/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:55:28,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:55:28,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:55:28,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:55:28,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:55:28,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:55:28,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:55:28,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:55:28,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:55:28,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:55:28,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:55:28,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:55:28,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:55:28,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:55:28,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:55:28,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:55:28,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:55:28,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:55:28,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:55:28,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:55:28,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:55:28,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:55:28,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:55:28,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:55:28,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:55:28,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:55:28,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:55:28,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:55:28,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:55:28,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:55:28,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:55:28,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:55:28,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:55:28,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:55:28,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:55:28,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:55:28,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:55:28,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:55:28,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:55:28,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:55:28,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:55:28,691 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 [2020-09-24 22:55:28,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:55:28,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:55:28,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:55:28,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:55:28,720 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:55:28,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:55:28,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:55:28,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:55:28,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:55:28,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:55:28,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:55:28,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:55:28,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:55:28,722 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:55:28,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:55:28,722 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:55:28,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:55:28,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:55:28,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:55:28,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:55:28,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:55:28,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:55:28,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:55:28,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:55:28,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:55:28,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:55:28,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:55:28,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:55:28,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:55:28,725 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:55:29,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:55:29,248 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:55:29,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:55:29,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:55:29,257 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:55:29,258 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-09-24 22:55:29,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/978f6766c/4d359b6b3390494392a193abdd4f4096/FLAGa2ee86dc4 [2020-09-24 22:55:29,866 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:55:29,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c11.c [2020-09-24 22:55:29,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/978f6766c/4d359b6b3390494392a193abdd4f4096/FLAGa2ee86dc4 [2020-09-24 22:55:30,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/978f6766c/4d359b6b3390494392a193abdd4f4096 [2020-09-24 22:55:30,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:55:30,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:55:30,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:30,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:55:30,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:55:30,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143143ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30, skipping insertion in model container [2020-09-24 22:55:30,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:55:30,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:55:30,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:30,467 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:55:30,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:30,501 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:55:30,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30 WrapperNode [2020-09-24 22:55:30,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:30,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:55:30,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:55:30,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:55:30,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (1/1) ... [2020-09-24 22:55:30,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:55:30,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:55:30,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:55:30,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:55:30,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (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 [2020-09-24 22:55:30,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:55:30,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:55:30,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 22:55:30,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:55:30,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:55:30,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 22:55:30,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 22:55:30,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:55:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:55:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:55:30,907 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:55:30,908 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 22:55:30,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:30 BoogieIcfgContainer [2020-09-24 22:55:30,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:55:30,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:55:30,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:55:30,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:55:30,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:55:30" (1/3) ... [2020-09-24 22:55:30,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac7d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:30, skipping insertion in model container [2020-09-24 22:55:30,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:30" (2/3) ... [2020-09-24 22:55:30,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac7d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:30, skipping insertion in model container [2020-09-24 22:55:30,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:30" (3/3) ... [2020-09-24 22:55:30,939 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-09-24 22:55:30,975 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:55:30,985 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:55:31,010 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:55:31,036 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:55:31,037 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:55:31,037 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:55:31,037 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:55:31,037 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:55:31,038 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:55:31,038 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:55:31,038 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:55:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-09-24 22:55:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 22:55:31,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:31,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:31,065 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1430370880, now seen corresponding path program 1 times [2020-09-24 22:55:31,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:31,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769622231] [2020-09-24 22:55:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:31,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 22:55:31,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:31,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-24 22:55:31,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 22:55:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:31,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:55:31,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:31,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:31,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:31,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:31,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 22:55:31,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:31,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:31,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769622231] [2020-09-24 22:55:31,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:31,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 22:55:31,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924675218] [2020-09-24 22:55:31,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 22:55:31,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:31,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 22:55:31,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 22:55:31,359 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-09-24 22:55:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:31,391 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-09-24 22:55:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 22:55:31,394 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 22:55:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:31,406 INFO L225 Difference]: With dead ends: 40 [2020-09-24 22:55:31,406 INFO L226 Difference]: Without dead ends: 21 [2020-09-24 22:55:31,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 22:55:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-24 22:55:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-24 22:55:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 22:55:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-24 22:55:31,464 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2020-09-24 22:55:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:31,464 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-24 22:55:31,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 22:55:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-24 22:55:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-24 22:55:31,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:31,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:31,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:55:31,467 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1911322683, now seen corresponding path program 1 times [2020-09-24 22:55:31,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:31,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913631572] [2020-09-24 22:55:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:31,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:31,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 22:55:31,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:31,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 22:55:31,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:31,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:55:31,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:55:31,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 22:55:31,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:31,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:31,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:31,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:31,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 22:55:31,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:31,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:31,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913631572] [2020-09-24 22:55:31,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:31,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:55:31,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274746521] [2020-09-24 22:55:31,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:55:31,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:31,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:55:31,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:55:31,680 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-24 22:55:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:31,749 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-24 22:55:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:55:31,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-24 22:55:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:31,751 INFO L225 Difference]: With dead ends: 45 [2020-09-24 22:55:31,751 INFO L226 Difference]: Without dead ends: 27 [2020-09-24 22:55:31,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:55:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-24 22:55:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-09-24 22:55:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 22:55:31,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-24 22:55:31,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2020-09-24 22:55:31,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:31,760 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-24 22:55:31,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:55:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-24 22:55:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 22:55:31,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:31,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:31,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:55:31,762 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:31,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:31,763 INFO L82 PathProgramCache]: Analyzing trace with hash -4953541, now seen corresponding path program 1 times [2020-09-24 22:55:31,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:31,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788227126] [2020-09-24 22:55:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:31,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:31,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 22:55:31,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:31,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-24 22:55:31,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:55:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:55:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 22:55:31,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:32,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:32,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:32,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:32,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:32,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:32,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:32,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:32,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:32,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:32,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:32,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788227126] [2020-09-24 22:55:32,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:32,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 22:55:32,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041139028] [2020-09-24 22:55:32,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 22:55:32,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 22:55:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:55:32,099 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-24 22:55:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:32,205 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-09-24 22:55:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 22:55:32,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-24 22:55:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:32,207 INFO L225 Difference]: With dead ends: 52 [2020-09-24 22:55:32,207 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 22:55:32,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:55:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 22:55:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-09-24 22:55:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 22:55:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-24 22:55:32,215 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-09-24 22:55:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:32,216 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-24 22:55:32,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 22:55:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-24 22:55:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 22:55:32,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:32,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:32,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:55:32,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash 628881157, now seen corresponding path program 2 times [2020-09-24 22:55:32,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:32,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968465755] [2020-09-24 22:55:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:32,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:32,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 22:55:32,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:32,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-09-24 22:55:32,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:32,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:55:32,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:55:32,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 22:55:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:32,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:32,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:32,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:32,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:32,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:32,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:32,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:32,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968465755] [2020-09-24 22:55:32,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:32,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 22:55:32,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909196872] [2020-09-24 22:55:32,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 22:55:32,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 22:55:32,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 22:55:32,843 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2020-09-24 22:55:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:33,027 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-24 22:55:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 22:55:33,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-24 22:55:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:33,031 INFO L225 Difference]: With dead ends: 66 [2020-09-24 22:55:33,032 INFO L226 Difference]: Without dead ends: 41 [2020-09-24 22:55:33,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-24 22:55:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-24 22:55:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-24 22:55:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 22:55:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-24 22:55:33,046 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 27 [2020-09-24 22:55:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:33,046 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-24 22:55:33,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 22:55:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-24 22:55:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 22:55:33,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:33,054 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:33,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:55:33,055 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1577865979, now seen corresponding path program 3 times [2020-09-24 22:55:33,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:33,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257895578] [2020-09-24 22:55:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:33,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:33,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:33,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 22:55:33,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:33,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-09-24 22:55:33,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:33,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:55:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 22:55:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:33,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:33,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:33,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:33,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:33,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:33,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:33,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:33,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257895578] [2020-09-24 22:55:33,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:33,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 22:55:33,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008478217] [2020-09-24 22:55:33,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 22:55:33,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:33,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 22:55:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:55:33,595 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-09-24 22:55:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:33,849 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-09-24 22:55:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 22:55:33,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-09-24 22:55:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:33,851 INFO L225 Difference]: With dead ends: 80 [2020-09-24 22:55:33,851 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 22:55:33,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-24 22:55:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 22:55:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-24 22:55:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 22:55:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-24 22:55:33,859 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2020-09-24 22:55:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:33,859 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-24 22:55:33,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 22:55:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-24 22:55:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 22:55:33,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:33,861 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:33,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:55:33,862 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1087419973, now seen corresponding path program 4 times [2020-09-24 22:55:33,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:33,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691730688] [2020-09-24 22:55:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:33,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:34,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 22:55:34,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:34,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-09-24 22:55:34,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 22:55:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:55:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 22:55:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:34,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:34,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:34,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:34,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:34,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:34,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:34,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691730688] [2020-09-24 22:55:34,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:34,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 22:55:34,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879654059] [2020-09-24 22:55:34,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 22:55:34,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:34,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 22:55:34,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:55:34,507 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 13 states. [2020-09-24 22:55:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:34,836 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-09-24 22:55:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 22:55:34,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-09-24 22:55:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:34,838 INFO L225 Difference]: With dead ends: 62 [2020-09-24 22:55:34,838 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 22:55:34,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-09-24 22:55:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 22:55:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-24 22:55:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 22:55:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-09-24 22:55:34,846 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 41 [2020-09-24 22:55:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:34,846 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-09-24 22:55:34,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 22:55:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-09-24 22:55:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 22:55:34,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:34,847 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:34,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:55:34,848 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1795298373, now seen corresponding path program 5 times [2020-09-24 22:55:34,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:34,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161626264] [2020-09-24 22:55:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:34,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 22:55:35,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:35,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-09-24 22:55:35,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:35,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:55:35,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 22:55:35,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:35,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:35,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:55:35,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:35,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:35,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161626264] [2020-09-24 22:55:35,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:35,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 22:55:35,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436435357] [2020-09-24 22:55:35,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 22:55:35,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:35,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 22:55:35,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:55:35,470 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-09-24 22:55:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:35,733 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-24 22:55:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 22:55:35,734 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-24 22:55:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:35,735 INFO L225 Difference]: With dead ends: 79 [2020-09-24 22:55:35,735 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 22:55:35,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-24 22:55:35,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 22:55:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 22:55:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 22:55:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 22:55:35,737 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-09-24 22:55:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:35,737 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 22:55:35,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 22:55:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 22:55:35,738 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 22:55:35,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:55:35,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 22:55:35,847 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 22:55:35,847 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 22:55:35,847 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 22:55:35,848 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 22:55:35,848 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 22:55:35,848 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 22:55:35,848 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-09-24 22:55:35,848 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed. [2020-09-24 22:55:35,849 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2020-09-24 22:55:35,849 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-09-24 22:55:35,849 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-09-24 22:55:35,849 INFO L264 CegarLoopResult]: At program point L19-4(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-09-24 22:55:35,850 INFO L264 CegarLoopResult]: At program point L19-5(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-09-24 22:55:35,850 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-09-24 22:55:35,850 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-09-24 22:55:35,850 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-24 22:55:35,851 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-24 22:55:35,851 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-09-24 22:55:35,851 INFO L268 CegarLoopResult]: For program point L26-2(line 26) no Hoare annotation was computed. [2020-09-24 22:55:35,851 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-24 22:55:35,851 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 22:55:35,852 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 22:55:35,852 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-24 22:55:35,852 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-24 22:55:35,852 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 22:55:35,852 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-24 22:55:35,853 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-24 22:55:35,853 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-24 22:55:35,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:55:35 BoogieIcfgContainer [2020-09-24 22:55:35,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 22:55:35,880 INFO L168 Benchmark]: Toolchain (without parser) took 5679.59 ms. Allocated memory was 144.7 MB in the beginning and 287.8 MB in the end (delta: 143.1 MB). Free memory was 101.3 MB in the beginning and 246.9 MB in the end (delta: -145.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 22:55:35,881 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 119.4 MB in the beginning and 119.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 22:55:35,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.71 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 91.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:35,883 INFO L168 Benchmark]: Boogie Preprocessor took 119.48 ms. Allocated memory was 144.7 MB in the beginning and 199.8 MB in the end (delta: 55.1 MB). Free memory was 91.2 MB in the beginning and 177.6 MB in the end (delta: -86.4 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:35,884 INFO L168 Benchmark]: RCFGBuilder took 292.15 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 165.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:35,885 INFO L168 Benchmark]: TraceAbstraction took 4949.00 ms. Allocated memory was 199.8 MB in the beginning and 287.8 MB in the end (delta: 88.1 MB). Free memory was 165.1 MB in the beginning and 246.9 MB in the end (delta: -81.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:35,889 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 119.4 MB in the beginning and 119.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.71 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 91.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.48 ms. Allocated memory was 144.7 MB in the beginning and 199.8 MB in the end (delta: 55.1 MB). Free memory was 91.2 MB in the beginning and 177.6 MB in the end (delta: -86.4 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 292.15 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 165.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4949.00 ms. Allocated memory was 199.8 MB in the beginning and 287.8 MB in the end (delta: 88.1 MB). Free memory was 165.1 MB in the beginning and 246.9 MB in the end (delta: -81.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 < len / 4294967296 + 1 && len <= 4 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 154 SDtfs, 92 SDslu, 770 SDs, 0 SdLazy, 619 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 27 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 112 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 188 ConstructedInterpolants, 0 QuantifiedInterpolants, 34438 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 21/155 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 correct! Received shutdown request...