23 20:32:07,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:07,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173175188] [2019-11-23 20:32:07,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2019-11-23 20:32:07,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173175188] [2019-11-23 20:32:07,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982391038] [2019-11-23 20:32:07,834 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 20:32:07,927 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:32:07,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:07,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:32:07,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 20:32:07,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:07,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 20:32:07,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680735376] [2019-11-23 20:32:07,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:32:07,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:32:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:32:07,966 INFO L87 Difference]: Start difference. First operand 162 states and 194 transitions. Second operand 34 states. [2019-11-23 20:32:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:08,278 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2019-11-23 20:32:08,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:32:08,279 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 159 [2019-11-23 20:32:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:08,280 INFO L225 Difference]: With dead ends: 269 [2019-11-23 20:32:08,281 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:32:08,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:32:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:32:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2019-11-23 20:32:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-11-23 20:32:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2019-11-23 20:32:08,290 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 159 [2019-11-23 20:32:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:08,291 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2019-11-23 20:32:08,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:32:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2019-11-23 20:32:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 20:32:08,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:08,293 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:08,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:08,494 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:08,494 INFO L82 PathProgramCache]: Analyzing trace with hash -111741331, now seen corresponding path program 29 times [2019-11-23 20:32:08,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:08,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245880797] [2019-11-23 20:32:08,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2019-11-23 20:32:09,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245880797] [2019-11-23 20:32:09,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592622128] [2019-11-23 20:32:09,097 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:32:18,614 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2019-11-23 20:32:18,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:18,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:32:18,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-11-23 20:32:18,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:18,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:32:18,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938960592] [2019-11-23 20:32:18,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:32:18,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:32:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:32:18,698 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand 35 states. [2019-11-23 20:32:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:18,946 INFO L93 Difference]: Finished difference Result 277 states and 346 transitions. [2019-11-23 20:32:18,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:32:18,947 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 164 [2019-11-23 20:32:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:18,948 INFO L225 Difference]: With dead ends: 277 [2019-11-23 20:32:18,948 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 20:32:18,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:32:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 20:32:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2019-11-23 20:32:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:32:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 206 transitions. [2019-11-23 20:32:18,954 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 206 transitions. Word has length 164 [2019-11-23 20:32:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:18,954 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 206 transitions. [2019-11-23 20:32:18,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:32:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 206 transitions. [2019-11-23 20:32:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 20:32:18,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:18,955 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:19,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:19,165 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1268069994, now seen corresponding path program 30 times [2019-11-23 20:32:19,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:19,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659323406] [2019-11-23 20:32:19,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-11-23 20:32:19,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659323406] [2019-11-23 20:32:19,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545114027] [2019-11-23 20:32:19,848 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 20:32:24,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2019-11-23 20:32:24,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:24,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:32:24,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-11-23 20:32:24,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:24,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:32:24,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881461566] [2019-11-23 20:32:24,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:32:24,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:32:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:32:24,255 INFO L87 Difference]: Start difference. First operand 172 states and 206 transitions. Second operand 36 states. [2019-11-23 20:32:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:24,543 INFO L93 Difference]: Finished difference Result 285 states and 356 transitions. [2019-11-23 20:32:24,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:32:24,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 169 [2019-11-23 20:32:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:24,545 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:32:24,545 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 20:32:24,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:32:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 20:32:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2019-11-23 20:32:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-23 20:32:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 212 transitions. [2019-11-23 20:32:24,552 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 212 transitions. Word has length 169 [2019-11-23 20:32:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:24,552 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 212 transitions. [2019-11-23 20:32:24,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:32:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 212 transitions. [2019-11-23 20:32:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-23 20:32:24,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:24,553 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:24,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:24,759 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:24,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1552226543, now seen corresponding path program 31 times [2019-11-23 20:32:24,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:24,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533711661] [2019-11-23 20:32:24,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2019-11-23 20:32:25,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533711661] [2019-11-23 20:32:25,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856500928] [2019-11-23 20:32:25,322 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 20:32:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:25,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:32:25,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2019-11-23 20:32:25,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:25,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:32:25,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183242778] [2019-11-23 20:32:25,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:32:25,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:25,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:32:25,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:32:25,475 INFO L87 Difference]: Start difference. First operand 177 states and 212 transitions. Second operand 37 states. [2019-11-23 20:32:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:25,776 INFO L93 Difference]: Finished difference Result 293 states and 366 transitions. [2019-11-23 20:32:25,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:32:25,777 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 174 [2019-11-23 20:32:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:25,778 INFO L225 Difference]: With dead ends: 293 [2019-11-23 20:32:25,778 INFO L226 Difference]: Without dead ends: 185 [2019-11-23 20:32:25,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 174 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 20:32:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-11-23 20:32:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2019-11-23 20:32:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-23 20:32:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2019-11-23 20:32:25,784 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 174 [2019-11-23 20:32:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:25,785 