/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-programs/copysome2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 00:03:47,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 00:03:47,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 00:03:47,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 00:03:47,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 00:03:47,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 00:03:47,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 00:03:47,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 00:03:47,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 00:03:47,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 00:03:47,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 00:03:47,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 00:03:47,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 00:03:47,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 00:03:47,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 00:03:47,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 00:03:47,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 00:03:47,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 00:03:47,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 00:03:47,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 00:03:47,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 00:03:47,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 00:03:47,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 00:03:47,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 00:03:47,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 00:03:47,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 00:03:47,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 00:03:47,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 00:03:47,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 00:03:47,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 00:03:47,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 00:03:47,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 00:03:47,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 00:03:47,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 00:03:47,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 00:03:47,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 00:03:47,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 00:03:47,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 00:03:47,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 00:03:47,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 00:03:47,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 00:03:47,773 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 [2020-10-14 00:03:47,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 00:03:47,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 00:03:47,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 00:03:47,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 00:03:47,822 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 00:03:47,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 00:03:47,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 00:03:47,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 00:03:47,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 00:03:47,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 00:03:47,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 00:03:47,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 00:03:47,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 00:03:47,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 00:03:47,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 00:03:47,824 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 00:03:47,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 00:03:47,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 00:03:47,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 00:03:47,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 00:03:47,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 00:03:47,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:03:47,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 00:03:47,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 00:03:47,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 00:03:47,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 00:03:47,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 00:03:47,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 00:03:47,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 00:03:47,832 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; [2020-10-14 00:03:48,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 00:03:48,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 00:03:48,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 00:03:48,180 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 00:03:48,181 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 00:03:48,181 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-2.i [2020-10-14 00:03:48,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/547f8c05b/6fb21e1580524824a90f2cebb89ec003/FLAG5498b9940 [2020-10-14 00:03:48,693 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 00:03:48,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome2-2.i [2020-10-14 00:03:48,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/547f8c05b/6fb21e1580524824a90f2cebb89ec003/FLAG5498b9940 [2020-10-14 00:03:49,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/547f8c05b/6fb21e1580524824a90f2cebb89ec003 [2020-10-14 00:03:49,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 00:03:49,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 00:03:49,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 00:03:49,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 00:03:49,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 00:03:49,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb9d797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49, skipping insertion in model container [2020-10-14 00:03:49,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 00:03:49,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 00:03:49,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:03:49,297 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 00:03:49,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:03:49,338 INFO L208 MainTranslator]: Completed translation [2020-10-14 00:03:49,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49 WrapperNode [2020-10-14 00:03:49,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 00:03:49,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 00:03:49,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 00:03:49,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 00:03:49,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (1/1) ... [2020-10-14 00:03:49,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 00:03:49,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 00:03:49,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 00:03:49,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 00:03:49,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (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 [2020-10-14 00:03:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 00:03:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 00:03:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 00:03:49,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 00:03:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 00:03:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 00:03:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 00:03:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 00:03:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 00:03:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 00:03:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 00:03:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 00:03:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 00:03:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 00:03:49,867 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 00:03:49,868 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 00:03:49,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:03:49 BoogieIcfgContainer [2020-10-14 00:03:49,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 00:03:49,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 00:03:49,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 00:03:49,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 00:03:49,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 12:03:49" (1/3) ... [2020-10-14 00:03:49,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297c3303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:03:49, skipping insertion in model container [2020-10-14 00:03:49,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:03:49" (2/3) ... [2020-10-14 00:03:49,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297c3303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:03:49, skipping insertion in model container [2020-10-14 00:03:49,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:03:49" (3/3) ... [2020-10-14 00:03:49,880 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2020-10-14 00:03:49,890 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 00:03:49,897 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 00:03:49,911 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 00:03:49,935 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 00:03:49,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 00:03:49,935 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 00:03:49,936 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 00:03:49,936 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 00:03:49,936 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 00:03:49,936 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 00:03:49,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 00:03:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-14 00:03:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 00:03:49,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:49,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:49,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash 696803616, now seen corresponding path program 1 times [2020-10-14 00:03:49,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:49,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027742823] [2020-10-14 00:03:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:50,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 00:03:50,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:03:50,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-14 00:03:50,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:50,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 00:03:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:50,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 00:03:50,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:50,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:50,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:50,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 00:03:50,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:50,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:50,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:50,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:50,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:50,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 00:03:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:50,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027742823] [2020-10-14 00:03:50,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:03:50,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 00:03:50,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379943000] [2020-10-14 00:03:50,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 00:03:50,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:50,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 00:03:50,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 00:03:50,435 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-14 00:03:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:50,546 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-14 00:03:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 00:03:50,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-14 00:03:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:50,557 INFO L225 Difference]: With dead ends: 56 [2020-10-14 00:03:50,557 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 00:03:50,561 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 [2020-10-14 00:03:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 00:03:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 00:03:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 00:03:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-14 00:03:50,603 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2020-10-14 00:03:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:50,604 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-14 00:03:50,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 00:03:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-14 00:03:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 00:03:50,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:50,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:50,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 00:03:50,606 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 123133892, now seen corresponding path program 1 times [2020-10-14 00:03:50,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:50,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541087951] [2020-10-14 00:03:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:50,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:50,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 00:03:50,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:03:50,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-14 00:03:50,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:50,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:03:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 00:03:50,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:03:50,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:50,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:50,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:50,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:50,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:50,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:03:50,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:50,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:50,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:50,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:50,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541087951] [2020-10-14 00:03:50,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:03:50,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 00:03:50,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787172757] [2020-10-14 00:03:50,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 00:03:50,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 00:03:50,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:03:50,946 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-10-14 00:03:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:51,077 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-10-14 00:03:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 00:03:51,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 00:03:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:51,079 INFO L225 Difference]: With dead ends: 54 [2020-10-14 00:03:51,079 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 00:03:51,081 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 [2020-10-14 00:03:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 00:03:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-14 00:03:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 00:03:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 00:03:51,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2020-10-14 00:03:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:51,089 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 00:03:51,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 00:03:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 00:03:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 00:03:51,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:51,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:51,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 00:03:51,091 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash -204061721, now seen corresponding path program 1 times [2020-10-14 00:03:51,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:51,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442509865] [2020-10-14 00:03:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:51,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:51,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:51,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:51,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:51,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:51,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:51,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:53,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:53,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 00:03:53,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 00:03:53,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2872 [2020-10-14 00:03:53,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:53,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:53,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:03:53,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 00:03:53,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:54,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:54,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:54,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:54,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:54,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:54,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:54,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:54,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 00:03:54,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442509865] [2020-10-14 00:03:54,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:54,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:03:54,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934770607] [2020-10-14 00:03:54,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:03:54,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:03:54,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:03:54,046 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-10-14 00:03:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:54,205 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-10-14 00:03:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 00:03:54,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-14 00:03:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:54,209 INFO L225 Difference]: With dead ends: 64 [2020-10-14 00:03:54,209 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 00:03:54,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:03:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 00:03:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-14 00:03:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 00:03:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 00:03:54,220 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2020-10-14 00:03:54,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:54,221 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 00:03:54,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:03:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 00:03:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 00:03:54,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:54,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:54,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 00:03:54,223 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash -577529698, now seen corresponding path program 1 times [2020-10-14 00:03:54,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:54,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967155777] [2020-10-14 00:03:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:57,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:59,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:59,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 00:03:59,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 00:03:59,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:03:59,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:59,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:03:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 00:03:59,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 00:03:59,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:59,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:59,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:59,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:59,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:59,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:59,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:59,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:59,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:59,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:59,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:59,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:59,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 00:03:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 