/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/array-examples/standard_two_index_01.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:43:03,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:43:03,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:43:03,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:43:03,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:43:03,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:43:03,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:43:03,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:43:03,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:43:03,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:43:03,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:43:03,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:43:03,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:43:03,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:43:03,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:43:03,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:43:03,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:43:03,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:43:03,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:43:03,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:43:03,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:43:03,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:43:03,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:43:03,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:43:03,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:43:03,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:43:03,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:43:03,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:43:03,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:43:03,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:43:03,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:43:03,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:43:03,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:43:03,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:43:03,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:43:03,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:43:03,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:43:03,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:43:03,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:43:03,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:43:03,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:43:03,783 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 [2020-10-13 23:43:03,823 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:43:03,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:43:03,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:43:03,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:43:03,826 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:43:03,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:43:03,827 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:43:03,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:43:03,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:43:03,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:43:03,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:43:03,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:43:03,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:43:03,829 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:43:03,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:43:03,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:43:03,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:43:03,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:43:03,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:43:03,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:43:03,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:43:03,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:43:03,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:43:03,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:43:03,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:43:03,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:43:03,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:43:03,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:43:03,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:43:03,833 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:43:04,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:43:04,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:43:04,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:43:04,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:43:04,180 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:43:04,181 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i [2020-10-13 23:43:04,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/779049f47/00466652559547f181735e271903e3d7/FLAG5d811b847 [2020-10-13 23:43:04,694 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:43:04,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_01.i [2020-10-13 23:43:04,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/779049f47/00466652559547f181735e271903e3d7/FLAG5d811b847 [2020-10-13 23:43:05,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/779049f47/00466652559547f181735e271903e3d7 [2020-10-13 23:43:05,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:43:05,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:43:05,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:43:05,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:43:05,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:43:05,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db1276a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05, skipping insertion in model container [2020-10-13 23:43:05,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:43:05,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:43:05,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:43:05,368 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:43:05,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:43:05,413 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:43:05,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05 WrapperNode [2020-10-13 23:43:05,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:43:05,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:43:05,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:43:05,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:43:05,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (1/1) ... [2020-10-13 23:43:05,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:43:05,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:43:05,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:43:05,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:43:05,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (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 [2020-10-13 23:43:05,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:43:05,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:43:05,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:43:05,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:43:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:43:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:43:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:43:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:43:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:43:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:43:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:43:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:43:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:43:05,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:43:05,827 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:43:05,828 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:43:05,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:43:05 BoogieIcfgContainer [2020-10-13 23:43:05,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:43:05,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:43:05,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:43:05,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:43:05,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:43:05" (1/3) ... [2020-10-13 23:43:05,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6588dd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:43:05, skipping insertion in model container [2020-10-13 23:43:05,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:43:05" (2/3) ... [2020-10-13 23:43:05,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6588dd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:43:05, skipping insertion in model container [2020-10-13 23:43:05,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:43:05" (3/3) ... [2020-10-13 23:43:05,857 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2020-10-13 23:43:05,889 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:43:05,897 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:43:05,930 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:43:05,960 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:43:05,960 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:43:05,960 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:43:05,960 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:43:05,960 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:43:05,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:43:05,961 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:43:05,961 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:43:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 23:43:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:43:05,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:05,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:05,985 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:05,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2020-10-13 23:43:05,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:05,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069630971] [2020-10-13 23:43:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:06,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:06,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:43:06,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:06,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-13 23:43:06,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:06,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:06,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:06,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:43:06,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:06,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:43:06,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:06,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:06,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:06,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 23:43:06,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:06,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:06,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:06,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:06,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:06,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:43:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:43:06,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069630971] [2020-10-13 23:43:06,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:43:06,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:43:06,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421491871] [2020-10-13 23:43:06,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:43:06,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:43:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:43:06,454 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-13 23:43:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:06,529 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-13 23:43:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:43:06,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 23:43:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:06,540 INFO L225 Difference]: With dead ends: 41 [2020-10-13 23:43:06,541 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 23:43:06,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:43:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 23:43:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 23:43:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 23:43:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 23:43:06,582 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-13 23:43:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:06,582 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 23:43:06,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:43:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 23:43:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:43:06,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:06,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:06,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:43:06,585 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2020-10-13 23:43:06,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:06,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557812095] [2020-10-13 23:43:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:06,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:06,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:43:06,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:06,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-13 23:43:06,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:06,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:06,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:43:06,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:06,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:43:06,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:43:06,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:06,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:06,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:06,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:06,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:43:06,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:06,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:06,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:43:06,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557812095] [2020-10-13 23:43:06,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:43:06,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:43:06,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738987674] [2020-10-13 23:43:06,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:43:06,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:06,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:43:06,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:43:06,859 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-13 23:43:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:06,943 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-13 23:43:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:43:06,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:43:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:06,947 INFO L225 Difference]: With dead ends: 36 [2020-10-13 23:43:06,947 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 23:43:06,948 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 [2020-10-13 23:43:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 23:43:06,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 23:43:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 23:43:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 23:43:06,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-13 23:43:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:06,961 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 23:43:06,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:43:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 23:43:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:43:06,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:06,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:06,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:43:06,963 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2020-10-13 23:43:06,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:06,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301357448] [2020-10-13 23:43:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:07,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:43:07,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:07,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-13 23:43:07,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:07,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:07,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:43:07,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:43:07,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:43:07,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:07,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:07,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:07,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:07,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:07,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:43:07,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:07,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:07,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:43:07,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301357448] [2020-10-13 23:43:07,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:07,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:43:07,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600553691] [2020-10-13 23:43:07,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:43:07,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:07,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:43:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:43:07,546 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 23:43:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:07,663 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-13 23:43:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:43:07,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 23:43:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:07,665 INFO L225 Difference]: With dead ends: 42 [2020-10-13 23:43:07,665 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:43:07,667 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 [2020-10-13 23:43:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:43:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-13 23:43:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 23:43:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 23:43:07,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-13 23:43:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:07,679 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 23:43:07,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:43:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 23:43:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:43:07,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:07,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:07,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:43:07,682 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash -406079354, now seen corresponding path program 2 times [2020-10-13 23:43:07,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:07,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536749506] [2020-10-13 23:43:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:07,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:08,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:43:08,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:08,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-13 23:43:08,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:08,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:08,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:43:08,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:43:08,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:43:08,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:08,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:08,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:08,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:08,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:08,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:08,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:08,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:08,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:08,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 23:43:08,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536749506] [2020-10-13 23:43:08,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:08,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:43:08,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300141260] [2020-10-13 23:43:08,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:43:08,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:43:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:43:08,240 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 23:43:08,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:08,338 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-13 23:43:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:43:08,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 23:43:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:08,341 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:43:08,341 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:43:08,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:43:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:43:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-13 23:43:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:43:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 23:43:08,349 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-13 23:43:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:08,349 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 23:43:08,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:43:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 23:43:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:43:08,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:08,351 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:08,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:43:08,351 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:08,352 INFO L82 PathProgramCache]: Analyzing trace with hash -820912923, now seen corresponding path program 3 times [2020-10-13 23:43:08,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:08,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484209776] [2020-10-13 23:43:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:08,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:08,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:43:08,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:08,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-13 