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2019-11-23 20:32:25,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:32:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2019-11-23 20:32:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 20:32:25,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:25,786 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:25,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:25,989 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash -760672014, now seen corresponding path program 32 times [2019-11-23 20:32:25,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:25,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714015726] [2019-11-23 20:32:25,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2019-11-23 20:32:26,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714015726] [2019-11-23 20:32:26,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719212817] [2019-11-23 20:32:26,556 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 20:32:26,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:32:26,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:26,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:32:26,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2019-11-23 20:32:26,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:26,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:32:26,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562646752] [2019-11-23 20:32:26,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:32:26,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:26,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:32:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:32:26,712 INFO L87 Difference]: Start difference. First operand 182 states and 218 transitions. Second operand 38 states. [2019-11-23 20:32:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:27,056 INFO L93 Difference]: Finished difference Result 301 states and 376 transitions. [2019-11-23 20:32:27,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:32:27,057 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 179 [2019-11-23 20:32:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:27,058 INFO L225 Difference]: With dead ends: 301 [2019-11-23 20:32:27,058 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 20:32:27,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 179 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 20:32:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 20:32:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2019-11-23 20:32:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-11-23 20:32:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 224 transitions. [2019-11-23 20:32:27,065 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 224 transitions. Word has length 179 [2019-11-23 20:32:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:27,065 INFO L462 AbstractCegarLoop]: Abstraction has 187 states and 224 transitions. [2019-11-23 20:32:27,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:32:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 224 transitions. [2019-11-23 20:32:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-23 20:32:27,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:27,066 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:27,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:27,270 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash -143263819, now seen corresponding path program 33 times [2019-11-23 20:32:27,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:27,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513104508] [2019-11-23 20:32:27,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2019-11-23 20:32:27,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513104508] [2019-11-23 20:32:27,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90725728] [2019-11-23 20:32:27,863 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 20:32:39,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-11-23 20:32:39,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:39,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:32:39,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2019-11-23 20:32:39,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:39,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:32:39,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435915782] [2019-11-23 20:32:39,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:32:39,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:32:39,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:32:39,845 INFO L87 Difference]: Start difference. First operand 187 states and 224 transitions. Second operand 39 states. [2019-11-23 20:32:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:40,190 INFO L93 Difference]: Finished difference Result 309 states and 386 transitions. [2019-11-23 20:32:40,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:32:40,190 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 184 [2019-11-23 20:32:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:40,191 INFO L225 Difference]: With dead ends: 309 [2019-11-23 20:32:40,191 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:32:40,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 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 20:32:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:32:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2019-11-23 20:32:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:32:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2019-11-23 20:32:40,198 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 230 transitions. Word has length 184 [2019-11-23 20:32:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:40,198 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 230 transitions. [2019-11-23 20:32:40,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:32:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 230 transitions. [2019-11-23 20:32:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 20:32:40,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:40,200 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:40,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:40,408 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:40,408 INFO L82 PathProgramCache]: Analyzing trace with hash -754378674, now seen corresponding path program 34 times [2019-11-23 20:32:40,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:40,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583862307] [2019-11-23 20:32:40,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2019-11-23 20:32:41,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583862307] [2019-11-23 20:32:41,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937408824] [2019-11-23 20:32:41,246 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 20:32:41,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:32:41,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:41,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:32:41,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2019-11-23 20:32:41,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:41,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:32:41,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37052559] [2019-11-23 20:32:41,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:32:41,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:32:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:32:41,404 INFO L87 Difference]: Start difference. First operand 192 states and 230 transitions. Second operand 40 states. [2019-11-23 20:32:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:41,756 INFO L93 Difference]: Finished difference Result 317 states and 396 transitions. [2019-11-23 20:32:41,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:32:41,756 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 189 [2019-11-23 20:32:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:41,758 INFO L225 Difference]: With dead ends: 317 [2019-11-23 20:32:41,758 INFO L226 Difference]: Without dead ends: 200 [2019-11-23 20:32:41,759 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:32:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-23 20:32:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2019-11-23 20:32:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 20:32:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 236 transitions. [2019-11-23 20:32:41,766 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 236 transitions. Word has length 189 [2019-11-23 20:32:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:41,766 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 236 transitions. [2019-11-23 20:32:41,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:32:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 236 transitions. [2019-11-23 20:32:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-23 20:32:41,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:41,768 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:41,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:41,972 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:41,973 INFO L82 PathProgramCache]: Analyzing trace with hash -46765991, now seen corresponding path program 35 times [2019-11-23 20:32:41,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:41,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206449335] [2019-11-23 20:32:41,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2019-11-23 20:32:43,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206449335] [2019-11-23 20:32:43,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349510428] [2019-11-23 20:32:43,298 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 20:32:55,252 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2019-11-23 20:32:55,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:55,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:32:55,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2019-11-23 20:32:55,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:55,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:32:55,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988828636] [2019-11-23 20:32:55,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:32:55,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:55,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:32:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:32:55,316 INFO L87 Difference]: Start difference. First operand 197 states and 236 transitions. Second operand 41 states. [2019-11-23 