00:03:59,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967155777] [2020-10-14 00:03:59,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:59,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:03:59,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113414722] [2020-10-14 00:03:59,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:03:59,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:59,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:03:59,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:03:59,345 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 6 states. [2020-10-14 00:03:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:59,518 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-10-14 00:03:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:03:59,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-14 00:03:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:59,521 INFO L225 Difference]: With dead ends: 74 [2020-10-14 00:03:59,521 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 00:03:59,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:03:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 00:03:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-10-14 00:03:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 00:03:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 00:03:59,536 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 33 [2020-10-14 00:03:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:59,536 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 00:03:59,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:03:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 00:03:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 00:03:59,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:59,538 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:59,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 00:03:59,538 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:59,539 INFO L82 PathProgramCache]: Analyzing trace with hash -319364260, now seen corresponding path program 1 times [2020-10-14 00:03:59,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:59,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512869284] [2020-10-14 00:03:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:59,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:59,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:59,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:59,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:59,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:59,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:59,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:00,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:00,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:04,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:04,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 00:04:04,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 00:04:04,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 00:04:04,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:04,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 00:04:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 00:04:04,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:04,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:04,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:04,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:04,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:04,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:04,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:04,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:04,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:04,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:04,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:04,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 00:04:04,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512869284] [2020-10-14 00:04:04,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:04:04,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 00:04:04,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267738762] [2020-10-14 00:04:04,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 00:04:04,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 00:04:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:04:04,621 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 5 states. [2020-10-14 00:04:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:04,745 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-10-14 00:04:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 00:04:04,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-14 00:04:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:04,747 INFO L225 Difference]: With dead ends: 64 [2020-10-14 00:04:04,747 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 00:04:04,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:04:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 00:04:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-14 00:04:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 00:04:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-14 00:04:04,764 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 33 [2020-10-14 00:04:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:04,764 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-14 00:04:04,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 00:04:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-14 00:04:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 00:04:04,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:04,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:04,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 00:04:04,769 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:04,769 INFO L82 PathProgramCache]: Analyzing trace with hash 240118752, now seen corresponding path program 1 times [2020-10-14 00:04:04,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:04,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78644568] [2020-10-14 00:04:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:04,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:04,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:04,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:05,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:08,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:08,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 00:04:08,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:04:08,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4046 [2020-10-14 00:04:08,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:08,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:04:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 00:04:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 00:04:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:08,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:08,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:08,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:08,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:08,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:08,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:08,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:08,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:08,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:08,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:08,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:08,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 00:04:08,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78644568] [2020-10-14 00:04:08,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:08,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:04:08,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314035794] [2020-10-14 00:04:08,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:04:08,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:08,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:04:08,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:04:08,878 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-14 00:04:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:09,025 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-10-14 00:04:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 00:04:09,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-14 00:04:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:09,027 INFO L225 Difference]: With dead ends: 88 [2020-10-14 00:04:09,027 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 00:04:09,028 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 [2020-10-14 00:04:09,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 00:04:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-14 00:04:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 00:04:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-14 00:04:09,035 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 33 [2020-10-14 00:04:09,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:09,036 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-14 00:04:09,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:04:09,036 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-14 00:04:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 00:04:09,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:09,038 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:09,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 00:04:09,039 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:09,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2113903879, now seen corresponding path program 2 times [2020-10-14 00:04:09,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:09,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630006419] [2020-10-14 00:04:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:09,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:10,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:10,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:10,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:14,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:14,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 00:04:14,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 00:04:14,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 00:04:14,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:14,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:14,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:04:14,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:14,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 00:04:14,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:14,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:14,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:14,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:14,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:14,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:14,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:14,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:14,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:14,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:14,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-14 00:04:14,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630006419] [2020-10-14 00:04:14,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:14,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:04:14,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837239444] [2020-10-14 00:04:14,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:04:14,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:14,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:04:14,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:04:14,131 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 7 states. [2020-10-14 00:04:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:14,313 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2020-10-14 00:04:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:04:14,314 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-14 00:04:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:14,315 INFO L225 Difference]: With dead ends: 83 [2020-10-14 00:04:14,316 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 00:04:14,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:04:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 00:04:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-14 00:04:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 00:04:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-14 00:04:14,330 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 41 [2020-10-14 00:04:14,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:14,332 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-14 00:04:14,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:04:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-14 00:04:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 00:04:14,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:14,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:14,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 00:04:14,337 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash -375625083, now seen corresponding path program 2 times [2020-10-14 00:04:14,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:14,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792564789] [2020-10-14 00:04:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:14,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:14,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:14,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:16,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:19,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 00:04:19,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:04:19,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 00:04:19,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:19,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:19,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:04:19,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 00:04:19,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 00:04:19,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:19,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:19,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:19,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:19,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:19,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:19,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:19,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:19,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:19,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:19,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:19,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 00:04:19,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792564789] [2020-10-14 00:04:19,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:19,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:04:19,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605456499] [2020-10-14 00:04:19,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:04:19,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:19,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:04:19,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:04:19,421 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 7 states. [2020-10-14 00:04:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:19,585 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2020-10-14 00:04:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:04:19,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-14 00:04:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:19,587 INFO L225 Difference]: With dead ends: 122 [2020-10-14 00:04:19,587 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 00:04:19,588 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 [2020-10-14 00:04:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 00:04:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-10-14 00:04:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 00:04:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-14 00:04:19,595 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 41 [2020-10-14 00:04:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:19,596 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-14 00:04:19,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:04:19,596 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-14 00:04:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 00:04:19,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:19,597 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:19,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 00:04:19,597 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:19,598 INFO L82 PathProgramCache]: Analyzing trace with hash 980350718, now seen corresponding path program 3 times [2020-10-14 00:04:19,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:19,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883654722] [2020-10-14 00:04:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:19,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:20,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:21,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:21,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:22,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:22,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:23,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:24,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:24,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 00:04:24,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 00:04:24,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 00:04:24,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:24,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:04:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 00:04:24,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:24,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:24,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:24,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:24,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:24,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:24,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 00:04:24,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:24,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:24,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:24,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 00:04:24,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883654722] [2020-10-14 00:04:24,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:24,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:04:24,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064994671] [2020-10-14 00:04:24,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:04:24,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:24,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:04:24,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:04:24,712 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 6 states. [2020-10-14 00:04:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:24,874 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-14 00:04:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:04:24,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-14 00:04:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:24,876 INFO L225 Difference]: With dead ends: 93 [2020-10-14 00:04:24,876 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 00:04:24,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:04:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 00:04:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-14 00:04:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 00:04:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-14 00:04:24,889 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 49 [2020-10-14 00:04:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:24,889 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-14 00:04:24,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:04:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-14 00:04:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 00:04:24,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:24,893 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:24,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 00:04:24,894 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:24,894 INFO L82 PathProgramCache]: Analyzing trace with hash -405852676, now seen corresponding path program 3 times [2020-10-14 00:04:24,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:24,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038992241] [2020-10-14 00:04:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:24,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:24,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:27,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:29,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:29,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 00:04:29,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:04:29,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 00:04:29,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:29,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:29,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 00:04:29,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 00:04:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 