/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-crafted/zero_sum_const_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:16:52,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:16:52,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:16:52,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:16:52,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:16:52,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:16:52,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:16:52,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:16:52,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:16:52,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:16:52,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:16:52,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:16:52,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:16:52,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:16:52,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:16:52,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:16:52,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:16:52,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:16:52,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:16:52,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:16:52,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:16:52,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:16:52,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:16:52,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:16:52,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:16:52,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:16:52,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:16:52,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:16:52,701 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 20:16:52,722 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:16:52,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:16:52,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:16:52,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:16:52,725 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:16:52,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:16:52,725 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:16:52,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:16:52,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:16:52,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:16:52,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:16:52,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:16:52,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:16:52,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:16:52,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:16:52,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:16:52,728 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:16:52,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:16:52,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:16:52,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:16:52,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:16:52,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:16:52,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:16:52,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:16:52,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:16:52,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:16:52,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:16:52,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:16:52,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:16:52,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:16:53,012 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:16:53,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:16:53,028 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:16:53,029 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:16:53,029 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:16:53,030 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2019-11-23 20:16:53,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de569ff4c/f32b3de618b8456fb2d2b0f18ad0c459/FLAG8646d2b31 [2019-11-23 20:16:53,530 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:16:53,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2019-11-23 20:16:53,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de569ff4c/f32b3de618b8456fb2d2b0f18ad0c459/FLAG8646d2b31 [2019-11-23 20:16:53,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de569ff4c/f32b3de618b8456fb2d2b0f18ad0c459 [2019-11-23 20:16:53,906 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:16:53,907 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:16:53,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:16:53,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:16:53,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:16:53,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50a33006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53, skipping insertion in model container [2019-11-23 20:16:53,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:16:53,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:16:54,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:16:54,191 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:16:54,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:16:54,253 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:16:54,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54 WrapperNode [2019-11-23 20:16:54,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:16:54,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:16:54,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:16:54,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:16:54,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:16:54,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:16:54,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:16:54,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:16:54,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (1/1) ... [2019-11-23 20:16:54,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:16:54,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:16:54,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:16:54,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:16:54,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (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 20:16:54,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:16:54,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:16:54,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:16:54,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:16:54,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:16:54,854 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:16:54,854 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 20:16:54,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:16:54 BoogieIcfgContainer [2019-11-23 20:16:54,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:16:54,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:16:54,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:16:54,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:16:54,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:16:53" (1/3) ... [2019-11-23 20:16:54,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d98eade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:16:54, skipping insertion in model container [2019-11-23 20:16:54,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:54" (2/3) ... [2019-11-23 20:16:54,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d98eade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:16:54, skipping insertion in model container [2019-11-23 20:16:54,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:16:54" (3/3) ... [2019-11-23 20:16:54,867 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2019-11-23 20:16:54,878 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:16:54,886 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:16:54,899 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:16:54,921 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:16:54,921 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:16:54,921 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:16:54,921 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:16:54,922 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:16:54,922 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:16:54,922 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:16:54,922 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:16:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-11-23 20:16:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:16:54,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:54,943 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:54,943 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2019-11-23 20:16:54,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:54,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783299031] [2019-11-23 20:16:54,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:55,075 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 20:16:55,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783299031] [2019-11-23 20:16:55,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:55,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:16:55,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261722213] [2019-11-23 20:16:55,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:16:55,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:16:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:16:55,108 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2019-11-23 20:16:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:55,135 INFO L93 Difference]: Finished difference Result 81 states and 124 transitions. [2019-11-23 20:16:55,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:16:55,138 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2019-11-23 20:16:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:55,150 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:16:55,151 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:16:55,155 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 20:16:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:16:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 20:16:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:16:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 20:16:55,200 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2019-11-23 20:16:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:55,201 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 20:16:55,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:16:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 20:16:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:16:55,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:55,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:55,203 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2019-11-23 20:16:55,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:55,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208783984] [2019-11-23 20:16:55,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:55,366 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 20:16:55,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208783984] [2019-11-23 20:16:55,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:55,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:16:55,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107024914] [2019-11-23 20:16:55,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:16:55,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:55,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:16:55,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:55,371 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 4 states. [2019-11-23 20:16:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:55,480 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-23 20:16:55,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:16:55,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-23 20:16:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:55,483 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:16:55,483 