20:32:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:55,652 INFO L93 Difference]: Finished difference Result 325 states and 406 transitions. [2019-11-23 20:32:55,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:32:55,652 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 194 [2019-11-23 20:32:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:55,653 INFO L225 Difference]: With dead ends: 325 [2019-11-23 20:32:55,653 INFO L226 Difference]: Without dead ends: 205 [2019-11-23 20:32:55,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:32:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-23 20:32:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2019-11-23 20:32:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-11-23 20:32:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 242 transitions. [2019-11-23 20:32:55,660 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 242 transitions. Word has length 194 [2019-11-23 20:32:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:55,660 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 242 transitions. [2019-11-23 20:32:55,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:32:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 242 transitions. [2019-11-23 20:32:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 20:32:55,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:55,661 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:55,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:55,872 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash 693936042, now seen corresponding path program 36 times [2019-11-23 20:32:55,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:55,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8100672] [2019-11-23 20:32:55,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2019-11-23 20:32:56,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8100672] [2019-11-23 20:32:56,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712983478] [2019-11-23 20:32:56,979 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 20:33:05,890 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2019-11-23 20:33:05,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:05,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:33:05,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2019-11-23 20:33:05,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:05,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:33:05,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604556814] [2019-11-23 20:33:05,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:33:05,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:05,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:33:05,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:33:05,945 INFO L87 Difference]: Start difference. First operand 202 states and 242 transitions. Second operand 42 states. [2019-11-23 20:33:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:06,343 INFO L93 Difference]: Finished difference Result 333 states and 416 transitions. [2019-11-23 20:33:06,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:33:06,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 199 [2019-11-23 20:33:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:06,345 INFO L225 Difference]: With dead ends: 333 [2019-11-23 20:33:06,345 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 20:33:06,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:33:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 20:33:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2019-11-23 20:33:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-11-23 20:33:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 248 transitions. [2019-11-23 20:33:06,351 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 248 transitions. Word has length 199 [2019-11-23 20:33:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:06,352 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 248 transitions. [2019-11-23 20:33:06,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:33:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 248 transitions. [2019-11-23 20:33:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-11-23 20:33:06,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:06,353 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:06,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:06,563 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1311406333, now seen corresponding path program 37 times [2019-11-23 20:33:06,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:06,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353190686] [2019-11-23 20:33:06,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 20:33:07,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353190686] [2019-11-23 20:33:07,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365401957] [2019-11-23 20:33:07,455 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 20:33:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:07,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:33:07,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 20:33:07,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:07,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:33:07,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361766012] [2019-11-23 20:33:07,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:33:07,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:33:07,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:33:07,634 INFO L87 Difference]: Start difference. First operand 207 states and 248 transitions. Second operand 43 states. [2019-11-23 20:33:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:08,038 INFO L93 Difference]: Finished difference Result 341 states and 426 transitions. [2019-11-23 20:33:08,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:33:08,038 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 204 [2019-11-23 20:33:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:08,039 INFO L225 Difference]: With dead ends: 341 [2019-11-23 20:33:08,040 INFO L226 Difference]: Without dead ends: 215 [2019-11-23 20:33:08,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:33:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-11-23 20:33:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2019-11-23 20:33:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-11-23 20:33:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 254 transitions. [2019-11-23 20:33:08,046 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 254 transitions. Word has length 204 [2019-11-23 20:33:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:08,047 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 254 transitions. [2019-11-23 20:33:08,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:33:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 254 transitions. [2019-11-23 20:33:08,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-23 20:33:08,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:08,048 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:08,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:08,252 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1510643962, now seen corresponding path program 38 times [2019-11-23 20:33:08,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:08,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589367397] [2019-11-23 20:33:08,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2019-11-23 20:33:09,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589367397] [2019-11-23 20:33:09,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888303006] [2019-11-23 20:33:09,219 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 20:33:09,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:09,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:09,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:33:09,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2019-11-23 20:33:09,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:09,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 20:33:09,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448104465] [2019-11-23 20:33:09,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:33:09,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:09,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:33:09,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:33:09,392 INFO L87 Difference]: Start difference. First operand 212 states and 254 transitions. Second operand 44 states. [2019-11-23 20:33:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:09,823 INFO L93 Difference]: Finished difference Result 349 states and 436 transitions. [2019-11-23 20:33:09,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:33:09,824 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 209 [2019-11-23 20:33:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:09,827 INFO L225 Difference]: With dead ends: 349 [2019-11-23 20:33:09,828 INFO L226 Difference]: Without dead ends: 220 [2019-11-23 20:33:09,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:33:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-11-23 20:33:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2019-11-23 20:33:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-11-23 20:33:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 260 transitions. [2019-11-23 20:33:09,834 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 260 transitions. Word has length 209 [2019-11-23 20:33:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:09,834 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 260 transitions. [2019-11-23 20:33:09,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:33:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 260 transitions. [2019-11-23 20:33:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-23 20:33:09,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:09,836 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:10,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:10,036 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash 960522657, now seen corresponding path program 39 times [2019-11-23 20:33:10,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:10,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348193260] [2019-11-23 20:33:10,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2019-11-23 20:33:10,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348193260] [2019-11-23 20:33:10,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002800286] [2019-11-23 20:33:10,924 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