00:04:29,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:29,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:29,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:29,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:29,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:29,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:29,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:29,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:29,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:29,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:29,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:29,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:29,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-14 00:04:29,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038992241] [2020-10-14 00:04:29,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:29,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 00:04:29,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630456794] [2020-10-14 00:04:29,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 00:04:29,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 00:04:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:04:29,969 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 8 states. [2020-10-14 00:04:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:30,127 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-14 00:04:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 00:04:30,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-14 00:04:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:30,128 INFO L225 Difference]: With dead ends: 142 [2020-10-14 00:04:30,129 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 00:04:30,129 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 [2020-10-14 00:04:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 00:04:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-10-14 00:04:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 00:04:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-14 00:04:30,137 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2020-10-14 00:04:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:30,138 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-14 00:04:30,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 00:04:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-14 00:04:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 00:04:30,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:30,139 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:30,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 00:04:30,139 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:30,140 INFO L82 PathProgramCache]: Analyzing trace with hash 361646623, now seen corresponding path program 4 times [2020-10-14 00:04:30,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:30,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056404944] [2020-10-14 00:04:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:30,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:30,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:30,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:30,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:30,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:30,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:35,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:35,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 00:04:35,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:04:35,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 00:04:35,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:35,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 00:04:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 00:04:35,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:35,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:35,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:35,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:35,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:35,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:35,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:35,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:35,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:35,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-14 00:04:35,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056404944] [2020-10-14 00:04:35,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:35,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 00:04:35,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454372705] [2020-10-14 00:04:35,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 00:04:35,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 00:04:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:04:35,236 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 8 states. [2020-10-14 00:04:35,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:35,394 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2020-10-14 00:04:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 00:04:35,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-14 00:04:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:35,395 INFO L225 Difference]: With dead ends: 113 [2020-10-14 00:04:35,395 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 00:04:35,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:04:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 00:04:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2020-10-14 00:04:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 00:04:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-14 00:04:35,403 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 57 [2020-10-14 00:04:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:35,404 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-14 00:04:35,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 00:04:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-14 00:04:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 00:04:35,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:35,405 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:35,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 00:04:35,405 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:35,406 INFO L82 PathProgramCache]: Analyzing trace with hash 86887009, now seen corresponding path program 4 times [2020-10-14 00:04:35,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:35,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488955633] [2020-10-14 00:04:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:35,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:35,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:40,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:40,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 00:04:40,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:04:40,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 00:04:40,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:40,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 00:04:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 00:04:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 00:04:40,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:40,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:40,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:40,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:40,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:40,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:40,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:40,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:40,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:40,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-14 00:04:40,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488955633] [2020-10-14 00:04:40,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:40,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:04:40,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355101730] [2020-10-14 00:04:40,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:04:40,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:40,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:04:40,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:04:40,507 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 9 states. [2020-10-14 00:04:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:40,677 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2020-10-14 00:04:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 00:04:40,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-14 00:04:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:40,678 INFO L225 Difference]: With dead ends: 182 [2020-10-14 00:04:40,679 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 00:04:40,679 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 [2020-10-14 00:04:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 00:04:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2020-10-14 00:04:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 00:04:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-14 00:04:40,687 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 57 [2020-10-14 00:04:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:40,687 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-14 00:04:40,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:04:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-14 00:04:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 00:04:40,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:40,688 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:40,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 00:04:40,689 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 470736726, now seen corresponding path program 5 times [2020-10-14 00:04:40,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:40,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685567171] [2020-10-14 00:04:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:40,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:40,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:40,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:41,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:45,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:45,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 00:04:45,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:04:45,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 00:04:45,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:45,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:45,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 00:04:45,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 00:04:45,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:45,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:45,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:45,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:45,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:45,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:45,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:45,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:45,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:45,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:45,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:45,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:45,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-14 00:04:45,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685567171] [2020-10-14 00:04:45,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:45,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:04:45,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604887667] [2020-10-14 00:04:45,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:04:45,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:45,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:04:45,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:04:45,790 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 9 states. [2020-10-14 00:04:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:45,986 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2020-10-14 00:04:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 00:04:45,987 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-14 00:04:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:45,988 INFO L225 Difference]: With dead ends: 130 [2020-10-14 00:04:45,988 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 00:04:45,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:04:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 00:04:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2020-10-14 00:04:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 00:04:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-14 00:04:45,997 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 65 [2020-10-14 00:04:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:45,997 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-14 00:04:45,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:04:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-14 00:04:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 00:04:45,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:45,998 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:45,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 00:04:45,999 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:45,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1500096024, now seen corresponding path program 5 times [2020-10-14 00:04:45,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:46,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110911393] [2020-10-14 00:04:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:46,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:46,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:51,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:51,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 00:04:51,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:04:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 00:04:51,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:51,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 00:04:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 00:04:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 00:04:51,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:51,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:51,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:51,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:51,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:51,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:51,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:51,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:51,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:51,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:51,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:51,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:51,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-14 00:04:51,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110911393] [2020-10-14 00:04:51,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:51,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 00:04:51,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049816933] [2020-10-14 00:04:51,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 00:04:51,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 00:04:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:04:51,090 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 10 states. [2020-10-14 00:04:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:51,355 INFO L93 Difference]: Finished difference Result 228 states and 270 transitions. [2020-10-14 00:04:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 00:04:51,356 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-14 00:04:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:51,361 INFO L225 Difference]: With dead ends: 228 [2020-10-14 00:04:51,361 INFO L226 Difference]: Without dead ends: 171 [2020-10-14 00:04:51,362 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 [2020-10-14 00:04:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-14 00:04:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 84. [2020-10-14 00:04:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 00:04:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-10-14 00:04:51,388 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 65 [2020-10-14 00:04:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:51,389 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-10-14 00:04:51,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 00:04:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-10-14 00:04:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 00:04:51,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:51,394 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:51,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 00:04:51,394 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:51,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1632150267, now seen corresponding path program 6 times [2020-10-14 00:04:51,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:51,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962579180] [2020-10-14 00:04:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:51,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:51,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:51,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:51,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:54,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:54,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:56,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:56,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 00:04:56,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 00:04:56,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-14 00:04:56,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:56,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:56,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:04:56,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:56,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 00:04:56,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:56,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:56,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:56,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:56,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:56,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:56,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:56,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:56,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-14 00:04:56,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962579180] [2020-10-14 00:04:56,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:56,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:04:56,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339071292] [2020-10-14 00:04:56,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:04:56,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:56,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:04:56,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:04:56,529 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 7 states. [2020-10-14 00:04:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:56,703 INFO L93 Difference]: Finished difference Result 135 states and 158 transitions. [2020-10-14 00:04:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:04:56,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-14 00:04:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:56,705 INFO L225 Difference]: With dead ends: 135 [2020-10-14 00:04:56,705 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 00:04:56,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:04:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 00:04:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-14 00:04:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 00:04:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-10-14 00:04:56,717 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 73 [2020-10-14 00:04:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:56,717 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-10-14 00:04:56,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:04:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-10-14 00:04:56,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 00:04:56,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:56,719 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:56,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 00:04:56,719 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:56,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:56,720 INFO L82 PathProgramCache]: Analyzing trace with hash -613429187, now seen corresponding path program 6 times [2020-10-14 00:04:56,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:56,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143269307] [2020-10-14 00:04:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:56,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:57,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:01,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:01,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 00:05:01,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:05:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 00:05:01,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:01,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 00:05:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 00:05:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 00:05:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:01,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:01,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:01,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:01,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:01,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:01,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:01,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:01,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:01,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:05:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-14 00:05:01,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143269307] [2020-10-14 00:05:01,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:01,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:05:01,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711698791] [2020-10-14 00:05:01,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:05:01,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:01,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:05:01,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:05:01,861 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 11 states. [2020-10-14 00:05:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:02,086 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2020-10-14 00:05:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 00:05:02,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-10-14 00:05:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:02,087 INFO L225 Difference]: With dead ends: 242 [2020-10-14 00:05:02,087 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 00:05:02,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:05:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 00:05:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 92. [2020-10-14 00:05:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 00:05:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-14 00:05:02,101 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 73 [2020-10-14 00:05:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:02,101 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-14 00:05:02,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:05:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-14 00:05:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 00:05:02,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:02,102 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:02,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 00:05:02,102 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:02,103 INFO L82 PathProgramCache]: Analyzing trace with hash 799580342, now seen corresponding path program 7 times [2020-10-14 00:05:02,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:02,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310022625] [2020-10-14 00:05:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:02,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:02,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:05,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:05,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:05,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:07,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:07,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 00:05:07,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:05:07,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 00:05:07,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:07,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:07,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 00:05:07,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:07,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 00:05:07,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:07,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:07,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:07,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:07,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:07,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:07,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:07,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:07,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:07,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:07,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:07,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:07,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-14 00:05:07,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310022625] [2020-10-14 00:05:07,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:07,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 00:05:07,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579554230] [2020-10-14 00:05:07,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 00:05:07,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 00:05:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:05:07,223 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 10 states. [2020-10-14 00:05:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:07,468 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2020-10-14 00:05:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 00:05:07,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-14 00:05:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:07,469 INFO L225 Difference]: With dead ends: 158 [2020-10-14 00:05:07,469 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 00:05:07,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:05:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 00:05:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2020-10-14 00:05:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 00:05:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-14 00:05:07,481 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 81 [2020-10-14 00:05:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:07,483 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-14 00:05:07,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 00:05:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-14 00:05:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 00:05:07,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:07,484 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:07,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 00:05:07,484 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1152668724, now seen corresponding path program 7 times [2020-10-14 00:05:07,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:07,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640022160] [2020-10-14 00:05:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:07,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:08,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:12,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:12,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 00:05:12,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:05:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 00:05:12,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:12,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 00:05:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 00:05:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 00:05:12,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:12,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:12,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:12,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:12,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:12,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:12,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:12,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:12,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:12,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:12,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-14 00:05:12,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640022160] [2020-10-14 00:05:12,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:12,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 00:05:12,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130726139] [2020-10-14 00:05:12,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 00:05:12,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:12,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 00:05:12,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:05:12,632 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 12 states. [2020-10-14 00:05:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:12,913 INFO L93 Difference]: Finished difference Result 294 states and 350 transitions. [2020-10-14 00:05:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 00:05:12,914 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-14 00:05:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:12,916 INFO L225 Difference]: With dead ends: 294 [2020-10-14 00:05:12,916 INFO L226 Difference]: Without dead ends: 225 [2020-10-14 00:05:12,917 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 [2020-10-14 00:05:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-14 00:05:12,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 100. [2020-10-14 00:05:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 00:05:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2020-10-14 00:05:12,929 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 81 [2020-10-14 00:05:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:12,930 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2020-10-14 00:05:12,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 00:05:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2020-10-14 00:05:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 00:05:12,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:12,931 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:12,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 00:05:12,931 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:12,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1300701413, now seen corresponding path program 8 times [2020-10-14 00:05:12,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:12,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338624575] [2020-10-14 00:05:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:12,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:12,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:13,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:15,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:17,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:17,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 00:05:17,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:05:17,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 00:05:17,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:17,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:17,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 00:05:17,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:17,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 00:05:17,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:18,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:18,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:18,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:18,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:18,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:18,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:18,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:18,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:18,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 62 proven. 15 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2020-10-14 00:05:18,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338624575] [2020-10-14 00:05:18,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:18,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 00:05:18,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57011346] [2020-10-14 00:05:18,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 00:05:18,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 00:05:18,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:05:18,057 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand 8 states. [2020-10-14 00:05:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:18,233 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2020-10-14 00:05:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 00:05:18,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-14 00:05:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:18,235 INFO L225 Difference]: With dead ends: 160 [2020-10-14 00:05:18,236 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 00:05:18,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:05:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 00:05:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-14 00:05:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 00:05:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2020-10-14 00:05:18,247 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 89 [2020-10-14 00:05:18,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:18,248 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2020-10-14 00:05:18,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 00:05:18,248 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2020-10-14 00:05:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 00:05:18,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:18,249 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:18,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 00:05:18,249 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:18,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1744602087, now seen corresponding path program 8 times [2020-10-14 00:05:18,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:18,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300544699] [2020-10-14 00:05:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:18,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:23,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:23,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 00:05:23,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:05:23,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 00:05:23,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:23,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:23,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 00:05:23,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 00:05:23,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 00:05:23,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:23,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:23,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:23,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:23,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:23,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:23,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:23,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:23,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:23,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:23,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:23,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:23,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-14 00:05:23,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300544699] [2020-10-14 00:05:23,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:23,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 00:05:23,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361347872] [2020-10-14 00:05:23,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 00:05:23,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:23,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 00:05:23,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:05:23,410 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand 13 states. [2020-10-14 00:05:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:23,675 INFO L93 Difference]: Finished difference Result 308 states and 364 transitions. [2020-10-14 00:05:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 00:05:23,675 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-10-14 00:05:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:23,677 INFO L225 Difference]: With dead ends: 308 [2020-10-14 00:05:23,677 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 00:05:23,678 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 [2020-10-14 00:05:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 00:05:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 108. [2020-10-14 00:05:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 00:05:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2020-10-14 00:05:23,688 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 89 [2020-10-14 00:05:23,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:23,688 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2020-10-14 00:05:23,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 00:05:23,688 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2020-10-14 00:05:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 00:05:23,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:23,690 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:23,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 00:05:23,690 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:23,692 INFO L82 PathProgramCache]: Analyzing trace with hash 162586126, now seen corresponding path program 9 times [2020-10-14 00:05:23,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:23,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520051664] [2020-10-14 00:05:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:23,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:23,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:23,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:24,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:24,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:28,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:28,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 00:05:28,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:05:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 00:05:28,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:28,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:28,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 00:05:28,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:28,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 00:05:28,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:28,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:28,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:28,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:28,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:28,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:28,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:28,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:28,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:28,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:28,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:28,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2020-10-14 00:05:28,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520051664] [2020-10-14 00:05:28,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:28,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:05:28,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948534089] [2020-10-14 00:05:28,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:05:28,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:05:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:05:28,818 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 11 states. [2020-10-14 00:05:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:29,099 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2020-10-14 00:05:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 00:05:29,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-10-14 00:05:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:29,101 INFO L225 Difference]: With dead ends: 186 [2020-10-14 00:05:29,101 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 00:05:29,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:05:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 00:05:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 108. [2020-10-14 00:05:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 00:05:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2020-10-14 00:05:29,113 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 97 [2020-10-14 00:05:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:29,114 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2020-10-14 00:05:29,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:05:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2020-10-14 00:05:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 00:05:29,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:29,115 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:29,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 00:05:29,115 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash 121911376, now seen corresponding path program 9 times [2020-10-14 00:05:29,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:29,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46819245] [2020-10-14 00:05:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:29,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:29,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:34,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:34,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 00:05:34,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:05:34,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-14 00:05:34,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:34,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 00:05:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 00:05:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 00:05:34,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:34,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:34,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:34,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:34,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:34,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:34,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:34,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:34,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:34,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:34,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:34,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:34,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-14 00:05:34,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46819245] [2020-10-14 00:05:34,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:34,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 00:05:34,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643202621] [2020-10-14 00:05:34,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 00:05:34,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 00:05:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:05:34,298 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 14 states. [2020-10-14 00:05:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:34,588 INFO L93 Difference]: Finished difference Result 366 states and 438 transitions. [2020-10-14 00:05:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 00:05:34,591 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-14 00:05:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:34,593 INFO L225 Difference]: With dead ends: 366 [2020-10-14 00:05:34,593 INFO L226 Difference]: Without dead ends: 285 [2020-10-14 00:05:34,594 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 [2020-10-14 00:05:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-14 00:05:34,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 116. [2020-10-14 00:05:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 00:05:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2020-10-14 00:05:34,608 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 97 [2020-10-14 00:05:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:34,608 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2020-10-14 00:05:34,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 00:05:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2020-10-14 00:05:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 00:05:34,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:34,610 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:34,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 00:05:34,610 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2113491661, now seen corresponding path program 10 times [2020-10-14 00:05:34,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:34,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783501096] [2020-10-14 00:05:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:34,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:34,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:35,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:36,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:39,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:39,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 00:05:39,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:05:39,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5249 [2020-10-14 00:05:39,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:39,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:39,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 00:05:39,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:39,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 00:05:39,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:39,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:39,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:39,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:39,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:39,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:39,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:39,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:39,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:39,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-10-14 00:05:39,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783501096] [2020-10-14 00:05:39,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:39,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:05:39,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199064311] [2020-10-14 00:05:39,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:05:39,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:39,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:05:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:05:39,970 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand 9 states. [2020-10-14 00:05:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:40,177 INFO L93 Difference]: Finished difference Result 185 states and 216 transitions. [2020-10-14 00:05:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 00:05:40,178 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 105 [2020-10-14 00:05:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:40,179 INFO L225 Difference]: With dead ends: 185 [2020-10-14 00:05:40,180 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 00:05:40,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:05:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 00:05:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-14 00:05:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 00:05:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2020-10-14 00:05:40,193 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 105 [2020-10-14 00:05:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:40,193 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2020-10-14 00:05:40,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:05:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2020-10-14 00:05:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 00:05:40,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:40,195 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:40,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 00:05:40,195 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:40,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:40,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1502203381, now seen corresponding path program 10 times [2020-10-14 00:05:40,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:40,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288692516] [2020-10-14 00:05:40,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:40,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:40,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:45,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:45,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 00:05:45,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:05:45,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 00:05:45,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:45,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:45,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 00:05:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 00:05:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 00:05:45,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:45,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:45,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:45,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:45,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:45,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:45,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:45,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:45,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:45,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-14 00:05:45,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288692516] [2020-10-14 00:05:45,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:45,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 00:05:45,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987693153] [2020-10-14 00:05:45,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 00:05:45,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 00:05:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:05:45,356 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand 15 states. [2020-10-14 00:05:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:45,670 INFO L93 Difference]: Finished difference Result 380 states and 452 transitions. [2020-10-14 00:05:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 00:05:45,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 105 [2020-10-14 00:05:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:45,673 INFO L225 Difference]: With dead ends: 380 [2020-10-14 00:05:45,673 INFO L226 Difference]: Without dead ends: 293 [2020-10-14 00:05:45,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:05:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-14 00:05:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 124. [2020-10-14 00:05:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 00:05:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2020-10-14 00:05:45,689 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 105 [2020-10-14 00:05:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:45,689 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2020-10-14 00:05:45,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 00:05:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2020-10-14 00:05:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-14 00:05:45,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:45,691 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:45,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 00:05:45,691 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:45,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1982677614, now seen corresponding path program 11 times [2020-10-14 00:05:45,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:45,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606575291] [2020-10-14 00:05:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:45,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:45,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:46,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:50,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:50,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 00:05:50,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:05:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-14 00:05:50,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:50,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 00:05:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 00:05:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:50,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:50,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:50,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:50,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:50,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:50,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:50,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:50,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:50,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:50,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:50,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:50,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2020-10-14 00:05:50,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606575291] [2020-10-14 00:05:50,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:50,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 00:05:50,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988542585] [2020-10-14 00:05:50,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 00:05:50,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:50,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 00:05:50,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:05:50,855 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand 12 states. [2020-10-14 00:05:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:51,173 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2020-10-14 00:05:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 00:05:51,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-10-14 00:05:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:51,175 INFO L225 Difference]: With dead ends: 214 [2020-10-14 00:05:51,176 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 00:05:51,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:05:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 00:05:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2020-10-14 00:05:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 00:05:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2020-10-14 00:05:51,192 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 113 [2020-10-14 00:05:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:51,192 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2020-10-14 00:05:51,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 00:05:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2020-10-14 00:05:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-14 00:05:51,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:51,194 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:51,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 00:05:51,194 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:51,195 INFO L82 PathProgramCache]: Analyzing trace with hash -626109844, now seen corresponding path program 11 times [2020-10-14 00:05:51,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:51,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556141465] [2020-10-14 00:05:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:51,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:51,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:56,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:56,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 00:05:56,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:05:56,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-14 00:05:56,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:56,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 00:05:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 00:05:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 00:05:56,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:56,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:56,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:56,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:56,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:56,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:56,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:56,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:56,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:56,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:56,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:56,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:56,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-14 00:05:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-10-14 00:05:56,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556141465] [2020-10-14 00:05:56,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:56,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 00:05:56,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521700689] [2020-10-14 00:05:56,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 00:05:56,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 00:05:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:05:56,429 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand 16 states. [2020-10-14 00:05:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:56,778 INFO L93 Difference]: Finished difference Result 444 states and 534 transitions. [2020-10-14 00:05:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 00:05:56,779 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 113 [2020-10-14 00:05:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:56,782 INFO L225 Difference]: With dead ends: 444 [2020-10-14 00:05:56,782 INFO L226 Difference]: Without dead ends: 351 [2020-10-14 00:05:56,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:05:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-14 00:05:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 132. [2020-10-14 00:05:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 00:05:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2020-10-14 00:05:56,800 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 113 [2020-10-14 00:05:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:56,801 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2020-10-14 00:05:56,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 00:05:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2020-10-14 00:05:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-14 00:05:56,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:56,802 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:56,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 00:05:56,803 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash 402336851, now seen corresponding path program 12 times [2020-10-14 00:05:56,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:56,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007221650] [2020-10-14 00:05:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:56,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:56,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:58,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:58,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:01,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:01,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 00:06:01,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:06:01,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 00:06:01,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:01,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:01,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 00:06:01,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:06:01,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 00:06:01,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:01,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:01,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:01,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:01,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:01,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:01,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:01,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:01,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:01,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:01,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2020-10-14 00:06:01,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007221650] [2020-10-14 00:06:01,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:01,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 00:06:01,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645372640] [2020-10-14 00:06:01,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 00:06:01,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 00:06:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:06:01,964 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand 13 states. [2020-10-14 00:06:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:02,295 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2020-10-14 00:06:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 00:06:02,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-10-14 00:06:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:02,298 INFO L225 Difference]: With dead ends: 231 [2020-10-14 00:06:02,298 INFO L226 Difference]: Without dead ends: 176 [2020-10-14 00:06:02,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-14 00:06:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-14 00:06:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 132. [2020-10-14 00:06:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 00:06:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2020-10-14 00:06:02,317 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 121 [2020-10-14 00:06:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:02,318 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2020-10-14 00:06:02,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 00:06:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2020-10-14 00:06:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-14 00:06:02,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:02,319 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:02,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 00:06:02,320 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:02,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1369687505, now seen corresponding path program 12 times [2020-10-14 00:06:02,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:02,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635526034] [2020-10-14 00:06:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:02,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:02,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:07,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:07,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 00:06:07,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:06:07,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-14 00:06:07,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:07,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 00:06:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 00:06:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 00:06:07,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:07,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:07,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:07,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:07,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:07,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:07,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:07,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:07,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2020-10-14 00:06:07,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635526034] [2020-10-14 00:06:07,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:07,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 00:06:07,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697091909] [2020-10-14 00:06:07,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 00:06:07,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 00:06:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:06:07,584 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand 17 states. [2020-10-14 00:06:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:08,058 INFO L93 Difference]: Finished difference Result 514 states and 624 transitions. [2020-10-14 00:06:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 00:06:08,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-10-14 00:06:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:08,061 INFO L225 Difference]: With dead ends: 514 [2020-10-14 00:06:08,062 INFO L226 Difference]: Without dead ends: 415 [2020-10-14 00:06:08,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:06:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-14 00:06:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 140. [2020-10-14 00:06:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 00:06:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2020-10-14 00:06:08,101 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 121 [2020-10-14 00:06:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:08,102 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2020-10-14 00:06:08,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 00:06:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2020-10-14 00:06:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 00:06:08,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:08,108 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:08,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 00:06:08,109 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash 908369802, now seen corresponding path program 13 times [2020-10-14 00:06:08,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:08,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340244975] [2020-10-14 00:06:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:08,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:08,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:08,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:09,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:13,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:13,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 00:06:13,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:06:13,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 00:06:13,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:13,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 00:06:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:06:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 00:06:13,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:13,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:13,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:13,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:13,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:13,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:13,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:13,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:13,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:13,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:13,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:13,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:13,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:06:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 147 proven. 40 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2020-10-14 00:06:13,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340244975] [2020-10-14 00:06:13,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:13,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 00:06:13,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739496149] [2020-10-14 00:06:13,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 00:06:13,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:13,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 00:06:13,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:06:13,268 INFO L87 Difference]: Start difference. First operand 140 states and 161 transitions. Second operand 10 states. [2020-10-14 00:06:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:13,487 INFO L93 Difference]: Finished difference Result 224 states and 263 transitions. [2020-10-14 00:06:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 00:06:13,487 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 129 [2020-10-14 00:06:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:13,489 INFO L225 Difference]: With dead ends: 224 [2020-10-14 00:06:13,489 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 00:06:13,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:06:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 00:06:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-14 00:06:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 00:06:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2020-10-14 00:06:13,509 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 129 [2020-10-14 00:06:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:13,509 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2020-10-14 00:06:13,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 00:06:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2020-10-14 00:06:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 00:06:13,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:13,510 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:13,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 00:06:13,511 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 881304200, now seen corresponding path program 13 times [2020-10-14 00:06:13,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:13,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846233900] [2020-10-14 00:06:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:13,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:13,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:18,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:18,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 00:06:18,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:06:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-14 00:06:18,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:18,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 00:06:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 00:06:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 00:06:18,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:18,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:18,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:18,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:18,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:18,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:18,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:18,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:18,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:18,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:18,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:18,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:18,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2020-10-14 00:06:18,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846233900] [2020-10-14 00:06:18,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:18,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 00:06:18,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260087545] [2020-10-14 00:06:18,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 00:06:18,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:18,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 00:06:18,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:06:18,816 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand 18 states. [2020-10-14 00:06:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:19,188 INFO L93 Difference]: Finished difference Result 528 states and 638 transitions. [2020-10-14 00:06:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 00:06:19,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 129 [2020-10-14 00:06:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:19,192 INFO L225 Difference]: With dead ends: 528 [2020-10-14 00:06:19,192 INFO L226 Difference]: Without dead ends: 423 [2020-10-14 00:06:19,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:06:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-14 00:06:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 148. [2020-10-14 00:06:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 00:06:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2020-10-14 00:06:19,217 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 129 [2020-10-14 00:06:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:19,218 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2020-10-14 00:06:19,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 00:06:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2020-10-14 00:06:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 00:06:19,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:19,219 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:19,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 00:06:19,219 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:19,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1596379285, now seen corresponding path program 14 times [2020-10-14 00:06:19,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:19,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092298538] [2020-10-14 00:06:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:19,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:19,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:19,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:24,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:24,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 00:06:24,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:06:24,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 00:06:24,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:24,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:24,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 00:06:24,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:06:24,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-14 00:06:24,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:24,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:24,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:24,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:24,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:24,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:24,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:24,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:24,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-14 00:06:24,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092298538] [2020-10-14 00:06:24,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:24,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 00:06:24,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901736046] [2020-10-14 00:06:24,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 00:06:24,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 00:06:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:06:24,405 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand 14 states. [2020-10-14 00:06:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:24,758 INFO L93 Difference]: Finished difference Result 259 states and 308 transitions. [2020-10-14 00:06:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 00:06:24,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-14 00:06:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:24,761 INFO L225 Difference]: With dead ends: 259 [2020-10-14 00:06:24,761 INFO L226 Difference]: Without dead ends: 198 [2020-10-14 00:06:24,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-14 00:06:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-14 00:06:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2020-10-14 00:06:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 00:06:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2020-10-14 00:06:24,782 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 137 [2020-10-14 00:06:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:24,782 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2020-10-14 00:06:24,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 00:06:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2020-10-14 00:06:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 00:06:24,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:24,783 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:24,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 00:06:24,784 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash -453876819, now seen corresponding path program 14 times [2020-10-14 00:06:24,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:24,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467341017] [2020-10-14 00:06:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:24,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:29,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:29,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 00:06:29,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:06:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-14 00:06:29,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:29,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 00:06:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 00:06:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 00:06:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:30,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:30,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:30,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:30,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:30,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:30,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:06:30,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:30,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:30,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:30,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:30,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:30,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-10-14 00:06:30,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467341017] [2020-10-14 00:06:30,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:30,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 00:06:30,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229109576] [2020-10-14 00:06:30,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 00:06:30,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 00:06:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:06:30,088 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand 19 states. [2020-10-14 00:06:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:30,579 INFO L93 Difference]: Finished difference Result 604 states and 736 transitions. [2020-10-14 00:06:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 00:06:30,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2020-10-14 00:06:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:30,583 INFO L225 Difference]: With dead ends: 604 [2020-10-14 00:06:30,583 INFO L226 Difference]: Without dead ends: 493 [2020-10-14 00:06:30,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:06:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2020-10-14 00:06:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 156. [2020-10-14 00:06:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 00:06:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2020-10-14 00:06:30,612 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 137 [2020-10-14 00:06:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:30,612 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2020-10-14 00:06:30,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 00:06:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2020-10-14 00:06:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-14 00:06:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:30,613 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:30,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 00:06:30,614 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1314411038, now seen corresponding path program 15 times [2020-10-14 00:06:30,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:30,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725211638] [2020-10-14 00:06:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:30,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:30,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:30,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:35,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:35,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-14 00:06:35,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:06:35,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-14 00:06:35,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:35,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:35,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 00:06:35,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:06:35,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 00:06:35,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:35,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:35,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:35,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:35,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:35,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:35,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:35,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:35,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 193 proven. 