/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:44:29,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:44:29,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:44:29,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:44:29,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:44:29,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:44:29,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:44:29,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:44:29,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:44:29,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:44:29,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:44:29,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:44:29,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:44:29,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:44:29,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:44:29,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:44:29,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:44:29,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:44:29,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:44:29,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:44:29,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:44:29,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:44:29,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:44:29,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:44:29,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:44:29,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:44:29,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:44:29,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:44:29,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:44:29,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 19:44:29,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:44:29,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:44:29,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:44:29,910 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 19:44:29,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:44:29,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:44:29,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:44:29,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:44:29,934 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:44:29,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:44:29,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:44:29,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:44:29,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:44:29,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:44:29,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:44:29,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:44:29,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:44:29,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:44:29,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:44:29,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:44:29,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:44:29,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:44:29,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:44:29,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:44:29,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:44:29,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:44:29,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:44:29,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:44:29,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:44:29,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:44:29,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:44:29,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:44:29,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:44:29,941 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=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:44:30,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:44:30,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:44:30,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:44:30,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:44:30,281 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:44:30,281 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-21 19:44:30,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/976ced63e/34cfa762b99b4f6b97cf2a56b2d2da68/FLAG06a3f4ba9 [2020-08-21 19:44:30,805 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:44:30,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-21 19:44:30,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/976ced63e/34cfa762b99b4f6b97cf2a56b2d2da68/FLAG06a3f4ba9 [2020-08-21 19:44:31,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/976ced63e/34cfa762b99b4f6b97cf2a56b2d2da68 [2020-08-21 19:44:31,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:44:31,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:44:31,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:44:31,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:44:31,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:44:31,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@768abed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31, skipping insertion in model container [2020-08-21 19:44:31,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:44:31,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:44:31,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:44:31,445 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:44:31,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:44:31,475 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:44:31,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31 WrapperNode [2020-08-21 19:44:31,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:44:31,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:44:31,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:44:31,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:44:31,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (1/1) ... [2020-08-21 19:44:31,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:44:31,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:44:31,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:44:31,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:44:31,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (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 19:44:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:44:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:44:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 19:44:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 19:44:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:44:31,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:44:31,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:44:31,663 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 19:44:31,663 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 19:44:31,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:44:31,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:44:31,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:44:31,884 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:44:31,885 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 19:44:31,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:44:31 BoogieIcfgContainer [2020-08-21 19:44:31,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:44:31,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:44:31,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:44:31,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:44:31,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:44:31" (1/3) ... [2020-08-21 19:44:31,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40782a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:44:31, skipping insertion in model container [2020-08-21 19:44:31,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:31" (2/3) ... [2020-08-21 19:44:31,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40782a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:44:31, skipping insertion in model container [2020-08-21 19:44:31,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:44:31" (3/3) ... [2020-08-21 19:44:31,921 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-08-21 19:44:31,937 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:44:31,945 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:44:31,975 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:44:31,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:44:31,998 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:44:31,998 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:44:31,998 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:44:31,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:44:31,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:44:31,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:44:31,999 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:44:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 19:44:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 19:44:32,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:32,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:32,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:32,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 19:44:32,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:32,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003749494] [2020-08-21 19:44:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,258 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 19:44:32,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003749494] [2020-08-21 19:44:32,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:32,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:44:32,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454192096] [2020-08-21 19:44:32,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:44:32,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:32,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:44:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:32,287 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 19:44:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:32,409 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 19:44:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:44:32,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 19:44:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:32,427 INFO L225 Difference]: With dead ends: 44 [2020-08-21 19:44:32,428 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 19:44:32,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 19:44:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 19:44:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 19:44:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 19:44:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 19:44:32,492 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 19:44:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:32,493 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 19:44:32,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:44:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 19:44:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 19:44:32,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:32,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:32,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:44:32,496 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 