java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:57:33,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:57:33,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:57:33,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:57:33,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:57:33,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:57:33,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:57:33,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:57:33,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:57:33,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:57:33,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:57:33,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:57:33,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:57:33,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:57:33,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:57:33,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:57:33,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:57:33,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:57:33,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:57:33,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:57:33,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:57:33,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:57:33,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:57:33,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:57:33,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:57:33,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:57:33,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:57:33,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:57:33,843 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 [2019-09-20 12:57:33,857 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:57:33,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:57:33,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:57:33,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:57:33,859 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:57:33,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:57:33,860 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:57:33,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:57:33,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:57:33,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:57:33,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:57:33,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:57:33,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:57:33,861 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:57:33,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:57:33,862 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:57:33,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:57:33,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:57:33,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:57:33,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:57:33,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:57:33,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:33,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:57:33,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:57:33,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:57:33,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:57:33,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:57:33,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:57:33,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:57:33,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:57:33,911 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:57:33,915 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:57:33,916 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:57:33,916 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:57:33,917 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2019-09-20 12:57:33,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032301a39/1356541a1a024d4d88ffaa5646750778/FLAG82b21bb9d [2019-09-20 12:57:34,442 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:57:34,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2019-09-20 12:57:34,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032301a39/1356541a1a024d4d88ffaa5646750778/FLAG82b21bb9d [2019-09-20 12:57:34,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032301a39/1356541a1a024d4d88ffaa5646750778 [2019-09-20 12:57:34,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:57:34,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:57:34,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:34,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:57:34,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:57:34,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:34" (1/1) ... [2019-09-20 12:57:34,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4676458d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:34, skipping insertion in model container [2019-09-20 12:57:34,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:34" (1/1) ... [2019-09-20 12:57:34,888 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:57:34,901 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:57:35,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:35,088 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:57:35,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:35,113 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:57:35,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35 WrapperNode [2019-09-20 12:57:35,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:35,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:57:35,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:57:35,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:57:35,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (1/1) ... [2019-09-20 12:57:35,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (1/1) ... [2019-09-20 12:57:35,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (1/1) ... [2019-09-20 12:57:35,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (1/1) ... [2019-09-20 12:57:35,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (1/1) ... [2019-09-20 12:57:35,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (1/1) ... [2019-09-20 12:57:35,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (1/1) ... [2019-09-20 12:57:35,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:57:35,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:57:35,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:57:35,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:57:35,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (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 [2019-09-20 12:57:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:57:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:57:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:57:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:57:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:57:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:57:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-20 12:57:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:57:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:57:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:57:35,460 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:57:35,463 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 12:57:35,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:35 BoogieIcfgContainer [2019-09-20 12:57:35,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:57:35,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:57:35,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:57:35,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:57:35,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:57:34" (1/3) ... [2019-09-20 12:57:35,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b16cc26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:35, skipping insertion in model container [2019-09-20 12:57:35,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:35" (2/3) ... [2019-09-20 12:57:35,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b16cc26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:35, skipping insertion in model container [2019-09-20 12:57:35,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:35" (3/3) ... [2019-09-20 12:57:35,481 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-09-20 12:57:35,490 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:57:35,504 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:57:35,537 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:57:35,579 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:57:35,581 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:57:35,581 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:57:35,590 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:57:35,590 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:57:35,590 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:57:35,590 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:57:35,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:57:35,591 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:57:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-20 12:57:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:57:35,619 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:35,620 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:35,622 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2019-09-20 12:57:35,631 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:35,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:35,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:35,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:35,753 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:35,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:57:35,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:57:35,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:57:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:57:35,770 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-20 12:57:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:35,792 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-09-20 12:57:35,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:57:35,793 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 12:57:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:35,800 INFO L225 Difference]: With dead ends: 31 [2019-09-20 12:57:35,800 INFO L226 Difference]: Without dead ends: 14 [2019-09-20 12:57:35,804 INFO L636 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 [2019-09-20 12:57:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-20 12:57:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-20 