57 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked. [2020-10-14 00:06:35,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725211638] [2020-10-14 00:06:35,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:35,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:06:35,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537263861] [2020-10-14 00:06:35,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:06:35,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:35,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:06:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:06:35,796 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand 11 states. [2020-10-14 00:06:36,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:36,035 INFO L93 Difference]: Finished difference Result 249 states and 292 transitions. [2020-10-14 00:06:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 00:06:36,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 145 [2020-10-14 00:06:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:36,037 INFO L225 Difference]: With dead ends: 249 [2020-10-14 00:06:36,037 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 00:06:36,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:06:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 00:06:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-14 00:06:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 00:06:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2020-10-14 00:06:36,067 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 145 [2020-10-14 00:06:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:36,068 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2020-10-14 00:06:36,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:06:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2020-10-14 00:06:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-14 00:06:36,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:36,069 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:36,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 00:06:36,069 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:36,070 INFO L82 PathProgramCache]: Analyzing trace with hash 644163748, now seen corresponding path program 15 times [2020-10-14 00:06:36,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:36,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881375163] [2020-10-14 00:06:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:36,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:42,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5962 [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 00:06:42,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:42,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:42,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:42,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:42,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:42,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:42,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:42,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:42,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:42,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:42,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:42,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:42,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-10-14 00:06:42,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881375163] [2020-10-14 00:06:42,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:42,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 00:06:42,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902709211] [2020-10-14 00:06:42,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 00:06:42,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 00:06:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:06:42,272 INFO L87 Difference]: Start difference. First operand 156 states and 177 transitions. Second operand 20 states. [2020-10-14 00:06:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:42,778 INFO L93 Difference]: Finished difference Result 618 states and 750 transitions. [2020-10-14 00:06:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 00:06:42,779 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2020-10-14 00:06:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:42,782 INFO L225 Difference]: With dead ends: 618 [2020-10-14 00:06:42,783 INFO L226 Difference]: Without dead ends: 501 [2020-10-14 00:06:42,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:06:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-14 00:06:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 164. [2020-10-14 00:06:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-14 00:06:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 187 transitions. [2020-10-14 00:06:42,808 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 187 transitions. Word has length 145 [2020-10-14 00:06:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:42,808 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 187 transitions. [2020-10-14 00:06:42,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 00:06:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 187 transitions. [2020-10-14 00:06:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 00:06:42,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:42,809 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:42,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 00:06:42,809 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:42,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:42,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1658441333, now seen corresponding path program 16 times [2020-10-14 00:06:42,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:42,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658500516] [2020-10-14 00:06:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:42,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:46,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:47,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:47,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 00:06:47,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:06:47,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-14 00:06:47,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:47,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 00:06:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:06:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-14 00:06:47,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:48,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:48,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:48,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:48,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:48,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:48,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:48,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:48,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:48,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:48,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:48,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 348 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2020-10-14 00:06:48,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658500516] [2020-10-14 00:06:48,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:48,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 00:06:48,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537172462] [2020-10-14 00:06:48,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 00:06:48,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:48,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 00:06:48,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:06:48,091 INFO L87 Difference]: Start difference. First operand 164 states and 187 transitions. Second operand 15 states. [2020-10-14 00:06:48,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:48,506 INFO L93 Difference]: Finished difference Result 287 states and 341 transitions. [2020-10-14 00:06:48,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 00:06:48,506 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 153 [2020-10-14 00:06:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:48,508 INFO L225 Difference]: With dead ends: 287 [2020-10-14 00:06:48,508 INFO L226 Difference]: Without dead ends: 220 [2020-10-14 00:06:48,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-14 00:06:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-14 00:06:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 164. [2020-10-14 00:06:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-14 00:06:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 187 transitions. [2020-10-14 00:06:48,539 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 187 transitions. Word has length 153 [2020-10-14 00:06:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:48,540 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 187 transitions. [2020-10-14 00:06:48,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 00:06:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 187 transitions. [2020-10-14 00:06:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 00:06:48,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:48,541 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:48,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 00:06:48,542 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash -887707767, now seen corresponding path program 16 times [2020-10-14 00:06:48,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:48,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186835950] [2020-10-14 00:06:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:48,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:48,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:53,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:53,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 00:06:53,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:06:53,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5190 [2020-10-14 00:06:53,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:53,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:53,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 00:06:53,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 00:06:53,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 00:06:53,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:53,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:53,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:53,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:53,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:53,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:53,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:06:53,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:53,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:53,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:53,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:53,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2020-10-14 00:06:54,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186835950] [2020-10-14 00:06:54,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:54,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 00:06:54,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051518246] [2020-10-14 00:06:54,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 00:06:54,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 00:06:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:06:54,013 INFO L87 Difference]: Start difference. First operand 164 states and 187 transitions. Second operand 21 states. [2020-10-14 00:06:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:54,527 INFO L93 Difference]: Finished difference Result 700 states and 856 transitions. [2020-10-14 00:06:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 00:06:54,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 153 [2020-10-14 00:06:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:54,532 INFO L225 Difference]: With dead ends: 700 [2020-10-14 00:06:54,532 INFO L226 Difference]: Without dead ends: 577 [2020-10-14 00:06:54,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:06:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-10-14 00:06:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 172. [2020-10-14 00:06:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 00:06:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 197 transitions. [2020-10-14 00:06:54,571 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 197 transitions. Word has length 153 [2020-10-14 00:06:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:54,571 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 197 transitions. [2020-10-14 00:06:54,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 00:06:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 197 transitions. [2020-10-14 00:06:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 00:06:54,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:54,573 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:54,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 00:06:54,573 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 241722690, now seen corresponding path program 17 times [2020-10-14 00:06:54,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:54,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629200936] [2020-10-14 00:06:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:54,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:57,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:00,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:00,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 00:07:00,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:07:00,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5663 [2020-10-14 00:07:00,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:00,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:00,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 00:07:00,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:07:00,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 00:07:00,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:00,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:07:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:00,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:00,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:00,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:07:00,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:07:00,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:07:00,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:00,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:07:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:07:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:07:00,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked. [2020-10-14 00:07:00,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629200936] [2020-10-14 00:07:00,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:07:00,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 00:07:00,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112379106] [2020-10-14 00:07:00,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 00:07:00,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:07:00,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 00:07:00,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:07:00,426 INFO L87 Difference]: Start difference. First operand 172 states and 197 transitions. Second operand 16 states. [2020-10-14 00:07:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:07:00,907 INFO L93 Difference]: Finished difference Result 304 states and 363 transitions. [2020-10-14 00:07:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 00:07:00,908 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-10-14 00:07:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:07:00,910 INFO L225 Difference]: With dead ends: 304 [2020-10-14 00:07:00,910 INFO L226 Difference]: Without dead ends: 234 [2020-10-14 00:07:00,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-14 00:07:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-14 00:07:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 172. [2020-10-14 00:07:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 00:07:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 197 transitions. [2020-10-14 00:07:00,948 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 197 transitions. Word has length 161 [2020-10-14 00:07:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:07:00,949 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 197 transitions. [2020-10-14 00:07:00,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 00:07:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 197 transitions. [2020-10-14 00:07:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 00:07:00,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:07:00,950 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:07:00,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 00:07:00,950 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:07:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:07:00,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1109662528, now seen corresponding path program 17 times [2020-10-14 00:07:00,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:07:00,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609611692] [2020-10-14 00:07:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:07:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:00,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:01,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:06,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:06,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 00:07:06,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:07:06,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5139 [2020-10-14 00:07:06,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:06,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:06,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 00:07:06,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 00:07:06,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 00:07:06,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:06,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:07:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:06,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:06,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:06,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:07:06,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:07:06,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:07:06,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:06,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:06,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:07:06,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:07:06,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:07:06,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2020-10-14 00:07:06,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609611692] [2020-10-14 00:07:06,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:07:06,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 00:07:06,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548508534] [2020-10-14 00:07:06,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 00:07:06,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:07:06,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 00:07:06,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 00:07:06,393 INFO L87 Difference]: Start difference. First operand 172 states and 197 transitions. Second operand 22 states. [2020-10-14 00:07:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:07:07,144 INFO L93 Difference]: Finished difference Result 788 states and 970 transitions. [2020-10-14 00:07:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 00:07:07,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 161 [2020-10-14 00:07:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:07:07,149 INFO L225 Difference]: With dead ends: 788 [2020-10-14 00:07:07,149 INFO L226 Difference]: Without dead ends: 659 [2020-10-14 00:07:07,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 00:07:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-14 00:07:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 180. [2020-10-14 00:07:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-14 00:07:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2020-10-14 00:07:07,218 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 161 [2020-10-14 00:07:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:07:07,219 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2020-10-14 00:07:07,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 00:07:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2020-10-14 00:07:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 00:07:07,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:07:07,221 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:07:07,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 00:07:07,222 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:07:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:07:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash -523753369, now seen corresponding path program 18 times [2020-10-14 00:07:07,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:07:07,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962907376] [2020-10-14 00:07:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:07:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:07,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:07,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:07,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:12,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:12,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-14 00:07:12,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:07:12,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5200 [2020-10-14 00:07:12,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:12,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:12,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 00:07:12,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:07:12,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 00:07:12,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:12,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:07:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:12,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:12,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:12,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:07:12,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:07:12,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:07:12,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:12,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:12,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:07:12,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:07:12,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:07:12,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 268 proven. 77 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-14 00:07:12,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962907376] [2020-10-14 00:07:12,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:07:12,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 00:07:12,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342497378] [2020-10-14 00:07:12,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 00:07:12,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:07:12,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 00:07:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:07:12,579 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand 12 states. [2020-10-14 00:07:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:07:12,928 INFO L93 Difference]: Finished difference Result 288 states and 339 transitions. [2020-10-14 00:07:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 00:07:12,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 169 [2020-10-14 00:07:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:07:12,929 INFO L225 Difference]: With dead ends: 288 [2020-10-14 00:07:12,929 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 00:07:12,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:07:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 00:07:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-14 00:07:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-14 00:07:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 205 transitions. [2020-10-14 00:07:12,959 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 205 transitions. Word has length 169 [2020-10-14 00:07:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:07:12,959 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 205 transitions. [2020-10-14 00:07:12,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 00:07:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 205 transitions. [2020-10-14 00:07:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 00:07:12,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:07:12,960 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:07:12,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 00:07:12,961 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:07:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:07:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash 783389029, now seen corresponding path program 18 times [2020-10-14 00:07:12,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:07:12,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589820603] [2020-10-14 00:07:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:07:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:12,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:13,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:18,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:18,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-14 00:07:18,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:07:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5173 [2020-10-14 00:07:18,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:18,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 00:07:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 00:07:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 00:07:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:18,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:07:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:18,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:18,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:18,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:07:18,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:07:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:07:18,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:18,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:18,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:07:18,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:07:18,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:07:18,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:07:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2020-10-14 00:07:18,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589820603] [2020-10-14 00:07:18,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:07:18,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 00:07:18,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838332231] [2020-10-14 00:07:18,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 00:07:18,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:07:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 00:07:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:07:18,548 INFO L87 Difference]: Start difference. First operand 180 states and 205 transitions. Second operand 23 states. [2020-10-14 00:07:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:07:19,552 INFO L93 Difference]: Finished difference Result 802 states and 984 transitions. [2020-10-14 00:07:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 00:07:19,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 169 [2020-10-14 00:07:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:07:19,556 INFO L225 Difference]: With dead ends: 802 [2020-10-14 00:07:19,556 INFO L226 Difference]: Without dead ends: 667 [2020-10-14 00:07:19,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:07:19,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2020-10-14 00:07:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 188. [2020-10-14 00:07:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 00:07:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 215 transitions. [2020-10-14 00:07:19,621 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 215 transitions. Word has length 169 [2020-10-14 00:07:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:07:19,622 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 215 transitions. [2020-10-14 00:07:19,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 00:07:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 215 transitions. [2020-10-14 00:07:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-14 00:07:19,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:07:19,624 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:07:19,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 00:07:19,624 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:07:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:07:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1219508070, now seen corresponding path program 19 times [2020-10-14 00:07:19,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:07:19,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376575445] [2020-10-14 00:07:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:07:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:19,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:19,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:25,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:25,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-14 00:07:25,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:07:25,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5451 [2020-10-14 00:07:25,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:25,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:25,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 00:07:25,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:07:25,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 00:07:25,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:25,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:07:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:25,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:25,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:25,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:07:25,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:07:25,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:07:25,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:25,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:25,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:07:25,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:07:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:07:25,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:07:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2020-10-14 00:07:25,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376575445] [2020-10-14 00:07:25,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:07:25,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 00:07:25,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149021350] [2020-10-14 00:07:25,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 00:07:25,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:07:25,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 00:07:25,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:07:25,358 INFO L87 Difference]: Start difference. First operand 188 states and 215 transitions. Second operand 17 states. [2020-10-14 00:07:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:07:25,955 INFO L93 Difference]: Finished difference Result 332 states and 396 transitions. [2020-10-14 00:07:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 00:07:25,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 177 [2020-10-14 00:07:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:07:25,958 INFO L225 Difference]: With dead ends: 332 [2020-10-14 00:07:25,958 INFO L226 Difference]: Without dead ends: 256 [2020-10-14 00:07:25,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-14 00:07:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-14 00:07:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 188. [2020-10-14 00:07:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 00:07:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 215 transitions. [2020-10-14 00:07:26,033 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 215 transitions. Word has length 177 [2020-10-14 00:07:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:07:26,034 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 215 transitions. [2020-10-14 00:07:26,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 00:07:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 215 transitions. [2020-10-14 00:07:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-14 00:07:26,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:07:26,036 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:07:26,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 00:07:26,036 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:07:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:07:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1686165212, now seen corresponding path program 19 times [2020-10-14 00:07:26,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:07:26,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332557596] [2020-10-14 00:07:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:07:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:26,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:31,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:31,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-14 00:07:31,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:07:31,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-14 00:07:31,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:31,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 00:07:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 00:07:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 00:07:31,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:31,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:07:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:31,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:31,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:31,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:07:31,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:07:31,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:07:31,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:31,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:31,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:07:31,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:07:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:07:31,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:07:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-14 00:07:31,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332557596] [2020-10-14 00:07:31,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:07:31,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 00:07:31,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823690696] [2020-10-14 00:07:31,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 00:07:31,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:07:31,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 00:07:31,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 00:07:31,526 INFO L87 Difference]: Start difference. First operand 188 states and 215 transitions. Second operand 24 states. [2020-10-14 00:07:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:07:32,313 INFO L93 Difference]: Finished difference Result 896 states and 1106 transitions. [2020-10-14 00:07:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 00:07:32,314 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 177 [2020-10-14 00:07:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:07:32,317 INFO L225 Difference]: With dead ends: 896 [2020-10-14 00:07:32,317 INFO L226 Difference]: Without dead ends: 755 [2020-10-14 00:07:32,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 00:07:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2020-10-14 00:07:32,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 196. [2020-10-14 00:07:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-14 00:07:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 225 transitions. [2020-10-14 00:07:32,377 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 225 transitions. Word has length 177 [2020-10-14 00:07:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:07:32,377 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 225 transitions. [2020-10-14 00:07:32,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 00:07:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 225 transitions. [2020-10-14 00:07:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-14 00:07:32,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:07:32,379 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:07:32,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 00:07:32,379 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:07:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:07:32,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1314540671, now seen corresponding path program 20 times [2020-10-14 00:07:32,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:07:32,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47493816] [2020-10-14 00:07:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:07:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:32,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:32,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:32,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:37,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:37,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-14 00:07:37,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:07:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-14 00:07:37,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:37,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 00:07:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:07:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 00:07:37,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:37,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:07:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:37,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:37,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:37,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:07:37,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:07:37,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:07:37,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:37,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:07:37,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:07:37,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:07:37,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 329 proven. 100 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2020-10-14 00:07:37,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47493816] [2020-10-14 00:07:37,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:07:37,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 00:07:37,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163165209] [2020-10-14 00:07:37,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 00:07:37,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:07:37,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 00:07:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:07:37,639 INFO L87 Difference]: Start difference. First operand 196 states and 225 transitions. Second operand 13 states. [2020-10-14 00:07:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:07:37,949 INFO L93 Difference]: Finished difference Result 313 states and 368 transitions. [2020-10-14 00:07:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 00:07:37,950 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 185 [2020-10-14 00:07:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:07:37,951 INFO L225 Difference]: With dead ends: 313 [2020-10-14 00:07:37,952 INFO L226 Difference]: Without dead ends: 196 [2020-10-14 00:07:37,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:07:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-14 00:07:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-14 00:07:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-14 00:07:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 223 transitions. [2020-10-14 00:07:38,009 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 223 transitions. Word has length 185 [2020-10-14 00:07:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:07:38,009 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 223 transitions. [2020-10-14 00:07:38,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 00:07:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 223 transitions. [2020-10-14 00:07:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-14 00:07:38,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:07:38,011 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:07:38,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 00:07:38,011 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:07:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:07:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash -849075903, now seen corresponding path program 20 times [2020-10-14 00:07:38,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:07:38,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62746548] [2020-10-14 00:07:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:07:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:38,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:38,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:43,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:43,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-14 00:07:43,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:07:43,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-14 00:07:43,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:43,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 00:07:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 00:07:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 00:07:43,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:43,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:07:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:43,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:43,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:07:43,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:07:43,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:07:43,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:07:43,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:07:43,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:07:43,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:07:43,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:07:43,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:07:43,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:07:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2020-10-14 00:07:43,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62746548] [2020-10-14 00:07:43,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:07:43,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 00:07:43,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170098059] [2020-10-14 00:07:43,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 00:07:43,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:07:43,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 00:07:43,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:07:43,456 INFO L87 Difference]: Start difference. First operand 196 states and 223 transitions. Second operand 25 states. [2020-10-14 00:07:44,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:07:44,210 INFO L93 Difference]: Finished difference Result 910 states and 1120 transitions. [2020-10-14 00:07:44,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 00:07:44,211 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 185 [2020-10-14 00:07:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:07:44,215 INFO L225 Difference]: With dead ends: 910 [2020-10-14 00:07:44,216 INFO L226 Difference]: Without dead ends: 763 [2020-10-14 00:07:44,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:07:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-10-14 00:07:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 204. [2020-10-14 00:07:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-14 00:07:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 233 transitions. [2020-10-14 00:07:44,274 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 233 transitions. Word has length 185 [2020-10-14 00:07:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:07:44,274 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 233 transitions. [2020-10-14 00:07:44,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 00:07:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 233 transitions. [2020-10-14 00:07:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-14 00:07:44,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:07:44,276 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:07:44,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 00:07:44,276 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:07:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:07:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1495588102, now seen corresponding path program 21 times [2020-10-14 00:07:44,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:07:44,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389580154] [2020-10-14 00:07:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:07:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:07:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:44,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:07:44,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking...