/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:26:17,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:26:17,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:26:17,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:26:17,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:26:17,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:26:17,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:26:17,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:26:17,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:26:17,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:26:17,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:26:17,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:26:17,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:26:17,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:26:17,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:26:17,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:26:17,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:26:17,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:26:17,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:26:17,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:26:17,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:26:17,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:26:17,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:26:17,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:26:17,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:26:17,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:26:17,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:26:17,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:26:17,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:26:17,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:26:17,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:26:17,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:26:17,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:26:17,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:26:17,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:26:17,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:26:17,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:26:17,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:26:17,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:26:17,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:26:17,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:26:17,891 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 [2020-10-12 16:26:17,929 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:26:17,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:26:17,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:26:17,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:26:17,933 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:26:17,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:26:17,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:26:17,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:26:17,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:26:17,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:26:17,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:26:17,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:26:17,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:26:17,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:26:17,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:26:17,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:26:17,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:26:17,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:26:17,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:26:17,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:26:17,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:26:17,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:26:17,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:26:17,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:26:17,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:26:17,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:26:17,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:26:17,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:26:17,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:26:17,939 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:26:18,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:26:18,273 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:26:18,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:26:18,278 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:26:18,279 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:26:18,280 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2020-10-12 16:26:18,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b629d8b57/90c9446c91bb441f9f1ae037c15d2071/FLAGb46cf79b8 [2020-10-12 16:26:18,851 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:26:18,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-1.i [2020-10-12 16:26:18,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b629d8b57/90c9446c91bb441f9f1ae037c15d2071/FLAGb46cf79b8 [2020-10-12 16:26:19,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b629d8b57/90c9446c91bb441f9f1ae037c15d2071 [2020-10-12 16:26:19,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:26:19,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:26:19,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:26:19,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:26:19,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:26:19,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19, skipping insertion in model container [2020-10-12 16:26:19,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:26:19,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:26:19,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:26:19,481 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:26:19,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:26:19,629 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:26:19,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19 WrapperNode [2020-10-12 16:26:19,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:26:19,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:26:19,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:26:19,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:26:19,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (1/1) ... [2020-10-12 16:26:19,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:26:19,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:26:19,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:26:19,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:26:19,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (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 [2020-10-12 16:26:19,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:26:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:26:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:26:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:26:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:26:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:26:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:26:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:26:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:26:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 16:26:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:26:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 16:26:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-12 16:26:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 16:26:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 16:26:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 16:26:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:26:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:26:20,104 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:26:20,104 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 16:26:20,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:26:20 BoogieIcfgContainer [2020-10-12 16:26:20,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:26:20,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:26:20,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:26:20,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:26:20,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:26:19" (1/3) ... [2020-10-12 16:26:20,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a7322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:26:20, skipping insertion in model container [2020-10-12 16:26:20,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:19" (2/3) ... [2020-10-12 16:26:20,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a7322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:26:20, skipping insertion in model container [2020-10-12 16:26:20,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:26:20" (3/3) ... [2020-10-12 16:26:20,120 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2020-10-12 16:26:20,134 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:26:20,144 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:26:20,159 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:26:20,189 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:26:20,189 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:26:20,190 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:26:20,190 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:26:20,190 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:26:20,191 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:26:20,191 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:26:20,191 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:26:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 16:26:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:26:20,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:20,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:20,224 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:20,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1745945109, now seen corresponding path program 1 times [2020-10-12 16:26:20,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:20,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744068001] [2020-10-12 16:26:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:20,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:26:20,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:26:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-12 16:26:20,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:26:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 16:26:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:26:20,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:26:21,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:21,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:21,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:21,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:21,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:21,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 16:26:21,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:21,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:21,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:21,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:21,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:26:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:26:21,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744068001] [2020-10-12 16:26:21,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:26:21,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:26:21,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311395442] [2020-10-12 16:26:21,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:26:21,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:26:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:26:21,318 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 7 states. [2020-10-12 16:26:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:21,697 INFO L93 Difference]: Finished difference Result 96 states and 144 transitions. [2020-10-12 16:26:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:26:21,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-12 16:26:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:21,711 INFO L225 Difference]: With dead ends: 96 [2020-10-12 16:26:21,711 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:26:21,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:26:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:26:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-10-12 16:26:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:26:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-10-12 16:26:21,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 18 [2020-10-12 16:26:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:21,767 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-10-12 16:26:21,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:26:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-10-12 