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:16:55,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:16:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:16:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:16:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:16:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2019-11-23 20:16:55,508 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27 [2019-11-23 20:16:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:55,512 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2019-11-23 20:16:55,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:16:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2019-11-23 20:16:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:16:55,515 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:55,516 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:55,516 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash -829891778, now seen corresponding path program 1 times [2019-11-23 20:16:55,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:55,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657439957] [2019-11-23 20:16:55,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:16:55,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657439957] [2019-11-23 20:16:55,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:55,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:16:55,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126467570] [2019-11-23 20:16:55,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:16:55,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:55,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:16:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:16:55,610 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 3 states. [2019-11-23 20:16:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:55,754 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2019-11-23 20:16:55,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:16:55,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-23 20:16:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:55,757 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:16:55,757 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:16:55,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:16:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:16:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 20:16:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:16:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2019-11-23 20:16:55,779 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 29 [2019-11-23 20:16:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:55,779 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2019-11-23 20:16:55,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:16:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2019-11-23 20:16:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:16:55,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:55,784 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:55,784 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1139067424, now seen corresponding path program 1 times [2019-11-23 20:16:55,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:55,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027070359] [2019-11-23 20:16:55,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:16:55,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027070359] [2019-11-23 20:16:55,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:55,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:16:55,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585542310] [2019-11-23 20:16:55,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:16:55,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:55,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:16:55,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:55,891 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2019-11-23 20:16:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:56,083 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2019-11-23 20:16:56,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:16:56,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-23 20:16:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:56,085 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:16:56,085 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:16:56,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:16:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2019-11-23 20:16:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:16:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-23 20:16:56,094 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2019-11-23 20:16:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:56,094 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-23 20:16:56,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:16:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-23 20:16:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:16:56,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:56,096 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:56,096 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2019-11-23 20:16:56,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:56,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739485212] [2019-11-23 20:16:56,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:16:56,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739485212] [2019-11-23 20:16:56,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358897026] [2019-11-23 20:16:56,194 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 20:16:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:56,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:16:56,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:16:56,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:56,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:16:56,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653281691] [2019-11-23 20:16:56,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:16:56,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:56,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:16:56,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:16:56,319 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2019-11-23 20:16:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:56,469 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2019-11-23 20:16:56,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:16:56,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-23 20:16:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:56,470 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:16:56,470 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:16:56,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:16:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:16:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-23 20:16:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:16:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-23 20:16:56,481 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2019-11-23 20:16:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:56,482 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-23 20:16:56,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:16:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-23 20:16:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:16:56,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:56,486 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:56,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:56,688 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2019-11-23 20:16:56,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:56,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351569227] [2019-11-23 20:16:56,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:16:56,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351569227] [2019-11-23 20:16:56,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523910104] [2019-11-23 20:16:56,802 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 20:16:56,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:16:56,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:56,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:16:56,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:16:56,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:56,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:16:56,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746069434] [2019-11-23 20:16:56,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:16:56,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:16:56,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:16:56,919 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2019-11-23 20:16:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:57,160 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2019-11-23 20:16:57,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:16:57,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-23 20:16:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:57,162 INFO L225 Difference]: With dead ends: 123 [2019-11-23 20:16:57,163 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:16:57,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:16:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:16:57,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-11-23 20:16:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:16:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2019-11-23 20:16:57,185 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2019-11-23 20:16:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:57,187 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2019-11-23 20:16:57,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:16:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2019-11-23 20:16:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:16:57,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:57,196 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:57,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:57,400 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2019-11-23 20:16:57,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:57,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652028775] [2019-11-23 20:16:57,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:01,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652028775] [2019-11-23 20:17:01,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372474670] [2019-11-23 20:17:01,559 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 20:17:01,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:17:01,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:01,620 WARN L253 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 106 conjunts are in the unsatisfiable core [2019-11-23 20:17:01,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:13,622 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:13,623 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:17:13,624 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:17:13,636 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:13,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:13,641 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:17:13,641 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-11-23 20:17:13,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:14,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:14,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:14,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:14,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 57] total 98 [2019-11-23 20:17:14,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35350869] [2019-11-23 20:17:14,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-11-23 20:17:14,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:14,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-11-23 20:17:14,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=9199, Unknown=0, NotChecked=0, Total=9506 [2019-11-23 20:17:14,230 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 98 states.