19:44:32,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:32,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246414651] [2020-08-21 19:44:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,623 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 19:44:32,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246414651] [2020-08-21 19:44:32,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:32,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:44:32,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441291941] [2020-08-21 19:44:32,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:44:32,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:32,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:44:32,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:32,633 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 19:44:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:32,744 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 19:44:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:44:32,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 19:44:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:32,747 INFO L225 Difference]: With dead ends: 36 [2020-08-21 19:44:32,748 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 19:44:32,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 19:44:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 19:44:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 19:44:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 19:44:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 19:44:32,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 19:44:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:32,768 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 19:44:32,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:44:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 19:44:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 19:44:32,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:32,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:32,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:44:32,771 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 19:44:32,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:32,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337848414] [2020-08-21 19:44:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:44:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 19:44:32,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337848414] [2020-08-21 19:44:32,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:32,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 19:44:32,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504475328] [2020-08-21 19:44:32,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:44:32,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:44:32,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:44:32,900 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 19:44:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:32,996 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 19:44:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:44:32,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 19:44:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:32,999 INFO L225 Difference]: With dead ends: 58 [2020-08-21 19:44:32,999 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 19:44:33,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:44:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 19:44:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 19:44:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 19:44:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 19:44:33,012 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 19:44:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:33,013 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 19:44:33,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:44:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 19:44:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:44:33,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:33,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:33,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:44:33,016 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 19:44:33,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:33,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138161518] [2020-08-21 19:44:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 19:44:33,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138161518] [2020-08-21 19:44:33,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:33,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 19:44:33,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972892315] [2020-08-21 19:44:33,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:44:33,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:44:33,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:44:33,227 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-21 19:44:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:33,455 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-21 19:44:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:44:33,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 19:44:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:33,462 INFO L225 Difference]: With dead ends: 54 [2020-08-21 19:44:33,462 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 19:44:33,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:44:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 19:44:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-21 19:44:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 19:44:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-21 19:44:33,477 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-21 19:44:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:33,477 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-21 19:44:33,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:44:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-21 19:44:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 19:44:33,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:33,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:33,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:44:33,480 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:33,481 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 19:44:33,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:33,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867420543] [2020-08-21 19:44:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:44:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:44:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 19:44:33,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867420543] [2020-08-21 19:44:33,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:33,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 19:44:33,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620798771] [2020-08-21 19:44:33,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:44:33,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:44:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:44:33,594 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-21 19:44:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:33,670 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-21 19:44:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:44:33,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-21 19:44:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:33,672 INFO L225 Difference]: With dead ends: 94 [2020-08-21 19:44:33,672 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 19:44:33,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:44:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 19:44:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 19:44:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 19:44:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-21 19:44:33,687 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-21 19:44:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:33,687 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-21 19:44:33,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:44:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-21 19:44:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 19:44:33,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:33,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:33,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:44:33,691 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 19:44:33,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:33,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676298113] [2020-08-21 19:44:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 19:44:33,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676298113] [2020-08-21 19:44:33,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:33,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 19:44:33,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143865512] [2020-08-21 19:44:33,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:44:33,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:33,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:44:33,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:44:33,834 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-21 19:44:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:33,951 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-21 19:44:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 19:44:33,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 19:44:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:33,954 INFO L225 Difference]: With dead ends: 103 [2020-08-21 19:44:33,954 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 19:44:33,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:44:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 19:44:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 19:44:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 19:44:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-21 19:44:33,970 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-21 19:44:33,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:33,971 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-21 19:44:33,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:44:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-21 19:44:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 19:44:33,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:33,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:33,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:44:33,980 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:33,981 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-21 19:44:33,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:33,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002182034] [2020-08-21 19:44:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 19:44:34,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002182034] [2020-08-21 19:44:34,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:34,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 19:44:34,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293535098] [2020-08-21 19:44:34,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:44:34,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:44:34,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:44:34,146 