12:57:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-20 12:57:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-20 12:57:35,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-20 12:57:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:35,844 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-20 12:57:35,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:57:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-20 12:57:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:57:35,845 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:35,845 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:35,846 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2019-09-20 12:57:35,846 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:35,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:35,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:35,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:35,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:35,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:57:35,989 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:57:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:57:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:57:35,990 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-09-20 12:57:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:36,040 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-09-20 12:57:36,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:57:36,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-20 12:57:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:36,041 INFO L225 Difference]: With dead ends: 23 [2019-09-20 12:57:36,042 INFO L226 Difference]: Without dead ends: 18 [2019-09-20 12:57:36,043 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:57:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-20 12:57:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-20 12:57:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-20 12:57:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-09-20 12:57:36,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2019-09-20 12:57:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:36,050 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-09-20 12:57:36,050 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:57:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-09-20 12:57:36,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 12:57:36,051 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:36,051 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:36,051 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:36,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2019-09-20 12:57:36,052 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:36,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:36,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:36,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:36,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:36,316 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:36,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:36,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:57:36,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:36,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:36,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:36,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-20 12:57:36,587 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-20 12:57:36,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-20 12:57:36,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2019-09-20 12:57:36,588 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2019-09-20 12:57:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:36,914 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-09-20 12:57:36,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-20 12:57:36,915 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-09-20 12:57:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:36,919 INFO L225 Difference]: With dead ends: 40 [2019-09-20 12:57:36,919 INFO L226 Difference]: Without dead ends: 34 [2019-09-20 12:57:36,920 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-09-20 12:57:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-20 12:57:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2019-09-20 12:57:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 12:57:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-20 12:57:36,936 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2019-09-20 12:57:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:36,936 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-20 12:57:36,937 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-20 12:57:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-20 12:57:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 12:57:36,940 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:36,941 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:36,942 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:36,943 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2019-09-20 12:57:36,943 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:36,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:36,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:36,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 12:57:36,986 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:36,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:57:36,987 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:57:36,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:57:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:36,988 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-09-20 12:57:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,006 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2019-09-20 12:57:37,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:57:37,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-09-20 12:57:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,007 INFO L225 Difference]: With dead ends: 36 [2019-09-20 12:57:37,007 INFO L226 Difference]: Without dead ends: 23 [2019-09-20 12:57:37,008 INFO L636 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 [2019-09-20 12:57:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-20 12:57:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-20 12:57:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-20 12:57:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-20 12:57:37,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2019-09-20 12:57:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,013 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-20 12:57:37,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:57:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-20 12:57:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 12:57:37,014 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,014 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,015 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2019-09-20 12:57:37,015 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:37,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:37,058 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:37,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:37,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:57:37,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:37,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 12:57:37,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:37,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-20 12:57:37,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 12:57:37,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 12:57:37,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:57:37,135 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-09-20 12:57:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,169 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-09-20 12:57:37,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:57:37,170 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-09-20 12:57:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,171 INFO L225 Difference]: With dead ends: 32 [2019-09-20 12:57:37,171 INFO L226 Difference]: Without dead ends: 23 [2019-09-20 12:57:37,171 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:57:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-20 12:57:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-20 12:57:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-20 12:57:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-09-20 12:57:37,176 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2019-09-20 12:57:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,176 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-09-20 12:57:37,176 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 12:57:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-09-20 12:57:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 12:57:37,177 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,178 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,178 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2019-09-20 12:57:37,178 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:37,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:37,234 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:37,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:57:37,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-20 12:57:37,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:37,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-20 12:57:37,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:37,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-20 12:57:37,354 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-20 12:57:37,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-20 12:57:37,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-09-20 12:57:37,355 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-09-20 12:57:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,420 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-09-20 12:57:37,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:57:37,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-09-20 12:57:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,422 INFO L225 Difference]: With dead ends: 34 [2019-09-20 12:57:37,422 INFO L226 Difference]: Without dead ends: 25 [2019-09-20 12:57:37,423 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-09-20 12:57:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-20 12:57:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-20 12:57:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-20 12:57:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-20 12:57:37,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2019-09-20 12:57:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,428 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-20 12:57:37,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-20 12:57:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-20 12:57:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 12:57:37,429 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,429 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,430 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,430 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2019-09-20 12:57:37,430 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:37,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 12:57:37,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:37,686 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:37,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:37,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:57:37,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:37,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:57:37,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:37,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:37,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2019-09-20 12:57:37,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-20 12:57:37,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-20 12:57:37,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-09-20 12:57:37,982 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 21 states. [2019-09-20 12:57:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:38,490 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-20 12:57:38,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-20 12:57:38,492 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2019-09-20 12:57:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:38,492 INFO L225 Difference]: With dead ends: 42 [2019-09-20 12:57:38,493 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 12:57:38,494 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2019-09-20 12:57:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 12:57:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2019-09-20 12:57:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 12:57:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-09-20 12:57:38,500 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2019-09-20 12:57:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:38,500 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-09-20 12:57:38,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-20 12:57:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-09-20 12:57:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:57:38,501 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:38,502 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:38,502 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2019-09-20 12:57:38,502 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:38,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:38,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:38,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:38,574 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:38,597 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 12:57:38,616 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:57:38,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:38,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 12:57:38,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:38,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-20 12:57:38,708 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-20 12:57:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-20 12:57:38,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-09-20 12:57:38,709 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2019-09-20 12:57:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:38,781 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-20 12:57:38,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 12:57:38,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-09-20 12:57:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:38,783 INFO L225 Difference]: With dead ends: 42 [2019-09-20 12:57:38,783 INFO L226 Difference]: Without dead ends: 33 [2019-09-20 12:57:38,784 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-09-20 12:57:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-20 12:57:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-20 12:57:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-20 12:57:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-09-20 12:57:38,793 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2019-09-20 12:57:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:38,794 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-09-20 12:57:38,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-20 12:57:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-09-20 12:57:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-20 12:57:38,796 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:38,796 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:38,796 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2019-09-20 12:57:38,797 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:38,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:38,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:38,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:38,898 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:38,916 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-20 12:57:38,931 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-20 12:57:38,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:38,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-20 12:57:38,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:57:39,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:39,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-09-20 12:57:39,067 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-20 12:57:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-20 12:57:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-09-20 12:57:39,068 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 20 states. [2019-09-20 12:57:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:39,152 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-09-20 12:57:39,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-20 12:57:39,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2019-09-20 12:57:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:39,153 INFO L225 Difference]: With dead ends: 47 [2019-09-20 12:57:39,154 INFO L226 Difference]: Without dead ends: 38 [2019-09-20 12:57:39,155 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-09-20 12:57:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-20 12:57:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2019-09-20 12:57:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-20 12:57:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-09-20 12:57:39,161 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2019-09-20 12:57:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:39,161 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-09-20 12:57:39,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-20 12:57:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-09-20 12:57:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 12:57:39,174 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:39,174 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:39,175 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:39,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2019-09-20 12:57:39,175 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:39,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:39,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:39,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:39,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 12:57:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 12:57:39,285 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-20 12:57:39,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 12:57:39 BoogieIcfgContainer [2019-09-20 12:57:39,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 12:57:39,322 INFO L168 Benchmark]: Toolchain (without parser) took 4449.29 ms. Allocated memory was 131.6 MB in the beginning and 266.3 MB in the end (delta: 134.7 MB). Free memory was 87.8 MB in the beginning and 233.3 MB in the end (delta: -145.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 12:57:39,323 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 131.6 MB. Free memory was 105.9 MB in the beginning and 105.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 12:57:39,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.71 ms. Allocated memory is still 131.6 MB. Free memory was 87.6 MB in the beginning and 78.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:39,325 INFO L168 Benchmark]: Boogie Preprocessor took 106.42 ms. Allocated memory was 131.6 MB in the beginning and 198.7 MB in the end (delta: 67.1 MB). Free memory was 78.2 MB in the beginning and 175.5 MB in the end (delta: -97.3 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:39,326 INFO L168 Benchmark]: RCFGBuilder took 243.48 ms. Allocated memory is still 198.7 MB. Free memory was 175.5 MB in the beginning and 163.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:39,327 INFO L168 Benchmark]: TraceAbstraction took 3847.20 ms. Allocated memory was 198.7 MB in the beginning and 266.3 MB in the end (delta: 67.6 MB). Free memory was 163.0 MB in the beginning and 233.3 MB in the end (delta: -70.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 12:57:39,331 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 131.6 MB. Free memory was 105.9 MB in the beginning and 105.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.71 ms. Allocated memory is still 131.6 MB. Free memory was 87.6 MB in the beginning and 78.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.42 ms. Allocated memory was 131.6 MB in the beginning and 198.7 MB in the end (delta: 67.1 MB). Free memory was 78.2 MB in the beginning and 175.5 MB in the end (delta: -97.3 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 243.48 ms. Allocated memory is still 198.7 MB. Free memory was 175.5 MB in the beginning and 163.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3847.20 ms. Allocated memory was 198.7 MB in the beginning and 266.3 MB in the end (delta: 67.6 MB). Free memory was 163.0 MB in the beginning and 233.3 MB in the end (delta: -70.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=6, n=0] [L13] COND TRUE i<=n VAL [i=1, j=10, n=0, n=6] [L14] COND TRUE i