16:26:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:26:21,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:21,769 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, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:21,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:26:21,770 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1949581335, now seen corresponding path program 1 times [2020-10-12 16:26:21,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:21,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666894028] [2020-10-12 16:26:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:21,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:21,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:21,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:21,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:22,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:23,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:23,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:26:23,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:26:23,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2134 [2020-10-12 16:26:23,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:26:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:26:23,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:24,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:24,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:24,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:24,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:24,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:24,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:26:24,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:24,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:24,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:24,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:24,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:26:24,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666894028] [2020-10-12 16:26:24,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:24,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:26:24,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103329765] [2020-10-12 16:26:24,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:26:24,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:24,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:26:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:26:24,224 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 9 states. [2020-10-12 16:26:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:24,350 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2020-10-12 16:26:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:26:24,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-12 16:26:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:24,353 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:26:24,353 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:26:24,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:26:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:26:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 16:26:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:26:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-12 16:26:24,364 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 26 [2020-10-12 16:26:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:24,365 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-12 16:26:24,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:26:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-12 16:26:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:26:24,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:24,368 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:24,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:26:24,370 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:24,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1646461547, now seen corresponding path program 1 times [2020-10-12 16:26:24,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:24,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311970729] [2020-10-12 16:26:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:24,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:24,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:24,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:24,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:28,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:28,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:26:28,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:26:28,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3755 [2020-10-12 16:26:28,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:26:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:26:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:28,379 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 27 [2020-10-12 16:26:28,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:28,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:28,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:28,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:28,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:28,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:26:28,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:28,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:28,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:28,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:26:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:26:28,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311970729] [2020-10-12 16:26:28,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:28,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:26:28,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103027126] [2020-10-12 16:26:28,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:26:28,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:28,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:26:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:26:28,533 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 10 states. [2020-10-12 16:26:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:29,351 INFO L93 Difference]: Finished difference Result 91 states and 121 transitions. [2020-10-12 16:26:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:26:29,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 16:26:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:29,354 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:26:29,354 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 16:26:29,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:26:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 16:26:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 55. [2020-10-12 16:26:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:26:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2020-10-12 16:26:29,384 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 28 [2020-10-12 16:26:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:29,384 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2020-10-12 16:26:29,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:26:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2020-10-12 16:26:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:26:29,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:29,392 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 16:26:29,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:26:29,392 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:29,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1671904679, now seen corresponding path program 1 times [2020-10-12 16:26:29,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:29,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819885883] [2020-10-12 16:26:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:29,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:29,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:29,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:29,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:34,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:34,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:26:34,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:26:34,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 16:26:34,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:34,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:26:34,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:34,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:26:34,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:34,815 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2020-10-12 16:26:35,063 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-12 16:26:35,385 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2020-10-12 16:26:35,588 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2020-10-12 16:26:35,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:35,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:35,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:35,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:35,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:35,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:26:35,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:35,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:35,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:35,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:35,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:26:35,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819885883] [2020-10-12 16:26:35,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:35,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:26:35,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608549137] [2020-10-12 16:26:35,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:26:35,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:35,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:26:35,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:26:35,647 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand 11 states. [2020-10-12 16:26:36,191 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-12 16:26:36,394 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-12 16:26:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:36,623 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2020-10-12 16:26:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:26:36,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-12 16:26:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:36,625 INFO L225 Difference]: With dead ends: 104 [2020-10-12 16:26:36,625 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:26:36,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:26:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:26:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-12 16:26:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:26:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2020-10-12 16:26:36,641 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 29 [2020-10-12 16:26:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:36,641 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2020-10-12 16:26:36,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:26:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2020-10-12 16:26:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:26:36,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:36,643 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, 1, 1, 1, 1, 1] [2020-10-12 16:26:36,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:26:36,643 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:36,644 INFO L82 PathProgramCache]: Analyzing trace with hash -922790646, now seen corresponding path program 2 times [2020-10-12 16:26:36,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:36,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013059517] [2020-10-12 16:26:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:36,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:36,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:36,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:36,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:37,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:37,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:26:37,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:26:37,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-12 16:26:37,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:37,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:26:37,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:37,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:26:37,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:37,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:37,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:37,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:37,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:37,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:37,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:26:37,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:37,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:26:37,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013059517] [2020-10-12 16:26:37,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:37,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:26:37,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568222159] [2020-10-12 16:26:37,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:26:37,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:37,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:26:37,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:26:37,570 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 5 states. [2020-10-12 16:26:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:37,766 INFO L93 Difference]: Finished difference Result 163 states and 221 transitions. [2020-10-12 16:26:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:26:37,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-12 16:26:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:37,769 INFO L225 Difference]: With dead ends: 163 [2020-10-12 16:26:37,773 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 16:26:37,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:26:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 16:26:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2020-10-12 16:26:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:26:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2020-10-12 16:26:37,808 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 31 [2020-10-12 16:26:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:37,808 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2020-10-12 16:26:37,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:26:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2020-10-12 16:26:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:26:37,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:37,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:37,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:26:37,811 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash -826846264, now seen corresponding path program 3 times [2020-10-12 16:26:37,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:37,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792502877] [2020-10-12 16:26:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:37,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:37,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:37,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:37,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:37,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:38,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:38,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:26:38,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:26:38,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-12 16:26:38,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:26:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:26:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:38,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:38,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:38,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:38,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:38,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:38,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:26:38,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:38,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:38,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:38,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:38,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:26:38,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792502877] [2020-10-12 16:26:38,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:38,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:26:38,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644699365] [2020-10-12 16:26:38,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:26:38,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:38,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:26:38,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:26:38,780 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 6 states. [2020-10-12 16:26:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:38,972 INFO L93 Difference]: Finished difference Result 196 states and 268 transitions. [2020-10-12 16:26:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:26:38,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-12 16:26:38,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:38,975 INFO L225 Difference]: With dead ends: 196 [2020-10-12 16:26:38,975 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 16:26:38,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:26:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 16:26:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 65. [2020-10-12 16:26:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:26:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2020-10-12 16:26:38,997 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 33 [2020-10-12 16:26:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:38,997 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2020-10-12 16:26:38,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:26:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2020-10-12 16:26:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:26:38,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:38,999 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] [2020-10-12 16:26:39,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:26:39,000 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:39,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:39,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1181391622, now seen corresponding path program 4 times [2020-10-12 16:26:39,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:39,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886944727] [2020-10-12 16:26:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:39,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:39,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:39,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:39,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:39,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:40,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:40,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:26:40,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:26:40,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1233 [2020-10-12 16:26:40,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:26:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:26:40,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:40,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:40,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:40,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:40,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:40,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:26:40,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:40,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:40,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:26:40,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886944727] [2020-10-12 16:26:40,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:40,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:26:40,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199623670] [2020-10-12 16:26:40,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:26:40,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:40,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:26:40,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:26:40,338 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 7 states. [2020-10-12 16:26:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:40,580 INFO L93 Difference]: Finished difference Result 229 states and 315 transitions. [2020-10-12 16:26:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:26:40,580 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-12 16:26:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:40,582 INFO L225 Difference]: With dead ends: 229 [2020-10-12 16:26:40,583 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 16:26:40,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:26:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 16:26:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 67. [2020-10-12 16:26:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:26:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-10-12 16:26:40,613 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 35 [2020-10-12 16:26:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:40,613 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-10-12 16:26:40,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:26:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-10-12 16:26:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:26:40,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:40,618 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-12 16:26:40,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:26:40,618 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1637283132, now seen corresponding path program 5 times [2020-10-12 16:26:40,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:40,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557600626] [2020-10-12 16:26:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:40,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:40,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:40,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:40,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:40,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:42,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:42,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:26:42,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:26:42,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1963 [2020-10-12 16:26:42,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:42,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:26:42,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:42,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:26:42,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:42,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:42,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:42,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:42,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:42,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:42,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:26:42,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:42,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:42,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:42,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:26:42,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557600626] [2020-10-12 16:26:42,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:42,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:26:42,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132688634] [2020-10-12 16:26:42,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:26:42,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:42,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:26:42,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:26:42,709 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 8 states. [2020-10-12 16:26:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:43,067 INFO L93 Difference]: Finished difference Result 262 states and 362 transitions. [2020-10-12 16:26:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:26:43,069 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-12 16:26:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:43,070 INFO L225 Difference]: With dead ends: 262 [2020-10-12 16:26:43,071 INFO L226 Difference]: Without dead ends: 210 [2020-10-12 16:26:43,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:26:43,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-12 16:26:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 69. [2020-10-12 16:26:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:26:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2020-10-12 16:26:43,094 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 37 [2020-10-12 16:26:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:43,094 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2020-10-12 16:26:43,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:26:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2020-10-12 16:26:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:26:43,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:43,098 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-12 16:26:43,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:26:43,099 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:43,099 INFO L82 PathProgramCache]: Analyzing trace with hash -259357950, now seen corresponding path program 6 times [2020-10-12 16:26:43,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:43,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866927088] [2020-10-12 16:26:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:43,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:43,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:43,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:43,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:43,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:43,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:26:43,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:26:43,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-12 16:26:43,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:26:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 16:26:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:26:43,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:43,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:43,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:43,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:43,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:43,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:26:43,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:43,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:43,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:43,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:43,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 16:26:43,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866927088] [2020-10-12 16:26:43,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:43,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:26:43,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977109333] [2020-10-12 16:26:43,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:26:43,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:43,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:26:43,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:26:43,649 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 5 states. [2020-10-12 16:26:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:43,744 INFO L93 Difference]: Finished difference Result 148 states and 206 transitions. [2020-10-12 16:26:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:26:43,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-12 16:26:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:43,745 INFO L225 Difference]: With dead ends: 148 [2020-10-12 16:26:43,745 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 16:26:43,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:26:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 16:26:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-10-12 16:26:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 16:26:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2020-10-12 16:26:43,775 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 39 [2020-10-12 16:26:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:43,775 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2020-10-12 16:26:43,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:26:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2020-10-12 16:26:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:26:43,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:43,778 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:43,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:26:43,779 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1193698278, now seen corresponding path program 1 times [2020-10-12 16:26:43,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:43,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165822235] [2020-10-12 16:26:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:43,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:43,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:44,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:46,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:46,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:26:46,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:26:46,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2979 [2020-10-12 16:26:46,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:46,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:26:46,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:26:46,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:47,252 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-12 16:26:47,423 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-10-12 16:26:47,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:47,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:47,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:47,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:47,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:47,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:26:47,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:47,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 16:26:47,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165822235] [2020-10-12 16:26:47,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:47,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:26:47,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925737374] [2020-10-12 16:26:47,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:26:47,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:47,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:26:47,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:26:47,881 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand 11 states. [2020-10-12 16:26:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:48,728 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2020-10-12 16:26:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:26:48,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-12 16:26:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:48,731 INFO L225 Difference]: With dead ends: 150 [2020-10-12 16:26:48,731 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 16:26:48,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:26:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 16:26:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-10-12 16:26:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 16:26:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2020-10-12 16:26:48,756 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 48 [2020-10-12 16:26:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:48,758 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2020-10-12 16:26:48,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:26:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2020-10-12 16:26:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:26:48,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:48,759 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2020-10-12 16:26:48,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:26:48,760 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash -935532840, now seen corresponding path program 2 times [2020-10-12 16:26:48,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:48,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286085104] [2020-10-12 16:26:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:48,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:48,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:48,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:26:48,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:26:48,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-12 16:26:48,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:48,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:26:48,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 16:26:48,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:26:48,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:49,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:49,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:49,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:49,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:49,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:49,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:26:49,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:49,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 16:26:49,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286085104] [2020-10-12 16:26:49,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:26:49,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:26:49,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043607422] [2020-10-12 16:26:49,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:26:49,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:49,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:26:49,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:26:49,027 INFO L87 Difference]: Start difference. First operand 107 states and 136 transitions. Second operand 4 states. [2020-10-12 16:26:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:49,125 INFO L93 Difference]: Finished difference Result 216 states and 280 transitions. [2020-10-12 16:26:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:26:49,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-12 16:26:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:49,127 INFO L225 Difference]: With dead ends: 216 [2020-10-12 16:26:49,127 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 16:26:49,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:26:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 16:26:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2020-10-12 16:26:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 16:26:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2020-10-12 16:26:49,153 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 48 [2020-10-12 16:26:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:49,154 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2020-10-12 16:26:49,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:26:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2020-10-12 16:26:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:26:49,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:49,155 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:49,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:26:49,156 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:49,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1068180702, now seen corresponding path program 1 times [2020-10-12 16:26:49,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:49,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673224887] [2020-10-12 16:26:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:49,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:49,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:51,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:54,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:54,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:26:54,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:26:54,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 16:26:54,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:26:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:26:54,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:54,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:54,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:54,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:54,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:54,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:26:54,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:54,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:54,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:54,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:54,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 16:26:54,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673224887] [2020-10-12 16:26:54,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:54,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:26:54,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735578239] [2020-10-12 16:26:54,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:26:54,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:54,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:26:54,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:26:54,612 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand 10 states. [2020-10-12 16:26:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:55,239 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2020-10-12 16:26:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:26:55,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-12 16:26:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:55,240 INFO L225 Difference]: With dead ends: 138 [2020-10-12 16:26:55,241 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 16:26:55,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:26:55,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 16:26:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 116. [2020-10-12 16:26:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 16:26:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2020-10-12 16:26:55,261 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 50 [2020-10-12 16:26:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:55,261 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2020-10-12 16:26:55,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:26:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2020-10-12 16:26:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:26:55,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:55,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2020-10-12 16:26:55,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:26:55,262 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:55,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:55,263 INFO L82 PathProgramCache]: Analyzing trace with hash 675153692, now seen corresponding path program 2 times [2020-10-12 16:26:55,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:55,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154085596] [2020-10-12 16:26:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:55,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:56,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:56,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:26:56,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:26:56,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-12 16:26:56,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:26:56,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 16:26:56,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:26:56,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:56,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:56,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:56,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:56,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:56,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:56,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:26:56,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:56,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:56,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-12 16:26:56,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154085596] [2020-10-12 16:26:56,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:26:56,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 16:26:56,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022014972] [2020-10-12 16:26:56,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:26:56,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:26:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:26:56,344 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand 9 states. [2020-10-12 16:26:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:56,682 INFO L93 Difference]: Finished difference Result 182 states and 235 transitions. [2020-10-12 16:26:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:26:56,682 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-12 16:26:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:56,684 INFO L225 Difference]: With dead ends: 182 [2020-10-12 16:26:56,684 INFO L226 Difference]: Without dead ends: 140 [2020-10-12 16:26:56,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:26:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-12 16:26:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 104. [2020-10-12 16:26:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 16:26:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2020-10-12 16:26:56,707 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 50 [2020-10-12 16:26:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:56,707 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2020-10-12 16:26:56,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:26:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2020-10-12 16:26:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:26:56,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:56,708 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2020-10-12 16:26:56,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:26:56,709 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1280745619, now seen corresponding path program 1 times [2020-10-12 16:26:56,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:56,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597995423] [2020-10-12 16:26:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:56,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:56,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:57,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:57,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:59,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:59,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:59,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:00,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:00,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:01,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:01,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:01,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:27:01,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:27:01,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:27:01,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:27:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 16:27:01,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:27:01,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:02,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:02,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:02,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:02,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:02,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:27:02,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:02,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 16:27:02,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597995423] [2020-10-12 16:27:02,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:02,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:27:02,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263437970] [2020-10-12 16:27:02,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:27:02,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:02,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:27:02,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:27:02,881 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand 21 states. [2020-10-12 16:27:05,221 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-12 16:27:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:27:07,729 INFO L93 Difference]: Finished difference Result 560 states and 747 transitions. [2020-10-12 16:27:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:27:07,730 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-12 16:27:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:27:07,734 INFO L225 Difference]: With dead ends: 560 [2020-10-12 16:27:07,735 INFO L226 Difference]: Without dead ends: 523 [2020-10-12 16:27:07,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=873, Invalid=3957, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:27:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-12 16:27:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 151. [2020-10-12 16:27:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 16:27:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 202 transitions. [2020-10-12 16:27:07,770 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 202 transitions. Word has length 50 [2020-10-12 16:27:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:27:07,771 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 202 transitions. [2020-10-12 16:27:07,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:27:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 202 transitions. [2020-10-12 16:27:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:27:07,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:27:07,772 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2020-10-12 16:27:07,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:27:07,772 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:27:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:27:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash -257283497, now seen corresponding path program 2 times [2020-10-12 16:27:07,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:27:07,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506171119] [2020-10-12 16:27:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:27:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:07,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:07,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:07,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:08,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:08,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:08,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:08,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:09,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:09,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:09,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:09,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:11,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:12,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:12,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:27:12,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 16:27:12,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 16:27:12,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:12,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:27:12,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:27:12,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:27:12,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:13,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:13,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:13,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:13,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:13,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:27:13,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:13,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:13,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:13,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:13,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-12 16:27:13,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506171119] [2020-10-12 16:27:13,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:13,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:27:13,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662815543] [2020-10-12 16:27:13,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:27:13,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:13,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:27:13,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:27:13,334 INFO L87 Difference]: Start difference. First operand 151 states and 202 transitions. Second operand 13 states. [2020-10-12 16:27:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:27:14,811 INFO L93 Difference]: Finished difference Result 339 states and 457 transitions. [2020-10-12 16:27:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:27:14,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-12 16:27:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:27:14,818 INFO L225 Difference]: With dead ends: 339 [2020-10-12 16:27:14,818 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 16:27:14,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:27:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 16:27:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 146. [2020-10-12 16:27:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 16:27:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2020-10-12 16:27:14,850 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 50 [2020-10-12 16:27:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:27:14,850 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2020-10-12 16:27:14,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:27:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2020-10-12 16:27:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:27:14,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:27:14,851 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:27:14,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:27:14,851 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:27:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:27:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash 820587580, now seen corresponding path program 1 times [2020-10-12 16:27:14,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:27:14,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911757218] [2020-10-12 16:27:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:27:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:14,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:15,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:15,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:27:15,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-12 16:27:15,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:27:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 16:27:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:27:15,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:15,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:15,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:15,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:15,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:15,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:15,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:27:15,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:15,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:15,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:15,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:15,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-12 16:27:15,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911757218] [2020-10-12 16:27:15,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:15,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:27:15,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873413867] [2020-10-12 16:27:15,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:27:15,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:15,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:27:15,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:27:15,270 INFO L87 Difference]: Start difference. First operand 146 states and 194 transitions. Second operand 9 states. [2020-10-12 16:27:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:27:15,595 INFO L93 Difference]: Finished difference Result 258 states and 348 transitions. [2020-10-12 16:27:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:27:15,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-12 16:27:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:27:15,598 INFO L225 Difference]: With dead ends: 258 [2020-10-12 16:27:15,598 INFO L226 Difference]: Without dead ends: 253 [2020-10-12 16:27:15,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:27:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-12 16:27:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2020-10-12 16:27:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-12 16:27:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 285 transitions. [2020-10-12 16:27:15,643 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 285 transitions. Word has length 51 [2020-10-12 16:27:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:27:15,643 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 285 transitions. [2020-10-12 16:27:15,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:27:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 285 transitions. [2020-10-12 16:27:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:27:15,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:27:15,644 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:27:15,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:27:15,645 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:27:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:27:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash 233781566, now seen corresponding path program 1 times [2020-10-12 16:27:15,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:27:15,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020704214] [2020-10-12 16:27:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:27:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:15,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:15,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:16,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:16,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:16,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:17,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:17,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:17,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:20,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:20,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:27:20,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:27:20,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:27:20,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:20,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:27:20,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 16:27:20,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:27:20,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:21,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:21,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:21,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:21,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:21,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:21,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:27:21,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:21,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:21,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 16:27:21,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020704214] [2020-10-12 16:27:21,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:21,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:27:21,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676598600] [2020-10-12 16:27:21,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:27:21,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:27:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:27:21,389 INFO L87 Difference]: Start difference. First operand 210 states and 285 transitions. Second operand 14 states. [2020-10-12 16:27:21,641 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-12 16:27:22,034 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-12 16:27:24,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:27:24,050 INFO L93 Difference]: Finished difference Result 508 states and 683 transitions. [2020-10-12 16:27:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:27:24,051 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-12 16:27:24,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:27:24,053 INFO L225 Difference]: With dead ends: 508 [2020-10-12 16:27:24,054 INFO L226 Difference]: Without dead ends: 316 [2020-10-12 16:27:24,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:27:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-12 16:27:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 186. [2020-10-12 16:27:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-12 16:27:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 223 transitions. [2020-10-12 16:27:24,111 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 223 transitions. Word has length 51 [2020-10-12 16:27:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:27:24,112 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 223 transitions. [2020-10-12 16:27:24,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:27:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 223 transitions. [2020-10-12 16:27:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:27:24,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:27:24,113 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:27:24,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:27:24,114 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:27:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:27:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash 155475458, now seen corresponding path program 2 times [2020-10-12 16:27:24,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:27:24,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537777862] [2020-10-12 16:27:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:27:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:24,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:24,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:24,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:24,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:25,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:26,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:26,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:27,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:28,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:28,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:29,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:29,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:29,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:29,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:27:29,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 16:27:29,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:27:29,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:29,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:27:29,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 16:27:29,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:27:29,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:29,729 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-12 16:27:29,902 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2020-10-12 16:27:29,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:29,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:29,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:29,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:29,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:29,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:27:29,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:29,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:27:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 16:27:30,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537777862] [2020-10-12 16:27:30,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:30,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:27:30,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942894807] [2020-10-12 16:27:30,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:27:30,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:30,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:27:30,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:27:30,015 INFO L87 Difference]: Start difference. First operand 186 states and 223 transitions. Second operand 14 states. [2020-10-12 16:27:30,986 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-12 16:27:31,204 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-12 16:27:31,552 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-12 16:27:32,713 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 16:27:32,970 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-12 16:27:33,236 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-12 16:27:33,832 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-12 16:27:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:27:34,125 INFO L93 Difference]: Finished difference Result 437 states and 519 transitions. [2020-10-12 16:27:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:27:34,127 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-12 16:27:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:27:34,129 INFO L225 Difference]: With dead ends: 437 [2020-10-12 16:27:34,129 INFO L226 Difference]: Without dead ends: 369 [2020-10-12 16:27:34,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:27:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-12 16:27:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 262. [2020-10-12 16:27:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-12 16:27:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 315 transitions. [2020-10-12 16:27:34,185 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 315 transitions. Word has length 51 [2020-10-12 16:27:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:27:34,185 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 315 transitions. [2020-10-12 16:27:34,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:27:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 315 transitions. [2020-10-12 16:27:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:27:34,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:27:34,186 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:27:34,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:27:34,187 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:27:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:27:34,187 INFO L82 PathProgramCache]: Analyzing trace with hash 961136190, now seen corresponding path program 1 times [2020-10-12 16:27:34,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:27:34,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593245028] [2020-10-12 16:27:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:27:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:34,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:34,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:34,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:34,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:35,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:35,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:36,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:36,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:36,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:39,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:39,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:27:39,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 16:27:39,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 16:27:39,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:27:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 16:27:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:27:39,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:39,630 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-12 16:27:40,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:40,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:40,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:40,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:40,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:40,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:27:40,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:40,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:40,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:27:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 16:27:40,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593245028] [2020-10-12 16:27:40,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:40,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:27:40,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119410011] [2020-10-12 16:27:40,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:27:40,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:27:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:27:40,199 INFO L87 Difference]: Start difference. First operand 262 states and 315 transitions. Second operand 14 states. [2020-10-12 16:27:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:27:41,911 INFO L93 Difference]: Finished difference Result 393 states and 464 transitions. [2020-10-12 16:27:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:27:41,913 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-12 16:27:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:27:41,915 INFO L225 Difference]: With dead ends: 393 [2020-10-12 16:27:41,915 INFO L226 Difference]: Without dead ends: 359 [2020-10-12 16:27:41,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:27:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-12 16:27:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 274. [2020-10-12 16:27:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-12 16:27:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 329 transitions. [2020-10-12 16:27:42,027 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 329 transitions. Word has length 51 [2020-10-12 16:27:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:27:42,028 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 329 transitions. [2020-10-12 16:27:42,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:27:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 329 transitions. [2020-10-12 16:27:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:27:42,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:27:42,039 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:27:42,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:27:42,040 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:27:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:27:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash 767357186, now seen corresponding path program 2 times [2020-10-12 16:27:42,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:27:42,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338633712] [2020-10-12 16:27:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:27:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:42,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:42,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:42,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:42,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:42,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:43,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:43,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:43,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:43,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:43,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:43,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:43,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:45,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:45,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:45,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:45,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:46,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:47,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:47,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:27:47,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 16:27:47,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 16:27:47,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:27:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 16:27:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:27:47,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:47,688 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-12 16:27:47,842 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-12 16:27:48,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:48,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:48,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:48,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:48,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:27:48,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:48,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 16:27:48,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338633712] [2020-10-12 16:27:48,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:48,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:27:48,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665214267] [2020-10-12 16:27:48,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:27:48,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:27:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:27:48,059 INFO L87 Difference]: Start difference. First operand 274 states and 329 transitions. Second operand 15 states. [2020-10-12 16:27:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:27:51,485 INFO L93 Difference]: Finished difference Result 609 states and 712 transitions. [2020-10-12 16:27:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:27:51,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-12 16:27:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:27:51,492 INFO L225 Difference]: With dead ends: 609 [2020-10-12 16:27:51,492 INFO L226 Difference]: Without dead ends: 523 [2020-10-12 16:27:51,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=566, Invalid=1984, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:27:51,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-12 16:27:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 276. [2020-10-12 16:27:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-12 16:27:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 325 transitions. [2020-10-12 16:27:51,593 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 325 transitions. Word has length 51 [2020-10-12 16:27:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:27:51,594 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 325 transitions. [2020-10-12 16:27:51,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:27:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 325 transitions. [2020-10-12 16:27:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:27:51,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:27:51,595 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2020-10-12 16:27:51,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:27:51,595 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:27:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:27:51,596 INFO L82 PathProgramCache]: Analyzing trace with hash 820565902, now seen corresponding path program 3 times [2020-10-12 16:27:51,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:27:51,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302731130] [2020-10-12 16:27:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:27:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:51,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:51,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:51,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:52,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:52,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:54,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:56,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:56,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:27:56,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:27:56,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:27:56,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:27:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:27:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:27:56,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:56,927 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 34 [2020-10-12 16:27:57,361 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 56 [2020-10-12 16:27:57,593 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 54 [2020-10-12 16:27:57,831 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 56 [2020-10-12 16:27:58,105 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2020-10-12 16:27:58,631 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 55 [2020-10-12 16:27:59,108 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 36 [2020-10-12 16:27:59,567 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 30 [2020-10-12 16:27:59,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:59,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:59,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:59,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:59,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:27:59,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:59,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:59,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:59,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:59,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-12 16:27:59,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302731130] [2020-10-12 16:27:59,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:59,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:27:59,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250383993] [2020-10-12 16:27:59,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:27:59,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:59,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:27:59,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:27:59,927 INFO L87 Difference]: Start difference. First operand 276 states and 325 transitions. Second operand 19 states. [2020-10-12 16:28:00,343 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-12 16:28:00,656 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-12 16:28:00,900 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-12 16:28:01,225 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-12 16:28:01,632 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-10-12 16:28:01,964 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2020-10-12 16:28:02,237 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2020-10-12 16:28:02,473 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-12 16:28:02,709 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-12 16:28:03,088 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-12 16:28:03,355 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-12 16:28:03,827 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-12 16:28:04,158 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-12 16:28:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:28:04,426 INFO L93 Difference]: Finished difference Result 666 states and 775 transitions. [2020-10-12 16:28:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:28:04,428 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-12 16:28:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:28:04,431 INFO L225 Difference]: With dead ends: 666 [2020-10-12 16:28:04,431 INFO L226 Difference]: Without dead ends: 661 [2020-10-12 16:28:04,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=231, Invalid=825, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:28:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-10-12 16:28:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 292. [2020-10-12 16:28:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-12 16:28:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 345 transitions. [2020-10-12 16:28:04,539 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 345 transitions. Word has length 52 [2020-10-12 16:28:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:28:04,540 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 345 transitions. [2020-10-12 16:28:04,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:28:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 345 transitions. [2020-10-12 16:28:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:28:04,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:28:04,541 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:28:04,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:28:04,542 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:28:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:28:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1225193881, now seen corresponding path program 3 times [2020-10-12 16:28:04,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:28:04,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470177243] [2020-10-12 16:28:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:28:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:28:04,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:04,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:05,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:05,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:05,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:05,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:06,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:06,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:09,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:28:09,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:28:09,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:28:09,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 16:28:09,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:28:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:28:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 16:28:09,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:28:09,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:28:10,050 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-12 16:28:10,239 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-12 16:28:10,576 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-12 16:28:10,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:28:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:28:10,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:10,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:28:10,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:28:10,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:28:10,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:28:10,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:28:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:28:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:28:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:28:10,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:28:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-12 16:28:10,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470177243] [2020-10-12 16:28:10,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:28:10,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:28:10,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480126380] [2020-10-12 16:28:10,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:28:10,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:28:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:28:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:28:10,638 INFO L87 Difference]: Start difference. First operand 292 states and 345 transitions. Second operand 13 states. [2020-10-12 16:28:11,580 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-12 16:28:11,771 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-12 16:28:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:28:11,963 INFO L93 Difference]: Finished difference Result 400 states and 467 transitions. [2020-10-12 16:28:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:28:11,967 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-12 16:28:11,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:28:11,969 INFO L225 Difference]: With dead ends: 400 [2020-10-12 16:28:11,969 INFO L226 Difference]: Without dead ends: 359 [2020-10-12 16:28:11,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:28:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-12 16:28:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 282. [2020-10-12 16:28:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-12 16:28:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 335 transitions. [2020-10-12 16:28:12,045 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 335 transitions. Word has length 53 [2020-10-12 16:28:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:28:12,046 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 335 transitions. [2020-10-12 16:28:12,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:28:12,046 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 335 transitions. [2020-10-12 16:28:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:28:12,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:28:12,047 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:28:12,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:28:12,048 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:28:12,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:28:12,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1322135589, now seen corresponding path program 2 times [2020-10-12 16:28:12,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:28:12,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105415631] [2020-10-12 16:28:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:28:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:28:12,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:12,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:12,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:12,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:12,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:13,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:14,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:15,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:15,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:16,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:17,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:28:17,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:28:17,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:28:17,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 16:28:17,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:28:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:28:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 16:28:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:28:17,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:28:17,346 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 19 [2020-10-12 16:28:17,610 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 22 [2020-10-12 16:28:17,843 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 40 [2020-10-12 16:28:18,137 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-10-12 16:28:18,427 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-10-12 16:28:18,630 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-10-12 16:28:18,979 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2020-10-12 16:28:19,179 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-12 16:28:19,400 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 31 [2020-10-12 16:28:19,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:28:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:28:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:19,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:28:19,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:28:19,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:28:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:28:19,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:28:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:28:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:28:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:28:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:28:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 16:28:19,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105415631] [2020-10-12 16:28:19,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:28:19,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:28:19,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579709829] [2020-10-12 16:28:19,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:28:19,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:28:19,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:28:19,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:28:19,686 INFO L87 Difference]: Start difference. First operand 282 states and 335 transitions. Second operand 20 states. [2020-10-12 16:28:20,520 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 16:28:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:28:21,728 INFO L93 Difference]: Finished difference Result 442 states and 512 transitions. [2020-10-12 16:28:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:28:21,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-12 16:28:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:28:21,730 INFO L225 Difference]: With dead ends: 442 [2020-10-12 16:28:21,730 INFO L226 Difference]: Without dead ends: 328 [2020-10-12 16:28:21,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:28:21,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-12 16:28:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 245. [2020-10-12 16:28:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-12 16:28:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 288 transitions. [2020-10-12 16:28:21,807 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 288 transitions. Word has length 60 [2020-10-12 16:28:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:28:21,807 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 288 transitions. [2020-10-12 16:28:21,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:28:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 288 transitions. [2020-10-12 16:28:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:28:21,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:28:21,809 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:28:21,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:28:21,809 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:28:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:28:21,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1895532695, now seen corresponding path program 3 times [2020-10-12 16:28:21,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:28:21,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562702999] [2020-10-12 16:28:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:28:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:28:21,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:21,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:22,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:22,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:22,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:22,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:22,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:22,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:28:26,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:28:26,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:28:26,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:28:26,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 16:28:26,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:28:26,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:28:26,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 16:28:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:28:26,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0