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-21 19:44:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:34,342 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-21 19:44:34,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:44:34,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-21 19:44:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:34,345 INFO L225 Difference]: With dead ends: 86 [2020-08-21 19:44:34,345 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 19:44:34,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:44:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 19:44:34,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 19:44:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 19:44:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-21 19:44:34,364 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-21 19:44:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:34,365 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-21 19:44:34,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:44:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-21 19:44:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 19:44:34,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:34,369 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:34,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:44:34,369 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-21 19:44:34,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:34,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405717413] [2020-08-21 19:44:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 19:44:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 19:44:34,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405717413] [2020-08-21 19:44:34,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:34,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 19:44:34,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67910948] [2020-08-21 19:44:34,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:44:34,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:44:34,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:44:34,530 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-21 19:44:34,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:34,650 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-21 19:44:34,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:44:34,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-21 19:44:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:34,653 INFO L225 Difference]: With dead ends: 167 [2020-08-21 19:44:34,653 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 19:44:34,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:44:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 19:44:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-21 19:44:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 19:44:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-21 19:44:34,673 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-21 19:44:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:34,673 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-21 19:44:34,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:44:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-21 19:44:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 19:44:34,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:34,676 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:34,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:44:34,676 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-21 19:44:34,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:34,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018208180] [2020-08-21 19:44:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 19:44:34,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018208180] [2020-08-21 19:44:34,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:34,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:44:34,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926949924] [2020-08-21 19:44:34,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:44:34,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:44:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:44:34,834 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-21 19:44:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:35,049 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-21 19:44:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 19:44:35,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-21 19:44:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:35,052 INFO L225 Difference]: With dead ends: 188 [2020-08-21 19:44:35,052 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 19:44:35,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:44:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 19:44:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-21 19:44:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 19:44:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-21 19:44:35,070 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-21 19:44:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:35,070 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-21 19:44:35,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:44:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-21 19:44:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 19:44:35,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:35,073 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:35,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:44:35,073 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-21 19:44:35,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:35,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175052259] [2020-08-21 19:44:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-21 19:44:35,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175052259] [2020-08-21 19:44:35,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:35,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 19:44:35,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040740145] [2020-08-21 19:44:35,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 19:44:35,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 19:44:35,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:44:35,316 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-21 19:44:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:35,710 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-21 19:44:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 19:44:35,711 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-21 19:44:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:35,712 INFO L225 Difference]: With dead ends: 199 [2020-08-21 19:44:35,713 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 19:44:35,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-21 19:44:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 19:44:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-21 19:44:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 19:44:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-21 19:44:35,723 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-21 19:44:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:35,724 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-21 19:44:35,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 19:44:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-21 19:44:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 19:44:35,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:35,726 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:35,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:44:35,726 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:35,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:35,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-21 19:44:35,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:35,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030141564] [2020-08-21 19:44:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 19:44:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-21 19:44:35,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030141564] [2020-08-21 19:44:35,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:35,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:44:35,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819891416] [2020-08-21 19:44:35,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:44:35,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:44:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:44:35,955 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-21 19:44:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:36,147 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-21 19:44:36,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:44:36,148 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-21 19:44:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:36,150 INFO L225 Difference]: With dead ends: 142 [2020-08-21 19:44:36,150 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 19:44:36,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:44:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 19:44:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 19:44:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 19:44:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-21 19:44:36,169 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-21 19:44:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:36,170 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-21 19:44:36,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:44:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-21 19:44:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-21 19:44:36,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:36,175 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:36,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:44:36,175 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:36,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-21 19:44:36,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:36,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126666181] [2020-08-21 19:44:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 19:44:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 19:44:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 19:44:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-08-21 19:44:36,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126666181] [2020-08-21 19:44:36,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:36,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 19:44:36,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489674051] [2020-08-21 19:44:36,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 19:44:36,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:36,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 19:44:36,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-21 19:44:36,768 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states. [2020-08-21 19:44:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:37,313 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2020-08-21 19:44:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 19:44:37,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192 [2020-08-21 19:44:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:37,316 INFO L225 Difference]: With dead ends: 184 [2020-08-21 19:44:37,316 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 19:44:37,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-08-21 19:44:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 19:44:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-21 19:44:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 19:44:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-21 19:44:37,327 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192 [2020-08-21 19:44:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:37,328 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-21 19:44:37,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 19:44:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-21 19:44:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 19:44:37,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:37,330 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:37,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 19:44:37,331 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:37,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times [2020-08-21 19:44:37,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:37,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704660130] [2020-08-21 19:44:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 19:44:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 19:44:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-08-21 19:44:37,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704660130] [2020-08-21 19:44:37,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:37,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:44:37,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641425877] [2020-08-21 19:44:37,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:44:37,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:44:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:44:37,614 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2020-08-21 19:44:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:37,905 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions. [2020-08-21 19:44:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 19:44:37,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-21 19:44:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:37,908 INFO L225 Difference]: With dead ends: 188 [2020-08-21 19:44:37,908 INFO L226 Difference]: Without dead ends: 101 [2020-08-21 19:44:37,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-21 19:44:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-21 19:44:37,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-08-21 19:44:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 19:44:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-21 19:44:37,918 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136 [2020-08-21 19:44:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:37,919 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-21 19:44:37,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:44:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-21 19:44:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-21 19:44:37,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:37,922 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:37,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 19:44:37,923 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-08-21 19:44:37,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:37,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477037638] [2020-08-21 19:44:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:37,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 19:44:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 19:44:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-08-21 19:44:38,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477037638] [2020-08-21 19:44:38,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:38,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 19:44:38,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928364134] [2020-08-21 19:44:38,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 19:44:38,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 19:44:38,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:44:38,324 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states. [2020-08-21 19:44:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:38,843 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions. [2020-08-21 19:44:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 19:44:38,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-08-21 19:44:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:38,845 INFO L225 Difference]: With dead ends: 217 [2020-08-21 19:44:38,845 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 19:44:38,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-21 19:44:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 19:44:38,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-08-21 19:44:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 19:44:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-08-21 19:44:38,855 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177 [2020-08-21 19:44:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:38,856 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-08-21 19:44:38,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 19:44:38,856 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-08-21 19:44:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 19:44:38,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:38,859 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:38,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 19:44:38,859 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2020-08-21 19:44:38,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:38,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464279465] [2020-08-21 19:44:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:38,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:44:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 19:44:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 19:44:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:44:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:44:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:44:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-08-21 19:44:39,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464279465] [2020-08-21 19:44:39,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:44:39,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 19:44:39,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541865564] [2020-08-21 19:44:39,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 19:44:39,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:39,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 19:44:39,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:44:39,213 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states. [2020-08-21 19:44:39,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:39,650 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2020-08-21 19:44:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 19:44:39,651 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-21 19:44:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:39,653 INFO L225 Difference]: With dead ends: 211 [2020-08-21 19:44:39,653 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 19:44:39,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-21 19:44:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 19:44:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-08-21 19:44:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 19:44:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2020-08-21 19:44:39,668 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150 [2020-08-21 19:44:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:39,670 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2020-08-21 19:44:39,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 19:44:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2020-08-21 19:44:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-21 19:44:39,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:39,672 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:39,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 19:44:39,673 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-08-21 19:44:39,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:39,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30107213] [2020-08-21 19:44:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:44:39,700 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:44:39,702 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:44:39,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 19:44:39,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:44:39 BoogieIcfgContainer [2020-08-21 19:44:39,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:44:39,752 INFO L168 Benchmark]: Toolchain (without parser) took 8554.61 ms. Allocated memory was 146.8 MB in the beginning and 340.8 MB in the end (delta: 194.0 MB). Free memory was 102.8 MB in the beginning and 161.6 MB in the end (delta: -58.8 MB). Peak memory consumption was 135.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:39,752 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:44:39,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.43 ms. Allocated memory is still 146.8 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:39,766 INFO L168 Benchmark]: Boogie Preprocessor took 114.38 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 93.0 MB in the beginning and 181.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:39,767 INFO L168 Benchmark]: RCFGBuilder took 299.24 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 167.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:39,767 INFO L168 Benchmark]: TraceAbstraction took 7857.11 ms. Allocated memory was 202.4 MB in the beginning and 340.8 MB in the end (delta: 138.4 MB). Free memory was 167.1 MB in the beginning and 161.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 143.9 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:39,770 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.43 ms. Allocated memory is still 146.8 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.38 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 93.0 MB in the beginning and 181.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.24 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 167.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7857.11 ms. Allocated memory was 202.4 MB in the beginning and 340.8 MB in the end (delta: 138.4 MB). Free memory was 167.1 MB in the beginning and 161.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 143.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 8 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.7s, OverallIterations: 16, TraceHistogramMax: 17, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 472 SDslu, 2192 SDs, 0 SdLazy, 2632 SolverSat, 332 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 77 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 1333 NumberOfCodeBlocks, 1333 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1141 ConstructedInterpolants, 0 QuantifiedInterpolants, 236129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 2308/3324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...