23:43:08,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:08,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:08,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:43:08,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:43:08,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:43:08,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:08,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:08,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:08,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:08,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:08,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:08,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:08,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:08,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:08,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:08,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:43:08,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484209776] [2020-10-13 23:43:08,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:08,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:43:08,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316218829] [2020-10-13 23:43:08,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:43:08,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:08,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:43:08,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:43:08,978 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 23:43:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:09,090 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-13 23:43:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:43:09,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 23:43:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:09,091 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:43:09,092 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:43:09,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:43:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:43:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-13 23:43:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:43:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 23:43:09,099 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-13 23:43:09,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:09,099 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 23:43:09,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:43:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 23:43:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:43:09,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:09,101 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:09,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:43:09,101 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1912151398, now seen corresponding path program 4 times [2020-10-13 23:43:09,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:09,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220050983] [2020-10-13 23:43:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:09,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:09,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:09,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:10,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:43:10,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:10,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-13 23:43:10,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:10,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:43:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:43:10,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:10,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:10,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:10,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:10,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:10,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:10,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:10,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:10,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:10,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:10,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:10,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:43:10,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220050983] [2020-10-13 23:43:10,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:10,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:43:10,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436104595] [2020-10-13 23:43:10,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:43:10,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:43:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:43:10,306 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-13 23:43:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:10,480 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-13 23:43:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:43:10,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 23:43:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:10,482 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:43:10,482 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:43:10,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:43:10,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:43:10,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-10-13 23:43:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:43:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 23:43:10,489 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-10-13 23:43:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:10,490 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 23:43:10,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:43:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 23:43:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:43:10,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:10,491 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:10,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:43:10,492 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash 378570245, now seen corresponding path program 5 times [2020-10-13 23:43:10,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:10,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24530713] [2020-10-13 23:43:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:10,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:11,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:11,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:11,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:43:11,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:11,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1448 [2020-10-13 23:43:11,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:11,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:11,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:43:11,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:11,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:43:11,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:12,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:12,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:12,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:12,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:12,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:12,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:12,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:12,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:43:12,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24530713] [2020-10-13 23:43:12,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:12,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:43:12,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051465672] [2020-10-13 23:43:12,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:43:12,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:12,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:43:12,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:43:12,052 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-13 23:43:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:12,244 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-13 23:43:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:43:12,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 23:43:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:12,246 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:43:12,246 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:43:12,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:43:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:43:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-10-13 23:43:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:43:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 23:43:12,253 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-13 23:43:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:12,254 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 23:43:12,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:43:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 23:43:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:43:12,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:12,255 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:12,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:43:12,255 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1539667386, now seen corresponding path program 6 times [2020-10-13 23:43:12,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:12,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108937740] [2020-10-13 23:43:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:12,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:12,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:14,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:14,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:43:14,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:14,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2191 [2020-10-13 23:43:14,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:14,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:14,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:43:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:43:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:14,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:14,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:14,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:14,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:14,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:14,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:14,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:14,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:43:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:43:14,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108937740] [2020-10-13 23:43:14,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:14,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:43:14,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181365416] [2020-10-13 23:43:14,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:43:14,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:14,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:43:14,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:14,554 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-13 23:43:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:14,742 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-13 23:43:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:43:14,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-13 23:43:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:14,744 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:43:14,744 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:43:14,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:43:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2020-10-13 23:43:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:43:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 23:43:14,756 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-13 23:43:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:14,756 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 23:43:14,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:43:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 23:43:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:43:14,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:14,758 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:14,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:43:14,758 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash -411883739, now seen corresponding path program 7 times [2020-10-13 23:43:14,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:14,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731733138] [2020-10-13 23:43:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:14,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:14,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:15,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:17,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:43:17,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:17,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-13 23:43:17,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:17,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:17,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:43:17,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:43:17,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:43:17,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:17,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:17,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:17,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:17,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:17,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:17,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:17,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:17,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:43:17,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731733138] [2020-10-13 23:43:17,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:17,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:43:17,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962569719] [2020-10-13 23:43:17,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:43:17,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:43:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:17,728 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2020-10-13 23:43:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:17,919 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-13 23:43:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:43:17,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-13 23:43:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:17,921 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:43:17,921 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:43:17,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:43:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-10-13 23:43:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:43:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 23:43:17,935 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-13 23:43:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:17,937 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 23:43:17,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:43:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 23:43:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:43:17,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:17,939 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:17,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:43:17,939 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash -959578330, now seen corresponding path program 8 times [2020-10-13 23:43:17,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:17,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386524091] [2020-10-13 23:43:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:17,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:19,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:21,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:43:21,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:21,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3503 [2020-10-13 23:43:21,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:21,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:43:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:43:21,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:43:21,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:21,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:21,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:21,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:21,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:21,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:21,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:21,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:21,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:21,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:43:21,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386524091] [2020-10-13 23:43:21,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:21,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:43:21,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705568619] [2020-10-13 23:43:21,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:43:21,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:21,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:43:21,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:21,565 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2020-10-13 23:43:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:21,748 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 23:43:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:43:21,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-13 23:43:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:21,750 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:43:21,750 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:43:21,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:43:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2020-10-13 23:43:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:43:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 23:43:21,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2020-10-13 23:43:21,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:21,764 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 23:43:21,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:43:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 23:43:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:43:21,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:21,766 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:21,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:43:21,767 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:21,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1380204475, now seen corresponding path program 9 times [2020-10-13 23:43:21,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:21,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953049581] [2020-10-13 23:43:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:21,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:25,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:25,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:43:25,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:25,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3925 [2020-10-13 23:43:25,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:25,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:25,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:43:25,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:25,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:43:25,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:25,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:25,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:25,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:25,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:25,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:25,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:25,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:25,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:25,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 23:43:25,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953049581] [2020-10-13 23:43:25,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:25,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:43:25,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837745810] [2020-10-13 23:43:25,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:43:25,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:25,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:43:25,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:25,836 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2020-10-13 23:43:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:26,088 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-13 23:43:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:43:26,089 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-13 23:43:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:26,090 INFO L225 Difference]: With dead ends: 90 [2020-10-13 23:43:26,090 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:43:26,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:43:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2020-10-13 23:43:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:43:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-13 23:43:26,098 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-13 23:43:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:26,098 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-13 23:43:26,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:43:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-13 23:43:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:43:26,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:26,099 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:26,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:43:26,100 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:26,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2054257670, now seen corresponding path program 10 times [2020-10-13 23:43:26,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:26,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529344871] [2020-10-13 23:43:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:27,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:29,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:29,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:43:29,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:29,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3734 [2020-10-13 23:43:29,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:29,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:29,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:43:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:43:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:43:29,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:29,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:29,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:29,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:29,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:29,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:29,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:29,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:29,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:29,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 23:43:29,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529344871] [2020-10-13 23:43:29,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:29,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:43:29,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162421140] [2020-10-13 23:43:29,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:43:29,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:29,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:43:29,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:29,993 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-13 23:43:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:30,213 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-10-13 23:43:30,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:43:30,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-13 23:43:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:30,215 INFO L225 Difference]: With dead ends: 96 [2020-10-13 23:43:30,215 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:43:30,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:43:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2020-10-13 23:43:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:43:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 23:43:30,229 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-10-13 23:43:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:30,230 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 23:43:30,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:43:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 23:43:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:43:30,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:30,232 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:30,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:43:30,232 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1290555749, now seen corresponding path program 11 times [2020-10-13 23:43:30,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:30,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750514224] [2020-10-13 23:43:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:30,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:32,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:34,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:34,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:43:34,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:34,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4158 [2020-10-13 23:43:34,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:34,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:43:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:34,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:43:34,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:35,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:35,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:35,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:35,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:35,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:35,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:35,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:35,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:35,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 23:43:35,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750514224] [2020-10-13 23:43:35,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:35,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:43:35,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920342827] [2020-10-13 23:43:35,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:43:35,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:43:35,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:43:35,318 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 20 states. [2020-10-13 23:43:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:35,941 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-13 23:43:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:43:35,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-13 23:43:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:35,943 INFO L225 Difference]: With dead ends: 74 [2020-10-13 23:43:35,943 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 23:43:35,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:43:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 23:43:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 47. [2020-10-13 23:43:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:43:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 23:43:35,958 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2020-10-13 23:43:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:35,958 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 23:43:35,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:43:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 23:43:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:43:35,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:35,960 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:35,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:43:35,960 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1021620940, now seen corresponding path program 1 times [2020-10-13 23:43:35,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:35,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566233096] [2020-10-13 23:43:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:35,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:40,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:40,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:43:40,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:40,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:43:40,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:40,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:40,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:43:40,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:43:40,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:43:40,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:41,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:41,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:41,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:41,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:41,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:41,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:41,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:41,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:41,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 23:43:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:41,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:41,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:41,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:41,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:41,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:41,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:41,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:41,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-13 23:43:41,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566233096] [2020-10-13 23:43:41,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:41,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:43:41,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867731328] [2020-10-13 23:43:41,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:43:41,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:41,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:43:41,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:41,121 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 15 states. [2020-10-13 23:43:41,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:41,432 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2020-10-13 23:43:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:43:41,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-13 23:43:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:41,434 INFO L225 Difference]: With dead ends: 112 [2020-10-13 23:43:41,434 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:43:41,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:43:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-13 23:43:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 23:43:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-13 23:43:41,447 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2020-10-13 23:43:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:41,447 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-13 23:43:41,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:43:41,447 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-13 23:43:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:43:41,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:41,448 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:41,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:43:41,448 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:41,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2033008597, now seen corresponding path program 2 times [2020-10-13 23:43:41,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:41,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871109044] [2020-10-13 23:43:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:41,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:43,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:46,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:46,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:43:46,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:46,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:43:46,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:46,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:46,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:43:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:43:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:43:46,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:46,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:46,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:46,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:46,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:46,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:46,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:46,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:46,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:46,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 23:43:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:46,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:46,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:46,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:46,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:46,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:43:46,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:46,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:46,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 23:43:46,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871109044] [2020-10-13 23:43:46,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:46,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:43:46,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270575304] [2020-10-13 23:43:46,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:43:46,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:43:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:46,619 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 16 states. [2020-10-13 23:43:46,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:46,919 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2020-10-13 23:43:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:43:46,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-13 23:43:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:46,920 INFO L225 Difference]: With dead ends: 118 [2020-10-13 23:43:46,921 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:43:46,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:43:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2020-10-13 23:43:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:43:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-13 23:43:46,944 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2020-10-13 23:43:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:46,944 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-13 23:43:46,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:43:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-13 23:43:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:43:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:46,947 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:46,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:43:46,948 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash -172776020, now seen corresponding path program 3 times [2020-10-13 23:43:46,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:46,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799953977] [2020-10-13 23:43:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:46,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:49,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:51,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:51,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:43:51,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:51,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:43:51,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:51,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:43:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:51,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:43:51,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:53,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:53,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:53,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:53,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:53,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:53,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:53,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:53,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:53,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:53,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:53,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:53,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:43:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:53,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:53,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:53,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:53,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:53,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:53,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:53,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:53,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:43:53,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:53,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:43:53,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 47 proven. 48 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-13 23:43:53,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799953977] [2020-10-13 23:43:53,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:53,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:43:53,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880660608] [2020-10-13 23:43:53,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:43:53,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:43:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:43:53,108 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 23 states. [2020-10-13 23:43:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:53,942 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2020-10-13 23:43:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:43:53,943 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2020-10-13 23:43:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:53,945 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:43:53,945 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:43:53,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:43:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:43:53,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2020-10-13 23:43:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:43:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 23:43:53,959 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 48 [2020-10-13 23:43:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:53,960 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 23:43:53,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:43:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 23:43:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:43:53,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:53,961 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:53,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:43:53,961 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:53,962 INFO L82 PathProgramCache]: Analyzing trace with hash 678056101, now seen corresponding path program 4 times [2020-10-13 23:43:53,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:53,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960607071] [2020-10-13 23:43:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:53,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:57,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:58,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:43:58,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:43:58,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:58,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:58,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:43:58,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:43:58,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:43:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:59,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:59,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:59,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:59,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:59,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:59,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:59,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:59,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:59,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:43:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:59,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:59,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:59,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:43:59,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:59,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:59,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:59,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:59,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:59,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 23:43:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:59,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:59,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:59,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:43:59,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:59,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:59,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:59,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:59,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:59,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:43:59,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960607071] [2020-10-13 23:43:59,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:59,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:43:59,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084177787] [2020-10-13 23:43:59,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:43:59,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:59,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:43:59,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:43:59,142 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2020-10-13 23:43:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:59,471 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2020-10-13 23:43:59,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:43:59,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-10-13 23:43:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:59,472 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:43:59,473 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:43:59,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:43:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:43:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2020-10-13 23:43:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:43:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-13 23:43:59,487 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-10-13 23:43:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:59,487 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-13 23:43:59,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:43:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-13 23:43:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:43:59,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:59,488 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:59,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:43:59,489 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:59,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1492861402, now seen corresponding path program 5 times [2020-10-13 23:43:59,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:59,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572070468] [2020-10-13 23:43:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:04,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:44:04,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:04,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:44:04,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:04,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:04,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:44:04,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:04,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:44:04,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:04,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:04,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:04,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:04,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:04,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:04,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:04,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:04,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:04,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:04,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:04,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:04,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:44:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:04,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:04,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:04,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:04,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:04,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:04,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:04,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:44:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:04,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:04,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:04,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:04,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:04,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:04,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-13 23:44:04,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572070468] [2020-10-13 23:44:04,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:04,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:44:04,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074169790] [2020-10-13 23:44:04,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:44:04,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:04,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:44:04,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:44:04,694 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 18 states. [2020-10-13 23:44:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:05,021 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-10-13 23:44:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:44:05,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-13 23:44:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:05,023 INFO L225 Difference]: With dead ends: 141 [2020-10-13 23:44:05,023 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:44:05,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:44:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:44:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-10-13 23:44:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:44:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-13 23:44:05,048 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2020-10-13 23:44:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:05,048 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-13 23:44:05,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:44:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-13 23:44:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:44:05,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:05,050 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:05,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:44:05,050 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1265129925, now seen corresponding path program 6 times [2020-10-13 23:44:05,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:05,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105123221] [2020-10-13 23:44:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:05,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:05,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:44:10,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:44:10,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:44:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:44:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:10,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:10,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:10,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:10,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:10,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:10,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:44:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:10,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:10,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:10,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:10,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:10,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:44:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:10,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:10,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:44:10,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:10,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-13 23:44:10,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105123221] [2020-10-13 23:44:10,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:10,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:44:10,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041484156] [2020-10-13 23:44:10,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:44:10,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:44:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:44:10,277 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 19 states. [2020-10-13 23:44:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:10,612 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2020-10-13 23:44:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:44:10,613 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-13 23:44:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:10,614 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:44:10,614 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 23:44:10,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:44:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 23:44:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 64. [2020-10-13 23:44:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:44:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 23:44:10,649 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2020-10-13 23:44:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:10,651 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 23:44:10,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:44:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 23:44:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:44:10,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:10,652 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:10,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:44:10,653 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:10,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1484147462, now seen corresponding path program 7 times [2020-10-13 23:44:10,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:10,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296013392] [2020-10-13 23:44:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:10,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:15,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:15,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:44:15,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:15,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 23:44:15,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:15,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:44:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:44:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:44:15,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:15,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:15,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:15,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:15,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:15,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:15,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:15,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:15,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:15,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:15,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:15,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:44:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:15,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:15,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:15,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:15,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:15,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:15,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:15,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:15,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:15,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:15,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:15,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:15,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:44:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:15,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:15,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:15,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:15,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:15,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:15,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:15,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:15,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:15,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:15,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:15,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:44:15,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296013392] [2020-10-13 23:44:15,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:15,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:44:15,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342760804] [2020-10-13 23:44:15,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:44:15,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:15,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:44:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:44:15,965 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2020-10-13 23:44:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:16,348 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-10-13 23:44:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:44:16,349 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-10-13 23:44:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:16,350 INFO L225 Difference]: With dead ends: 153 [2020-10-13 23:44:16,350 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:44:16,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:44:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:44:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2020-10-13 23:44:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:44:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 23:44:16,362 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2020-10-13 23:44:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:16,363 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 23:44:16,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:44:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 23:44:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:44:16,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:16,364 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:16,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:44:16,364 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash -889038107, now seen corresponding path program 8 times [2020-10-13 23:44:16,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:16,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870016768] [2020-10-13 23:44:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:16,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:21,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:21,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:44:21,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:21,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:44:21,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:21,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:21,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:44:21,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:21,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:44:21,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:21,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:21,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:21,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:21,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:21,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:21,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:21,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:21,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:21,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:21,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:21,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:21,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:44:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:21,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:21,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:21,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:21,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:21,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:44:21,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:21,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:21,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:21,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 23:44:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:21,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:21,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:21,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:21,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:21,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:21,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:21,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:21,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:21,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:21,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:21,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-10-13 23:44:21,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870016768] [2020-10-13 23:44:21,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:21,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:44:21,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950767738] [2020-10-13 23:44:21,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:44:21,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:21,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:44:21,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:44:21,619 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 21 states. [2020-10-13 23:44:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:22,008 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2020-10-13 23:44:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:44:22,009 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2020-10-13 23:44:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:22,012 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:44:22,012 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 23:44:22,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:44:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 23:44:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 68. [2020-10-13 23:44:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:44:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 23:44:22,035 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2020-10-13 23:44:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:22,035 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 23:44:22,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:44:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 23:44:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:44:22,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:22,037 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:22,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:44:22,037 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:22,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2143166490, now seen corresponding path program 9 times [2020-10-13 23:44:22,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:22,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487028910] [2020-10-13 23:44:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:22,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:22,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:44:27,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:27,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:44:27,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:44:27,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:44:27,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:44:27,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:27,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:27,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:27,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:27,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:27,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:27,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:27,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:27,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:27,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:44:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:27,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:27,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:27,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:27,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:27,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:27,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:27,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:44:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:27,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:27,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:27,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:27,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:27,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:27,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:27,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 23:44:27,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487028910] [2020-10-13 23:44:27,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:27,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:44:27,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590535966] [2020-10-13 23:44:27,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:44:27,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:44:27,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:44:27,353 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 22 states. [2020-10-13 23:44:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:27,748 INFO L93 Difference]: Finished difference Result 165 states and 187 transitions. [2020-10-13 23:44:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:44:27,749 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-13 23:44:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:27,751 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:44:27,751 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 23:44:27,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:44:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 23:44:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 70. [2020-10-13 23:44:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:44:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 23:44:27,770 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2020-10-13 23:44:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:27,770 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 23:44:27,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:44:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 23:44:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:44:27,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:27,771 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:27,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:44:27,771 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash -583379963, now seen corresponding path program 10 times [2020-10-13 23:44:27,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:27,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937057649] [2020-10-13 23:44:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:27,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:32,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:44:32,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:33,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:33,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:33,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:33,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:33,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:33,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 23:44:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:33,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:33,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:33,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:33,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:33,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:44:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:33,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:33,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:33,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:33,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:33,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:33,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-10-13 23:44:33,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937057649] [2020-10-13 23:44:33,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:33,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:44:33,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124704252] [2020-10-13 23:44:33,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:44:33,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:44:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:44:33,085 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 23 states. [2020-10-13 23:44:33,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:33,510 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2020-10-13 23:44:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:44:33,510 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-10-13 23:44:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:33,511 INFO L225 Difference]: With dead ends: 171 [2020-10-13 23:44:33,512 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:44:33,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:44:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:44:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 72. [2020-10-13 23:44:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:44:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-13 23:44:33,525 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 67 [2020-10-13 23:44:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:33,526 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-13 23:44:33,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:44:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-13 23:44:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:44:33,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:33,527 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:33,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:44:33,527 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash 354778310, now seen corresponding path program 11 times [2020-10-13 23:44:33,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:33,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072533923] [2020-10-13 23:44:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:38,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:38,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:44:38,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:38,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:44:38,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:38,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:44:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:44:38,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:38,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:38,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:38,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:38,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:38,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:38,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:38,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:38,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:38,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:38,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:44:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:38,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:38,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:38,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:38,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:38,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:38,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:38,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:38,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:38,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:38,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:38,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:38,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:44:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:38,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:38,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:38,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:38,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:38,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:38,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:38,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:38,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:38,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:38,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:38,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-13 23:44:38,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072533923] [2020-10-13 23:44:38,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:38,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:44:38,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291482114] [2020-10-13 23:44:38,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:44:38,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:44:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:44:38,872 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 24 states. [2020-10-13 23:44:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:39,297 INFO L93 Difference]: Finished difference Result 177 states and 201 transitions. [2020-10-13 23:44:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:44:39,297 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-13 23:44:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:39,299 INFO L225 Difference]: With dead ends: 177 [2020-10-13 23:44:39,299 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 23:44:39,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:44:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 23:44:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 74. [2020-10-13 23:44:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:44:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 23:44:39,313 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2020-10-13 23:44:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:39,313 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 23:44:39,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:44:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 23:44:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:44:39,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:39,314 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:39,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:44:39,315 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1349368539, now seen corresponding path program 12 times [2020-10-13 23:44:39,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:39,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810414285] [2020-10-13 23:44:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:39,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:39,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:44,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:44:44,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:44,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:44:44,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:44,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:44:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:44:44,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:44,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:44,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:44,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:44,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:44,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:44,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:44,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:44,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:44:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:44,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:44,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:44,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:44,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:44,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:44,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:44,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 23:44:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:44,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:44,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:44,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:44,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:44,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:44,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:44,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 23:44:44,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810414285] [2020-10-13 23:44:44,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:44,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:44:44,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038623806] [2020-10-13 23:44:44,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:44:44,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:44,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:44:44,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:44:44,675 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 25 states. [2020-10-13 23:44:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:45,225 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2020-10-13 23:44:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:44:45,225 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2020-10-13 23:44:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:45,227 INFO L225 Difference]: With dead ends: 183 [2020-10-13 23:44:45,227 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 23:44:45,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:44:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 23:44:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 76. [2020-10-13 23:44:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:44:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 23:44:45,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2020-10-13 23:44:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:45,243 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 23:44:45,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:44:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 23:44:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:44:45,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:45,244 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:45,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:44:45,245 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash -966843994, now seen corresponding path program 13 times [2020-10-13 23:44:45,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:45,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143687721] [2020-10-13 23:44:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:45,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:45,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:50,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:44:50,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:44:50,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:50,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:50,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:44:50,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:44:50,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:44:50,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:50,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:50,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:50,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:50,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:50,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:50,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:50,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:50,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:50,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:50,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:44:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:50,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:50,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:50,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:50,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:50,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:50,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:50,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:50,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:50,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:50,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:44:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:50,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:50,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:50,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:50,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:50,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:50,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:50,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:50,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:50,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:50,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 4 proven. 253 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-13 23:44:50,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143687721] [2020-10-13 23:44:50,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:50,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:44:50,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913081693] [2020-10-13 23:44:50,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:44:50,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:50,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:44:50,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:44:50,661 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2020-10-13 23:44:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:51,231 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2020-10-13 23:44:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:44:51,232 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-10-13 23:44:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:51,234 INFO L225 Difference]: With dead ends: 189 [2020-10-13 23:44:51,234 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:44:51,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:44:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:44:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 78. [2020-10-13 23:44:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:44:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-13 23:44:51,253 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-10-13 23:44:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:51,254 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-13 23:44:51,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:44:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-13 23:44:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:44:51,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:51,255 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:51,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:44:51,255 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:51,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2029244859, now seen corresponding path program 14 times [2020-10-13 23:44:51,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:51,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477029417] [2020-10-13 23:44:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:51,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:56,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:44:56,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:56,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:44:56,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:56,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:56,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:44:56,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:56,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:44:56,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:56,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:56,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:56,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:56,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:56,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:44:56,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:56,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:56,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:56,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:56,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:56,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:56,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 23:44:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:56,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:56,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:56,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:56,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:56,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:56,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:56,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:56,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:56,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:56,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:44:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:56,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:56,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:56,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:44:56,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:56,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:56,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:44:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 4 proven. 276 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 23:44:56,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477029417] [2020-10-13 23:44:56,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:56,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:44:56,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070471710] [2020-10-13 23:44:56,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:44:56,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:56,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:44:56,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:44:56,705 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 27 states. [2020-10-13 23:44:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:57,364 INFO L93 Difference]: Finished difference Result 195 states and 222 transitions. [2020-10-13 23:44:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:44:57,366 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2020-10-13 23:44:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:57,367 INFO L225 Difference]: With dead ends: 195 [2020-10-13 23:44:57,367 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 23:44:57,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:44:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 23:44:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 80. [2020-10-13 23:44:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:44:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 23:44:57,384 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 75 [2020-10-13 23:44:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:57,385 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 23:44:57,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:44:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 23:44:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:44:57,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:57,386 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:57,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:44:57,386 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash -609431930, now seen corresponding path program 15 times [2020-10-13 23:44:57,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:57,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475526824] [2020-10-13 23:44:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:57,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:45:02,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:02,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:02,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:02,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:02,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:45:02,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:02,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:02,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:02,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:45:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:02,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:02,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:02,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:02,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:02,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:45:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:02,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:02,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:02,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:02,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:02,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 4 proven. 300 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-10-13 23:45:02,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475526824] [2020-10-13 23:45:02,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:02,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:45:02,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804992372] [2020-10-13 23:45:02,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:45:02,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:02,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:45:02,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:45:02,845 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 28 states. [2020-10-13 23:45:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:03,607 INFO L93 Difference]: Finished difference Result 201 states and 229 transitions. [2020-10-13 23:45:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:45:03,607 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-10-13 23:45:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:03,609 INFO L225 Difference]: With dead ends: 201 [2020-10-13 23:45:03,609 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 23:45:03,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:45:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 23:45:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 82. [2020-10-13 23:45:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:45:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 23:45:03,626 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2020-10-13 23:45:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:03,626 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 23:45:03,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:45:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 23:45:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:45:03,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:03,627 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:03,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:45:03,627 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:03,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:03,628 INFO L82 PathProgramCache]: Analyzing trace with hash -534114459, now seen corresponding path program 16 times [2020-10-13 23:45:03,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:03,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053825244] [2020-10-13 23:45:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:03,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:08,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:08,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:45:08,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:08,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 23:45:08,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:08,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:45:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:45:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:09,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:09,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:09,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:09,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:09,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:09,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:09,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:09,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:09,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:09,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:09,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:09,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:45:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:09,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:09,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:09,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:09,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:09,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:45:09,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:09,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:09,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:09,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:09,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:09,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-13 23:45:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:09,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:09,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:09,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:09,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:09,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:09,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:09,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:09,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:09,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:09,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 4 proven. 325 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2020-10-13 23:45:09,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053825244] [2020-10-13 23:45:09,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:09,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:45:09,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39996223] [2020-10-13 23:45:09,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:45:09,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:45:09,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:45:09,174 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 29 states. [2020-10-13 23:45:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:10,035 INFO L93 Difference]: Finished difference Result 207 states and 236 transitions. [2020-10-13 23:45:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:45:10,035 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-10-13 23:45:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:10,037 INFO L225 Difference]: With dead ends: 207 [2020-10-13 23:45:10,037 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:45:10,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:45:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:45:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 84. [2020-10-13 23:45:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:45:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-13 23:45:10,056 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2020-10-13 23:45:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:10,056 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-13 23:45:10,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:45:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-13 23:45:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:45:10,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:10,058 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:10,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:45:10,058 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash 357335910, now seen corresponding path program 17 times [2020-10-13 23:45:10,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:10,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991816996] [2020-10-13 23:45:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:10,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:15,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:45:15,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:45:15,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:15,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:45:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:45:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:45:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:15,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:15,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:15,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:15,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:15,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:15,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:15,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:15,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:15,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:15,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:15,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:45:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:15,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:15,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:15,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:15,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:15,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:15,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 23:45:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:15,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:15,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:15,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:15,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:15,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 4 proven. 351 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2020-10-13 23:45:15,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991816996] [2020-10-13 23:45:15,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:15,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:45:15,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117762690] [2020-10-13 23:45:15,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:45:15,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:45:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:45:15,548 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 30 states. [2020-10-13 23:45:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:16,276 INFO L93 Difference]: Finished difference Result 213 states and 243 transitions. [2020-10-13 23:45:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:45:16,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-10-13 23:45:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:16,278 INFO L225 Difference]: With dead ends: 213 [2020-10-13 23:45:16,278 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 23:45:16,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:45:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 23:45:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 86. [2020-10-13 23:45:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:45:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 23:45:16,295 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 81 [2020-10-13 23:45:16,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:16,296 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 23:45:16,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:45:16,296 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 23:45:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:45:16,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:16,297 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:16,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:45:16,297 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:16,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1897011067, now seen corresponding path program 18 times [2020-10-13 23:45:16,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:16,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033801751] [2020-10-13 23:45:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:16,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:16,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:21,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:45:21,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:21,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 23:45:21,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:21,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:21,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:45:21,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:45:21,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:45:21,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:21,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:21,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:21,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:21,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:21,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:21,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:21,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:21,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:21,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:21,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 23:45:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:21,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:21,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:21,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:21,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:21,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:21,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:21,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:21,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:21,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:21,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:21,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-13 23:45:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:21,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:21,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:21,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:21,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:21,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:21,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 4 proven. 378 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2020-10-13 23:45:21,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033801751] [2020-10-13 23:45:21,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:21,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:45:21,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962253983] [2020-10-13 23:45:21,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:45:21,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:21,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:45:21,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:45:21,834 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 31 states. [2020-10-13 23:45:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:22,591 INFO L93 Difference]: Finished difference Result 219 states and 250 transitions. [2020-10-13 23:45:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:45:22,592 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2020-10-13 23:45:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:22,594 INFO L225 Difference]: With dead ends: 219 [2020-10-13 23:45:22,594 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 23:45:22,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:45:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 23:45:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 88. [2020-10-13 23:45:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:45:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-13 23:45:22,617 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2020-10-13 23:45:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:22,617 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-13 23:45:22,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:45:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-13 23:45:22,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 23:45:22,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:22,618 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:22,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:45:22,618 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1946402746, now seen corresponding path program 19 times [2020-10-13 23:45:22,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:22,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392089590] [2020-10-13 23:45:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:22,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:22,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:27,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:27,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:45:27,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:27,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 23:45:27,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:27,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:45:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:45:27,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:28,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:28,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:28,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:28,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:28,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:28,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:28,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:28,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:28,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:28,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 23:45:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:28,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:28,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:28,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:28,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:28,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:28,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:28,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:28,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:28,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:28,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:28,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 23:45:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:28,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:28,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:28,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:28,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:28,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:28,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:28,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:28,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:28,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 4 proven. 406 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-13 23:45:28,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392089590] [2020-10-13 23:45:28,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:28,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:45:28,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63192489] [2020-10-13 23:45:28,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:45:28,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:28,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:45:28,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:45:28,201 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 32 states. [2020-10-13 23:45:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:28,975 INFO L93 Difference]: Finished difference Result 225 states and 257 transitions. [2020-10-13 23:45:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:45:28,975 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 85 [2020-10-13 23:45:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:28,976 INFO L225 Difference]: With dead ends: 225 [2020-10-13 23:45:28,977 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 23:45:28,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:45:28,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 23:45:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 90. [2020-10-13 23:45:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:45:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-13 23:45:29,001 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2020-10-13 23:45:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:29,001 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-13 23:45:29,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:45:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-13 23:45:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:45:29,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:29,003 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:29,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:45:29,003 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash -556156507, now seen corresponding path program 20 times [2020-10-13 23:45:29,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:29,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885489934] [2020-10-13 23:45:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:29,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:34,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:34,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:45:34,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-13 23:45:34,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:34,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:45:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:45:34,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:34,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:34,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:34,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:34,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:34,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:34,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:34,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:34,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:34,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:34,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 23:45:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:34,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:34,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:34,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:34,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:34,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:34,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:34,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:34,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:34,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-13 23:45:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:34,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:34,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:34,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:34,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:34,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:34,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:34,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:34,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:34,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 4 proven. 435 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-10-13 23:45:34,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885489934] [2020-10-13 23:45:34,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:34,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:45:34,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132376268] [2020-10-13 23:45:34,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:45:34,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:34,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:45:34,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:45:34,655 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 33 states. [2020-10-13 23:45:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:35,661 INFO L93 Difference]: Finished difference Result 231 states and 264 transitions. [2020-10-13 23:45:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:45:35,662 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 87 [2020-10-13 23:45:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:35,663 INFO L225 Difference]: With dead ends: 231 [2020-10-13 23:45:35,663 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 23:45:35,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:45:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 23:45:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 92. [2020-10-13 23:45:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:45:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-13 23:45:35,689 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2020-10-13 23:45:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:35,689 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-13 23:45:35,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:45:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-13 23:45:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:45:35,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:35,690 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:35,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:45:35,691 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:35,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1862662874, now seen corresponding path program 21 times [2020-10-13 23:45:35,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:35,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45856409] [2020-10-13 23:45:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:35,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:40,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:40,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:45:40,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:40,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:45:40,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:40,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:45:40,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:45:40,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:45:40,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:41,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:41,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:41,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:41,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:41,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:41,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:41,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:41,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 23:45:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:41,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:41,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:41,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:41,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:41,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:41,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:41,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:41,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:41,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:41,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-13 23:45:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:41,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:41,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:41,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:41,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:41,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:41,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:41,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:41,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:41,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:41,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 4 proven. 465 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-10-13 23:45:41,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45856409] [2020-10-13 23:45:41,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:41,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:45:41,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015171573] [2020-10-13 23:45:41,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:45:41,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:45:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:45:41,536 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 34 states. [2020-10-13 23:45:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:42,869 INFO L93 Difference]: Finished difference Result 237 states and 271 transitions. [2020-10-13 23:45:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:45:42,870 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 89 [2020-10-13 23:45:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:42,872 INFO L225 Difference]: With dead ends: 237 [2020-10-13 23:45:42,872 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 23:45:42,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:45:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 23:45:42,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 94. [2020-10-13 23:45:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:45:42,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-13 23:45:42,899 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2020-10-13 23:45:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:42,899 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-13 23:45:42,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:45:42,900 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-13 23:45:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:45:42,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:42,901 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:42,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:45:42,901 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1292926267, now seen corresponding path program 22 times [2020-10-13 23:45:42,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:42,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673631783] [2020-10-13 23:45:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:43,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:47,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:47,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:45:47,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:47,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:45:47,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:47,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:45:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:45:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:48,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:48,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:48,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:48,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:48,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:48,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:48,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:48,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:48,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:48,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:48,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:48,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:48,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-13 23:45:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:48,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:48,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:48,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:48,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:48,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:48,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:48,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:48,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-13 23:45:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:48,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:48,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:48,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:48,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:48,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:48,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:48,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:48,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:48,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 4 proven. 496 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-13 23:45:48,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673631783] [2020-10-13 23:45:48,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:48,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:45:48,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564893609] [2020-10-13 23:45:48,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:45:48,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:45:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:45:48,660 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 35 states. [2020-10-13 23:45:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:49,783 INFO L93 Difference]: Finished difference Result 243 states and 278 transitions. [2020-10-13 23:45:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:45:49,784 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 91 [2020-10-13 23:45:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:49,786 INFO L225 Difference]: With dead ends: 243 [2020-10-13 23:45:49,786 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:45:49,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:45:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:45:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 96. [2020-10-13 23:45:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:45:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-13 23:45:49,814 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2020-10-13 23:45:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:49,815 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-13 23:45:49,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:45:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-13 23:45:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 23:45:49,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:49,816 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:49,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:45:49,816 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:49,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1912352250, now seen corresponding path program 23 times [2020-10-13 23:45:49,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:49,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572662420] [2020-10-13 23:45:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:49,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:54,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:54,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:45:54,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:54,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:45:54,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:54,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:54,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:45:54,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:45:54,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:45:54,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:55,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:55,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:55,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:55,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:55,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:55,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:55,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:55,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:55,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:55,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:55,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:55,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:55,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 23:45:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:55,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:55,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:55,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:55,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:55,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:55,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:55,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:55,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 23:45:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:55,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:55,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:55,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:55,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:55,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:55,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:55,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 4 proven. 528 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-10-13 23:45:55,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572662420] [2020-10-13 23:45:55,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:55,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:45:55,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80652938] [2020-10-13 23:45:55,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:45:55,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:45:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:45:55,536 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 36 states. [2020-10-13 23:45:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:56,607 INFO L93 Difference]: Finished difference Result 249 states and 285 transitions. [2020-10-13 23:45:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:45:56,608 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 93 [2020-10-13 23:45:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:56,609 INFO L225 Difference]: With dead ends: 249 [2020-10-13 23:45:56,609 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 23:45:56,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:45:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 23:45:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 98. [2020-10-13 23:45:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:45:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-13 23:45:56,642 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 93 [2020-10-13 23:45:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:56,642 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-13 23:45:56,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:45:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-13 23:45:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:45:56,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:56,644 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:56,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:45:56,644 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:56,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:56,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1515109403, now seen corresponding path program 24 times [2020-10-13 23:45:56,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:56,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755884658] [2020-10-13 23:45:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:56,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:56,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:01,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:01,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 23:46:01,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:01,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:46:01,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:01,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:01,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:46:01,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:01,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:46:01,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:02,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:02,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:02,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:02,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:02,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:02,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 23:46:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:02,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:02,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:02,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:02,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:02,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:02,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:02,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:02,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:02,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:02,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:02,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:02,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-13 23:46:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:02,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:02,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:02,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:02,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:02,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:02,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:02,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 4 proven. 561 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2020-10-13 23:46:02,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755884658] [2020-10-13 23:46:02,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:02,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:46:02,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941911058] [2020-10-13 23:46:02,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:46:02,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:46:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:46:02,390 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 37 states. [2020-10-13 23:46:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:03,605 INFO L93 Difference]: Finished difference Result 255 states and 292 transitions. [2020-10-13 23:46:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:46:03,605 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 95 [2020-10-13 23:46:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:03,607 INFO L225 Difference]: With dead ends: 255 [2020-10-13 23:46:03,608 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 23:46:03,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:46:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 23:46:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 100. [2020-10-13 23:46:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:46:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-13 23:46:03,660 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2020-10-13 23:46:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:03,661 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-13 23:46:03,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:46:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-13 23:46:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:46:03,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:03,665 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:03,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:46:03,665 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:03,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:03,666 INFO L82 PathProgramCache]: Analyzing trace with hash -447240474, now seen corresponding path program 25 times [2020-10-13 23:46:03,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:03,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506136389] [2020-10-13 23:46:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:08,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:08,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:46:08,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:08,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:46:08,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:08,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:08,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:46:08,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:46:08,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:46:08,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:09,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:09,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:09,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:09,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:09,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:09,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:09,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:09,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:09,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:09,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:09,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:09,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 23:46:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:09,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:09,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:09,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:09,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:09,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:09,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:09,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:09,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-13 23:46:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:09,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:09,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:09,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:09,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:09,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:09,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:09,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 4 proven. 595 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-10-13 23:46:09,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506136389] [2020-10-13 23:46:09,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:09,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:46:09,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753363918] [2020-10-13 23:46:09,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:46:09,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:09,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:46:09,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:46:09,459 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 38 states. [2020-10-13 23:46:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:10,905 INFO L93 Difference]: Finished difference Result 261 states and 299 transitions. [2020-10-13 23:46:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:46:10,905 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 97 [2020-10-13 23:46:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:10,907 INFO L225 Difference]: With dead ends: 261 [2020-10-13 23:46:10,907 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 23:46:10,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:46:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 23:46:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 102. [2020-10-13 23:46:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:46:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-13 23:46:10,940 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 97 [2020-10-13 23:46:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:10,940 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-13 23:46:10,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:46:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-13 23:46:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:46:10,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:10,942 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:10,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:46:10,942 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 690027781, now seen corresponding path program 26 times [2020-10-13 23:46:10,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:10,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428919664] [2020-10-13 23:46:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:10,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:11,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:15,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:15,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:46:15,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:15,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:46:15,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:15,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:46:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 23:46:15,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:46:15,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:16,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:16,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:16,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:16,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:16,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:16,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:16,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:16,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:16,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:16,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:16,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:16,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 23:46:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:16,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:16,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:16,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:16,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:16,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:16,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:16,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:16,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:16,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:16,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:16,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:16,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-13 23:46:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:16,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:16,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:16,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:16,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:16,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:16,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:16,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:16,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 4 proven. 630 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2020-10-13 23:46:16,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428919664] [2020-10-13 23:46:16,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:16,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:46:16,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311349486] [2020-10-13 23:46:16,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:46:16,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:16,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:46:16,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:46:16,753 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 39 states. [2020-10-13 23:46:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:18,439 INFO L93 Difference]: Finished difference Result 267 states and 306 transitions. [2020-10-13 23:46:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:46:18,440 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 99 [2020-10-13 23:46:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:18,441 INFO L225 Difference]: With dead ends: 267 [2020-10-13 23:46:18,441 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 23:46:18,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:46:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 23:46:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 104. [2020-10-13 23:46:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 23:46:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-13 23:46:18,481 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 99 [2020-10-13 23:46:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:18,481 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-13 23:46:18,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:46:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-13 23:46:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:46:18,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:18,482 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:18,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:46:18,483 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:18,483 INFO L82 PathProgramCache]: Analyzing trace with hash -776764474, now seen corresponding path program 27 times [2020-10-13 23:46:18,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:18,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918335014] [2020-10-13 23:46:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:18,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:19,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:23,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 23:46:23,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:23,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:46:23,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:23,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:23,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:46:23,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:23,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:46:23,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:24,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:24,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:24,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:24,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:24,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:24,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:24,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:24,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:24,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:24,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-13 23:46:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:24,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:24,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:24,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:24,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:24,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:24,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:24,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:24,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:24,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:24,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-13 23:46:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:24,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:24,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:24,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:24,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:24,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:24,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:24,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:24,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:24,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:24,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 4 proven. 666 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2020-10-13 23:46:24,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918335014] [2020-10-13 23:46:24,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:24,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:46:24,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903124543] [2020-10-13 23:46:24,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:46:24,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:46:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:46:24,344 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 40 states. [2020-10-13 23:46:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:25,961 INFO L93 Difference]: Finished difference Result 273 states and 313 transitions. [2020-10-13 23:46:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:46:25,961 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 101 [2020-10-13 23:46:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:25,963 INFO L225 Difference]: With dead ends: 273 [2020-10-13 23:46:25,963 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 23:46:25,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:46:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 23:46:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 106. [2020-10-13 23:46:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:46:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-13 23:46:25,993 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2020-10-13 23:46:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:25,993 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-13 23:46:25,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:46:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-13 23:46:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:46:25,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:25,994 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:25,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:46:25,994 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:25,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:25,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1497321947, now seen corresponding path program 28 times [2020-10-13 23:46:25,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:25,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977713867] [2020-10-13 23:46:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:26,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:31,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:31,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:46:31,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-13 23:46:31,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:31,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:46:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:46:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:46:31,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:31,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:31,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:31,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:31,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:31,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:31,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:31,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:31,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:31,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:31,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-13 23:46:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:31,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:31,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:31,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:31,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:31,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:31,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:31,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:31,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:31,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:31,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:31,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:31,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-13 23:46:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:31,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:31,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:31,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:31,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:31,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:31,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 4 proven. 703 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2020-10-13 23:46:31,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977713867] [2020-10-13 23:46:31,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:31,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:46:31,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458723295] [2020-10-13 23:46:31,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:46:31,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:46:31,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:46:31,954 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 41 states. [2020-10-13 23:46:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:33,437 INFO L93 Difference]: Finished difference Result 279 states and 320 transitions. [2020-10-13 23:46:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:46:33,437 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 103 [2020-10-13 23:46:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:33,439 INFO L225 Difference]: With dead ends: 279 [2020-10-13 23:46:33,439 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 23:46:33,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:46:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 23:46:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 108. [2020-10-13 23:46:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:46:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-13 23:46:33,472 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 103 [2020-10-13 23:46:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:33,472 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-13 23:46:33,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:46:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-13 23:46:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 23:46:33,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:33,473 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:33,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:46:33,473 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1180002470, now seen corresponding path program 29 times [2020-10-13 23:46:33,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:33,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563116443] [2020-10-13 23:46:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:34,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:38,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 23:46:38,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:38,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 23:46:38,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:38,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:38,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:46:38,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:38,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:46:38,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:39,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:39,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:39,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:39,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:39,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:39,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:39,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:39,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:39,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:39,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:39,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:39,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:39,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 23:46:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:39,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:39,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:39,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:39,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:39,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:39,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:39,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:39,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:39,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:39,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:39,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:39,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-13 23:46:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:39,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:39,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:39,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:39,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:39,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:39,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:39,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:39,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:39,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:39,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:39,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 4 proven. 741 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-10-13 23:46:39,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563116443] [2020-10-13 23:46:39,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:39,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:46:39,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398634919] [2020-10-13 23:46:39,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:46:39,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:46:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:46:39,454 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 42 states. [2020-10-13 23:46:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:41,585 INFO L93 Difference]: Finished difference Result 285 states and 327 transitions. [2020-10-13 23:46:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:46:41,586 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 105 [2020-10-13 23:46:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:41,588 INFO L225 Difference]: With dead ends: 285 [2020-10-13 23:46:41,588 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 23:46:41,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:46:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 23:46:41,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 110. [2020-10-13 23:46:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:46:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-13 23:46:41,625 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 105 [2020-10-13 23:46:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:41,625 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-13 23:46:41,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:46:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-13 23:46:41,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:46:41,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:41,626 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:41,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:46:41,626 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1617799355, now seen corresponding path program 30 times [2020-10-13 23:46:41,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:41,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093099413] [2020-10-13 23:46:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:41,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:42,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:46,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:46,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 23:46:46,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 23:46:46,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:46,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:46:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 23:46:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:46:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:47,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:47,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:47,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:47,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:47,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:47,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:47,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:47,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:47,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:47,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:47,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:47,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:47,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 23:46:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:47,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:47,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:47,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:47,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:47,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:47,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:47,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:47,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:47,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-13 23:46:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:47,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:47,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:47,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:47,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:47,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:47,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:47,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:47,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:47,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:47,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:47,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 4 proven. 780 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2020-10-13 23:46:47,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093099413] [2020-10-13 23:46:47,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:47,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:46:47,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405072566] [2020-10-13 23:46:47,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:46:47,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:46:47,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:46:47,674 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 43 states. [2020-10-13 23:46:49,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:49,758 INFO L93 Difference]: Finished difference Result 291 states and 334 transitions. [2020-10-13 23:46:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:46:49,759 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 107 [2020-10-13 23:46:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:49,760 INFO L225 Difference]: With dead ends: 291 [2020-10-13 23:46:49,760 INFO L226 Difference]: Without dead ends: 227 [2020-10-13 23:46:49,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:46:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-13 23:46:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 112. [2020-10-13 23:46:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:46:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-13 23:46:49,798 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2020-10-13 23:46:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:49,798 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-13 23:46:49,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:46:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-13 23:46:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 23:46:49,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:49,799 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:49,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:46:49,800 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:49,800 INFO L82 PathProgramCache]: Analyzing trace with hash -822389370, now seen corresponding path program 31 times [2020-10-13 23:46:49,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:49,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302103279] [2020-10-13 23:46:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:49,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:50,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking...