/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:41:08,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:41:08,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:41:08,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:41:08,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:41:08,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:41:08,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:41:08,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:41:08,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:41:08,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:41:08,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:41:08,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:41:08,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:41:08,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:41:08,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:41:08,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:41:08,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:41:08,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:41:08,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:41:08,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:41:08,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:41:08,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:41:08,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:41:08,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:41:08,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:41:08,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:41:08,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:41:08,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:41:08,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:41:08,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:41:08,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:41:08,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:41:08,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:41:08,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:41:08,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:41:08,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:41:08,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:41:08,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:41:08,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:41:08,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:41:08,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:41:08,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:41:08,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:41:08,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:41:08,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:41:08,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:41:08,855 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:41:08,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:41:08,855 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:41:08,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:41:08,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:41:08,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:41:08,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:41:08,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:41:08,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:41:08,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:41:08,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:41:08,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:41:08,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:41:08,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:41:08,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:41:08,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:41:08,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:41:08,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:41:08,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:41:08,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:41:08,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:41:08,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:41:08,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:41:08,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:41:08,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:41:08,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:41:09,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:41:09,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:41:09,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:41:09,162 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:41:09,162 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:41:09,163 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 20:41:09,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b1764265/8b51333b5dee4a77a051684d69b65f89/FLAG2fbd768b8 [2020-08-21 20:41:09,652 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:41:09,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 20:41:09,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b1764265/8b51333b5dee4a77a051684d69b65f89/FLAG2fbd768b8 [2020-08-21 20:41:10,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b1764265/8b51333b5dee4a77a051684d69b65f89 [2020-08-21 20:41:10,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:41:10,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:41:10,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:41:10,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:41:10,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:41:10,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f046123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10, skipping insertion in model container [2020-08-21 20:41:10,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:41:10,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:41:10,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:41:10,347 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:41:10,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:41:10,381 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:41:10,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10 WrapperNode [2020-08-21 20:41:10,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:41:10,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:41:10,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:41:10,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:41:10,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (1/1) ... [2020-08-21 20:41:10,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:41:10,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:41:10,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:41:10,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:41:10,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 20:41:10,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:41:10,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:41:10,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 20:41:10,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:41:10,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:41:10,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 20:41:10,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 20:41:10,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:41:10,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:41:10,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:41:10,797 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:41:10,797 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 20:41:10,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:41:10 BoogieIcfgContainer [2020-08-21 20:41:10,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:41:10,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:41:10,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:41:10,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:41:10,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:41:10" (1/3) ... [2020-08-21 20:41:10,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:41:10, skipping insertion in model container [2020-08-21 20:41:10,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:10" (2/3) ... [2020-08-21 20:41:10,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:41:10, skipping insertion in model container [2020-08-21 20:41:10,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:41:10" (3/3) ... [2020-08-21 20:41:10,810 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-21 20:41:10,821 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:41:10,829 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:41:10,845 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:41:10,878 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:41:10,878 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:41:10,879 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:41:10,879 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:41:10,879 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:41:10,879 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:41:10,880 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:41:10,880 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:41:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 20:41:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 20:41:10,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:10,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:10,913 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-21 20:41:10,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:10,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582864708] [2020-08-21 20:41:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:11,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582864708] [2020-08-21 20:41:11,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:41:11,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 20:41:11,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125201270] [2020-08-21 20:41:11,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 20:41:11,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 20:41:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 20:41:11,130 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-21 20:41:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:11,153 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-21 20:41:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 20:41:11,155 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 20:41:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:11,164 INFO L225 Difference]: With dead ends: 31 [2020-08-21 20:41:11,164 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 20:41:11,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 20:41:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 20:41:11,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 20:41:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 20:41:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-21 20:41:11,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-21 20:41:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:11,209 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-21 20:41:11,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 20:41:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-21 20:41:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 20:41:11,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:11,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:11,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:41:11,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-21 20:41:11,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:11,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724270235] [2020-08-21 20:41:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:11,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724270235] [2020-08-21 20:41:11,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:41:11,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:41:11,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112619030] [2020-08-21 20:41:11,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:41:11,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:11,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:41:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:41:11,313 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-21 20:41:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:11,364 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-21 20:41:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:41:11,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-21 20:41:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:11,366 INFO L225 Difference]: With dead ends: 23 [2020-08-21 20:41:11,366 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 20:41:11,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:41:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 20:41:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 20:41:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 20:41:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-21 20:41:11,374 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-21 20:41:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:11,374 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-21 20:41:11,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:41:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-21 20:41:11,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 20:41:11,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:11,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:11,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:41:11,376 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-21 20:41:11,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:11,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201791852] [2020-08-21 20:41:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:11,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201791852] [2020-08-21 20:41:11,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:11,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 20:41:11,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211333754] [2020-08-21 20:41:11,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:41:11,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:41:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:41:11,658 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-21 20:41:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:11,817 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 20:41:11,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:41:11,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-21 20:41:11,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:11,822 INFO L225 Difference]: With dead ends: 33 [2020-08-21 20:41:11,823 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 20:41:11,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:41:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 20:41:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-21 20:41:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 20:41:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 20:41:11,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-21 20:41:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:11,843 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 20:41:11,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:41:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 20:41:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 20:41:11,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:11,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:11,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:41:11,846 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:11,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:11,847 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-21 20:41:11,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:11,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635785432] [2020-08-21 20:41:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 20:41:11,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635785432] [2020-08-21 20:41:11,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:41:11,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:41:11,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285568387] [2020-08-21 20:41:11,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:41:11,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:41:11,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:41:11,891 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-21 20:41:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:11,912 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 20:41:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:41:11,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 20:41:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:11,914 INFO L225 Difference]: With dead ends: 32 [2020-08-21 20:41:11,914 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 20:41:11,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:41:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 20:41:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 20:41:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 20:41:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 20:41:11,921 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-21 20:41:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:11,921 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 20:41:11,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:41:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 20:41:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 20:41:11,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:11,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:11,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:41:11,923 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-21 20:41:11,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:11,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865301074] [2020-08-21 20:41:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:11,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865301074] [2020-08-21 20:41:11,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:11,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 20:41:11,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135249311] [2020-08-21 20:41:11,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:41:11,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:11,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:41:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:41:11,983 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-21 20:41:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:12,022 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 20:41:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:41:12,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 20:41:12,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:12,024 INFO L225 Difference]: With dead ends: 30 [2020-08-21 20:41:12,024 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 20:41:12,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:41:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 20:41:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 20:41:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 20:41:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-21 20:41:12,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-21 20:41:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:12,031 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-21 20:41:12,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:41:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-21 20:41:12,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 20:41:12,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:12,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:12,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:41:12,034 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-21 20:41:12,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:12,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148164712] [2020-08-21 20:41:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:12,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 20:41:12,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148164712] [2020-08-21 20:41:12,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:12,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:41:12,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239366414] [2020-08-21 20:41:12,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:41:12,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:12,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:41:12,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:41:12,284 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-21 20:41:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:12,469 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-21 20:41:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:41:12,469 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-21 20:41:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:12,470 INFO L225 Difference]: With dead ends: 31 [2020-08-21 20:41:12,471 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 20:41:12,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:41:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 20:41:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 20:41:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 20:41:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 20:41:12,486 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-21 20:41:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:12,486 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 20:41:12,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 20:41:12,487 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 20:41:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:41:12,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:12,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:12,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:41:12,492 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-21 20:41:12,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:12,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028663693] [2020-08-21 20:41:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:12,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:12,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028663693] [2020-08-21 20:41:12,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:12,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 20:41:12,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249883076] [2020-08-21 20:41:12,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:41:12,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:12,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:41:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:41:12,600 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-21 20:41:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:12,641 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-21 20:41:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 20:41:12,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 20:41:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:12,643 INFO L225 Difference]: With dead ends: 38 [2020-08-21 20:41:12,643 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 20:41:12,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:41:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 20:41:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-21 20:41:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 20:41:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-21 20:41:12,650 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-21 20:41:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:12,651 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-21 20:41:12,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:41:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-21 20:41:12,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 20:41:12,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:12,652 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:12,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:41:12,653 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:12,653 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-21 20:41:12,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:12,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161227913] [2020-08-21 20:41:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:12,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:12,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161227913] [2020-08-21 20:41:12,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:12,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 20:41:12,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704698640] [2020-08-21 20:41:12,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:41:12,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:41:12,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:41:12,765 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-21 20:41:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:12,859 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-21 20:41:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:41:12,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 20:41:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:12,862 INFO L225 Difference]: With dead ends: 42 [2020-08-21 20:41:12,863 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 20:41:12,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:41:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 20:41:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 20:41:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 20:41:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-21 20:41:12,882 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-21 20:41:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:12,883 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-21 20:41:12,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:41:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-21 20:41:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 20:41:12,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:12,884 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:12,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:41:12,885 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-21 20:41:12,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:12,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740621151] [2020-08-21 20:41:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:13,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:13,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740621151] [2020-08-21 20:41:13,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:41:13,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 20:41:13,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278511343] [2020-08-21 20:41:13,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:41:13,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:41:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:41:13,024 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-21 20:41:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:13,097 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-21 20:41:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 20:41:13,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 20:41:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:13,098 INFO L225 Difference]: With dead ends: 46 [2020-08-21 20:41:13,099 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 20:41:13,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:41:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 20:41:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-21 20:41:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 20:41:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 20:41:13,106 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-21 20:41:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:13,107 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 20:41:13,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:41:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 20:41:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 20:41:13,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:13,108 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:13,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:41:13,109 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-21 20:41:13,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:13,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365984341] [2020-08-21 20:41:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:41:13,143 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:41:13,143 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:41:13,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:41:13,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:41:13 BoogieIcfgContainer [2020-08-21 20:41:13,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:41:13,184 INFO L168 Benchmark]: Toolchain (without parser) took 3109.53 ms. Allocated memory was 138.4 MB in the beginning and 233.8 MB in the end (delta: 95.4 MB). Free memory was 101.3 MB in the beginning and 98.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 98.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:13,185 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 20:41:13,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.98 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:13,187 INFO L168 Benchmark]: Boogie Preprocessor took 143.89 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.6 MB in the beginning and 181.9 MB in the end (delta: -90.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:13,193 INFO L168 Benchmark]: RCFGBuilder took 274.20 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 168.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:13,194 INFO L168 Benchmark]: TraceAbstraction took 2378.01 ms. Allocated memory was 202.9 MB in the beginning and 233.8 MB in the end (delta: 30.9 MB). Free memory was 168.6 MB in the beginning and 98.0 MB in the end (delta: 70.6 MB). Peak memory consumption was 101.5 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:13,203 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.98 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.89 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.6 MB in the beginning and 181.9 MB in the end (delta: -90.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 274.20 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 168.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2378.01 ms. Allocated memory was 202.9 MB in the beginning and 233.8 MB in the end (delta: 30.9 MB). Free memory was 168.6 MB in the beginning and 98.0 MB in the end (delta: 70.6 MB). Peak memory consumption was 101.5 MB. 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 [L13] COND TRUE i<=n [L14] COND TRUE i