/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:38:53,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:38:54,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:38:54,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:38:54,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:38:54,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:38:54,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:38:54,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:38:54,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:38:54,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:38:54,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:38:54,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:38:54,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:38:54,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:38:54,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:38:54,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:38:54,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:38:54,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:38:54,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:38:54,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:38:54,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:38:54,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:38:54,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:38:54,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:38:54,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:38:54,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:38:54,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:38:54,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:38:54,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:38:54,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:38:54,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:38:54,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:38:54,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:38:54,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:38:54,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:38:54,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:38:54,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:38:54,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:38:54,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:38:54,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:38:54,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:38:54,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:38:54,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:38:54,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:38:54,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:38:54,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:38:54,117 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:38:54,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:38:54,118 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:38:54,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:38:54,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:38:54,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:38:54,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:38:54,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:38:54,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:38:54,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:38:54,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:38:54,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:38:54,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:38:54,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:38:54,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:38:54,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:38:54,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:38:54,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:38:54,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:38:54,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:38:54,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:38:54,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:38:54,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:38:54,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:38:54,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:38:54,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:38:54,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:38:54,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:38:54,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:38:54,474 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:38:54,475 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:38:54,476 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2020-10-13 23:38:54,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55dc52211/dd204ffb4f054cf4a63ce26900464cc9/FLAG04c4d12c9 [2020-10-13 23:38:54,982 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:38:54,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2020-10-13 23:38:54,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55dc52211/dd204ffb4f054cf4a63ce26900464cc9/FLAG04c4d12c9 [2020-10-13 23:38:55,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55dc52211/dd204ffb4f054cf4a63ce26900464cc9 [2020-10-13 23:38:55,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:38:55,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:38:55,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:55,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:38:55,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:38:55,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54001c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55, skipping insertion in model container [2020-10-13 23:38:55,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:38:55,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:38:55,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:55,626 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:38:55,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:55,671 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:38:55,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55 WrapperNode [2020-10-13 23:38:55,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:55,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:38:55,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:38:55,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:38:55,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (1/1) ... [2020-10-13 23:38:55,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:38:55,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:38:55,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:38:55,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:38:55,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:38:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:38:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:38:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:38:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:38:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:38:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:38:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:38:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:38:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:38:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:38:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:38:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:38:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:38:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:38:56,322 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:38:56,322 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:38:56,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:56 BoogieIcfgContainer [2020-10-13 23:38:56,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:38:56,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:38:56,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:38:56,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:38:56,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:38:55" (1/3) ... [2020-10-13 23:38:56,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b260af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:56, skipping insertion in model container [2020-10-13 23:38:56,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:55" (2/3) ... [2020-10-13 23:38:56,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b260af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:56, skipping insertion in model container [2020-10-13 23:38:56,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:56" (3/3) ... [2020-10-13 23:38:56,335 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2020-10-13 23:38:56,346 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:38:56,353 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:38:56,367 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:38:56,393 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:38:56,394 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:38:56,394 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:38:56,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:38:56,395 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:38:56,395 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:38:56,395 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:38:56,395 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:38:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-13 23:38:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:38:56,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:56,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:56,424 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:56,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:56,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1241254978, now seen corresponding path program 1 times [2020-10-13 23:38:56,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:56,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420323013] [2020-10-13 23:38:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:56,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:56,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:56,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:56,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:38:56,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:56,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-13 23:38:56,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:56,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:38:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:56,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:38:56,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:56,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:56,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:56,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:56,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:56,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:38:56,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:56,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:56,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:38:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:56,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420323013] [2020-10-13 23:38:56,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:56,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:38:56,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811776790] [2020-10-13 23:38:56,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:38:56,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:38:56,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:56,813 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-13 23:38:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:56,911 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-13 23:38:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:38:56,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 23:38:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:56,922 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:38:56,923 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 23:38:56,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 23:38:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 23:38:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 23:38:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 23:38:56,966 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2020-10-13 23:38:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:56,966 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 23:38:56,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:38:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 23:38:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:38:56,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:56,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:56,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:38:56,968 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash -159068691, now seen corresponding path program 1 times [2020-10-13 23:38:56,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:56,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590500071] [2020-10-13 23:38:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:56,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:38:57,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:57,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-13 23:38:57,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:38:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:38:57,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:38:57,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:57,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:57,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:38:57,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:57,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:57,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:57,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:57,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590500071] [2020-10-13 23:38:57,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:57,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:38:57,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863447158] [2020-10-13 23:38:57,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:38:57,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:57,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:38:57,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:57,250 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-13 23:38:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:57,320 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-13 23:38:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:38:57,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:38:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:57,322 INFO L225 Difference]: With dead ends: 40 [2020-10-13 23:38:57,322 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 23:38:57,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 23:38:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 23:38:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:38:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 23:38:57,331 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2020-10-13 23:38:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:57,332 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 23:38:57,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:38:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 23:38:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:38:57,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:57,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:57,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:38:57,334 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:57,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1675123339, now seen corresponding path program 1 times [2020-10-13 23:38:57,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:57,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301434944] [2020-10-13 23:38:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:38:57,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:57,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-13 23:38:57,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:38:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:38:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:38:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:38:57,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:57,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:57,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:38:57,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:57,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:57,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:57,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:38:57,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301434944] [2020-10-13 23:38:57,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:57,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:38:57,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697702725] [2020-10-13 23:38:57,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:38:57,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:57,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:38:57,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:57,645 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-13 23:38:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:57,738 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 23:38:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:38:57,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 23:38:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:57,739 INFO L225 Difference]: With dead ends: 38 [2020-10-13 23:38:57,740 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 23:38:57,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 23:38:57,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-13 23:38:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:38:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 23:38:57,752 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 23:38:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:57,752 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 23:38:57,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:38:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 23:38:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:38:57,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:57,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:57,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:38:57,755 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash 99818017, now seen corresponding path program 1 times [2020-10-13 23:38:57,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:57,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612716560] [2020-10-13 23:38:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:58,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:38:58,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:58,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-13 23:38:58,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:58,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:38:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:38:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:38:58,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:58,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:58,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:58,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:58,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:58,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:38:58,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:58,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:58,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:58,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:38:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:38:58,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612716560] [2020-10-13 23:38:58,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:58,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:38:58,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743481280] [2020-10-13 23:38:58,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:38:58,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:38:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:58,078 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 23:38:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:58,201 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-13 23:38:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:38:58,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 23:38:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:58,204 INFO L225 Difference]: With dead ends: 41 [2020-10-13 23:38:58,205 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:38:58,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:38:58,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-13 23:38:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:38:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 23:38:58,220 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-10-13 23:38:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:58,221 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 23:38:58,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:38:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 23:38:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:38:58,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:58,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:58,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:38:58,227 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:58,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1286613707, now seen corresponding path program 2 times [2020-10-13 23:38:58,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:58,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846870144] [2020-10-13 23:38:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:58,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:58,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:38:58,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:58,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-13 23:38:58,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:58,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:58,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:38:58,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:38:58,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:38:58,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:58,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:58,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:58,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:58,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:58,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:58,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:58,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:38:58,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846870144] [2020-10-13 23:38:58,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:58,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:38:58,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000299462] [2020-10-13 23:38:58,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:38:58,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:58,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:38:58,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:38:58,554 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-13 23:38:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:58,664 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-13 23:38:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:38:58,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 23:38:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:58,666 INFO L225 Difference]: With dead ends: 44 [2020-10-13 23:38:58,667 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 23:38:58,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:38:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 23:38:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-13 23:38:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:38:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 23:38:58,681 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2020-10-13 23:38:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:58,682 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 23:38:58,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:38:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 23:38:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:38:58,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:58,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:58,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:38:58,685 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash 946233825, now seen corresponding path program 3 times [2020-10-13 23:38:58,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:58,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245555105] [2020-10-13 23:38:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:58,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:38:58,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:58,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-13 23:38:58,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:58,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:38:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:38:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:58,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:58,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:58,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:58,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:58,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:58,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:58,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:58,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:38:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:38:58,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245555105] [2020-10-13 23:38:58,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:59,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:38:59,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163069580] [2020-10-13 23:38:59,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:38:59,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:59,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:38:59,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:59,002 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-13 23:38:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:59,100 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-13 23:38:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:38:59,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-13 23:38:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:59,102 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:38:59,102 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:38:59,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:38:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 23:38:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:38:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-13 23:38:59,113 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 26 [2020-10-13 23:38:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:59,113 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-13 23:38:59,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:38:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-13 23:38:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:38:59,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:59,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:59,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:38:59,116 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash 793208451, now seen corresponding path program 4 times [2020-10-13 23:38:59,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:59,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783318126] [2020-10-13 23:38:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:59,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:59,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:38:59,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:59,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-13 23:38:59,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:59,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:59,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:38:59,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:38:59,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:38:59,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:59,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:59,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:59,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:59,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:59,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:59,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:59,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:59,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:38:59,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783318126] [2020-10-13 23:38:59,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:59,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:38:59,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243612242] [2020-10-13 23:38:59,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:38:59,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:38:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:38:59,532 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-10-13 23:38:59,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:59,650 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-13 23:38:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:38:59,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 23:38:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:59,651 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:38:59,651 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:38:59,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:38:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:38:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-13 23:38:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:38:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-13 23:38:59,662 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 28 [2020-10-13 23:38:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:59,662 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-13 23:38:59,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:38:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-13 23:38:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:38:59,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:59,664 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:59,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:38:59,665 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash -711660759, now seen corresponding path program 5 times [2020-10-13 23:38:59,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:59,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247730377] [2020-10-13 23:38:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:59,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:00,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:00,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:39:00,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-13 23:39:00,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:00,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:39:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:39:00,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:00,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:00,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:00,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:00,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:00,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:00,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:00,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:00,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:00,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:00,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:00,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:00,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 23:39:00,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247730377] [2020-10-13 23:39:00,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:00,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:39:00,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367532211] [2020-10-13 23:39:00,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:39:00,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:00,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:39:00,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:39:00,229 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-13 23:39:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:00,346 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-13 23:39:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:39:00,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-13 23:39:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:00,349 INFO L225 Difference]: With dead ends: 64 [2020-10-13 23:39:00,349 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:39:00,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:39:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:39:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 23:39:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:39:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-13 23:39:00,364 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 31 [2020-10-13 23:39:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:00,365 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-13 23:39:00,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:39:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-13 23:39:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:39:00,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:00,369 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:00,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:39:00,369 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:00,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:00,372 INFO L82 PathProgramCache]: Analyzing trace with hash -349733945, now seen corresponding path program 6 times [2020-10-13 23:39:00,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:00,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013355231] [2020-10-13 23:39:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:00,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:00,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:00,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:00,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:39:00,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:00,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-13 23:39:00,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:00,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:00,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:39:00,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:39:00,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:39:00,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:01,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:01,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:01,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:01,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:01,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:39:01,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013355231] [2020-10-13 23:39:01,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:01,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:39:01,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640360847] [2020-10-13 23:39:01,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:39:01,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:01,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:39:01,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:39:01,028 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2020-10-13 23:39:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:01,127 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-13 23:39:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:39:01,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-13 23:39:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:01,129 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:39:01,129 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:39:01,129 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 [2020-10-13 23:39:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:39:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-13 23:39:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:39:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-13 23:39:01,136 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 33 [2020-10-13 23:39:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:01,136 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-13 23:39:01,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:39:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-13 23:39:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:39:01,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:01,137 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:01,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:39:01,138 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash 392142693, now seen corresponding path program 7 times [2020-10-13 23:39:01,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:01,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423197557] [2020-10-13 23:39:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:01,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:01,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:01,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:39:01,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-13 23:39:01,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:01,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:39:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:39:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:39:01,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:01,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:01,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:01,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:01,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:01,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:01,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:01,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:01,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:01,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:01,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:01,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:01,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:39:01,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423197557] [2020-10-13 23:39:01,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:01,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:39:01,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957038598] [2020-10-13 23:39:01,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:39:01,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:01,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:39:01,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:39:01,931 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 9 states. [2020-10-13 23:39:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:02,044 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-13 23:39:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:39:02,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 23:39:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:02,046 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:39:02,046 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:39:02,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:39:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:39:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-13 23:39:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:39:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-13 23:39:02,056 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 36 [2020-10-13 23:39:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:02,058 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-13 23:39:02,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:39:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-13 23:39:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:39:02,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:02,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:02,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:39:02,062 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash -262639865, now seen corresponding path program 8 times [2020-10-13 23:39:02,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:02,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394105088] [2020-10-13 23:39:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:02,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:02,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:39:02,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-13 23:39:02,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:02,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:39:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:39:02,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:03,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:03,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:03,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:03,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:03,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:03,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:03,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:03,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:03,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:03,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:03,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 23:39:03,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394105088] [2020-10-13 23:39:03,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:03,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:39:03,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50838055] [2020-10-13 23:39:03,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:39:03,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:03,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:39:03,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:39:03,028 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2020-10-13 23:39:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:03,107 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-10-13 23:39:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:39:03,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-13 23:39:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:03,108 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:39:03,108 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 23:39:03,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:39:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 23:39:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 23:39:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:39:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-13 23:39:03,123 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 39 [2020-10-13 23:39:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:03,123 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-13 23:39:03,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:39:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-13 23:39:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:39:03,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:03,125 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:03,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:39:03,125 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1419215269, now seen corresponding path program 9 times [2020-10-13 23:39:03,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:03,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939176561] [2020-10-13 23:39:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:04,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:04,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:39:04,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:04,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-13 23:39:04,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:04,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:04,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:39:04,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:39:04,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:39:04,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:04,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:04,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:04,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:04,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:04,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:04,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:04,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:04,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:04,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:04,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:04,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:04,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:39:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:39:04,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939176561] [2020-10-13 23:39:04,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:04,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:39:04,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532964894] [2020-10-13 23:39:04,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:39:04,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:39:04,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:39:04,305 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 10 states. [2020-10-13 23:39:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:04,430 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-13 23:39:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:39:04,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-13 23:39:04,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:04,432 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:39:04,432 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:39:04,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:39:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:39:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-13 23:39:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 23:39:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-13 23:39:04,443 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 41 [2020-10-13 23:39:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:04,444 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-13 23:39:04,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:39:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-13 23:39:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:39:04,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:04,446 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:04,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:39:04,447 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -90544953, now seen corresponding path program 10 times [2020-10-13 23:39:04,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:04,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310647280] [2020-10-13 23:39:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:04,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:04,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:05,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:05,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:39:05,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-13 23:39:05,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:05,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:39:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:39:05,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:05,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:05,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:05,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:05,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:05,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:05,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:05,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:05,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:05,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:05,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 23:39:05,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310647280] [2020-10-13 23:39:05,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:05,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:39:05,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372290614] [2020-10-13 23:39:05,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:39:05,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:39:05,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:39:05,674 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 8 states. [2020-10-13 23:39:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:05,775 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-10-13 23:39:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:39:05,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-13 23:39:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:05,777 INFO L225 Difference]: With dead ends: 86 [2020-10-13 23:39:05,778 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:39:05,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:39:05,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:39:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 23:39:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:39:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-13 23:39:05,792 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 44 [2020-10-13 23:39:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:05,792 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-13 23:39:05,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:39:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-13 23:39:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:39:05,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:05,795 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:05,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:39:05,796 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:05,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:05,797 INFO L82 PathProgramCache]: Analyzing trace with hash 714360041, now seen corresponding path program 11 times [2020-10-13 23:39:05,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:05,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20594366] [2020-10-13 23:39:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:05,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:05,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:07,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:07,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:39:07,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1498 [2020-10-13 23:39:07,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:07,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:39:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:39:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:39:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:07,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:07,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:07,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:07,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:07,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:07,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:07,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:07,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:07,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:07,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:07,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:39:07,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20594366] [2020-10-13 23:39:07,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:07,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:39:07,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004534669] [2020-10-13 23:39:07,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:39:07,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:07,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:39:07,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:39:07,417 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 11 states. [2020-10-13 23:39:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:07,562 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-10-13 23:39:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:39:07,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-13 23:39:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:07,564 INFO L225 Difference]: With dead ends: 67 [2020-10-13 23:39:07,564 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:39:07,567 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 [2020-10-13 23:39:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:39:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-13 23:39:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:39:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-13 23:39:07,582 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2020-10-13 23:39:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:07,583 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-13 23:39:07,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:39:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-13 23:39:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:39:07,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:07,584 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:07,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:39:07,584 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:07,585 INFO L82 PathProgramCache]: Analyzing trace with hash -337532157, now seen corresponding path program 12 times [2020-10-13 23:39:07,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:07,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480991453] [2020-10-13 23:39:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:07,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:07,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:08,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:39:08,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:08,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-13 23:39:08,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:08,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:08,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:39:08,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:08,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:39:08,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:08,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:08,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:08,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:08,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:08,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:08,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:08,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:08,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 23:39:09,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480991453] [2020-10-13 23:39:09,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:09,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:39:09,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156064645] [2020-10-13 23:39:09,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:39:09,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:39:09,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:39:09,005 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2020-10-13 23:39:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:09,079 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-10-13 23:39:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:39:09,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-13 23:39:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:09,081 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:39:09,081 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:39:09,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:39:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:39:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 23:39:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:39:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-13 23:39:09,089 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 49 [2020-10-13 23:39:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:09,089 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-13 23:39:09,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:39:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-13 23:39:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:39:09,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:09,090 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:09,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:39:09,091 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1192792097, now seen corresponding path program 13 times [2020-10-13 23:39:09,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:09,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958417752] [2020-10-13 23:39:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:09,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:09,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:10,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:39:10,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:10,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-13 23:39:10,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:10,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:10,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:39:10,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:39:10,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:39:10,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:10,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:10,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:10,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:10,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:10,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:10,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:10,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:39:10,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958417752] [2020-10-13 23:39:10,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:10,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:39:10,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475478187] [2020-10-13 23:39:10,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:39:10,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:39:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:10,801 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2020-10-13 23:39:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:10,882 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-10-13 23:39:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:39:10,883 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 23:39:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:10,883 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:39:10,884 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:39:10,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:39:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-13 23:39:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:39:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-13 23:39:10,898 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 51 [2020-10-13 23:39:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:10,898 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-13 23:39:10,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:39:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-13 23:39:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:39:10,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:10,899 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:10,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:39:10,900 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1930360011, now seen corresponding path program 14 times [2020-10-13 23:39:10,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:10,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013973666] [2020-10-13 23:39:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:12,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:12,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:39:12,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1618 [2020-10-13 23:39:12,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:12,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:39:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:39:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:39:12,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:12,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:12,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:12,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:12,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:12,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:12,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:12,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:12,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:12,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:12,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:12,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:12,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:39:12,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013973666] [2020-10-13 23:39:12,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:12,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:39:12,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350275150] [2020-10-13 23:39:12,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:39:12,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:39:12,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:12,667 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2020-10-13 23:39:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:12,804 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2020-10-13 23:39:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:39:12,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-13 23:39:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:12,806 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:39:12,807 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:39:12,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:39:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-13 23:39:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:39:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-13 23:39:12,821 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 54 [2020-10-13 23:39:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:12,821 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-13 23:39:12,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:39:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-13 23:39:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:39:12,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:12,822 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:12,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:39:12,823 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1763399649, now seen corresponding path program 15 times [2020-10-13 23:39:12,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:12,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814738068] [2020-10-13 23:39:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:12,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:14,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:39:14,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:14,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1943 [2020-10-13 23:39:14,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:14,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:39:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:14,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:39:14,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:14,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:14,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:14,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:14,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:14,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:14,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:14,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:14,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:14,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 23:39:14,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814738068] [2020-10-13 23:39:14,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:14,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:39:14,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473912879] [2020-10-13 23:39:14,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:39:14,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:14,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:39:14,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:39:14,849 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 10 states. [2020-10-13 23:39:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:14,908 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2020-10-13 23:39:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:39:14,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-13 23:39:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:14,909 INFO L225 Difference]: With dead ends: 108 [2020-10-13 23:39:14,909 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:39:14,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:39:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:39:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 23:39:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:39:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-10-13 23:39:14,914 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 57 [2020-10-13 23:39:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:14,914 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-10-13 23:39:14,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:39:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-10-13 23:39:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:39:14,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:14,915 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:14,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:39:14,915 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:14,916 INFO L82 PathProgramCache]: Analyzing trace with hash -979222785, now seen corresponding path program 16 times [2020-10-13 23:39:14,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:14,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851268903] [2020-10-13 23:39:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:17,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:17,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:39:17,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:17,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2179 [2020-10-13 23:39:17,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:17,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:39:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:39:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:39:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:17,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:17,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:17,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:17,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:17,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:17,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:17,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:17,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:17,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:39:17,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851268903] [2020-10-13 23:39:17,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:17,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:39:17,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381215323] [2020-10-13 23:39:17,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:39:17,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:39:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:17,257 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 14 states. [2020-10-13 23:39:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:17,347 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2020-10-13 23:39:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:39:17,347 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 23:39:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:17,348 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:39:17,348 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:39:17,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:39:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-13 23:39:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:39:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-13 23:39:17,353 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2020-10-13 23:39:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:17,353 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-13 23:39:17,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:39:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-13 23:39:17,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:39:17,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:17,357 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:17,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:39:17,357 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:17,357 INFO L82 PathProgramCache]: Analyzing trace with hash -882675411, now seen corresponding path program 17 times [2020-10-13 23:39:17,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:17,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112984071] [2020-10-13 23:39:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:17,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:20,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:20,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:39:20,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:20,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2680 [2020-10-13 23:39:20,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:20,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:39:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:39:20,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:20,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:20,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:20,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:20,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:20,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:20,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:20,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:20,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:20,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:20,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 23:39:20,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112984071] [2020-10-13 23:39:20,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:20,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:39:20,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364686645] [2020-10-13 23:39:20,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:39:20,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:20,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:39:20,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:39:20,137 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 11 states. [2020-10-13 23:39:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:20,225 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2020-10-13 23:39:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:39:20,225 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-13 23:39:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:20,226 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:39:20,227 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:39:20,227 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 [2020-10-13 23:39:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:39:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-13 23:39:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:39:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-13 23:39:20,233 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 62 [2020-10-13 23:39:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:20,234 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-13 23:39:20,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:39:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-13 23:39:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:39:20,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:20,237 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:20,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:39:20,237 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1253684017, now seen corresponding path program 18 times [2020-10-13 23:39:20,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:20,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607555659] [2020-10-13 23:39:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:20,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:22,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:22,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:39:22,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:22,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2288 [2020-10-13 23:39:22,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:22,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:22,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:39:22,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:39:22,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:39:22,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:22,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:22,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:22,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:22,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:22,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:22,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:22,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:22,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:22,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:22,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:22,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:39:22,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607555659] [2020-10-13 23:39:22,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:22,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:39:22,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580051750] [2020-10-13 23:39:22,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:39:22,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:22,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:39:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:39:22,705 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 15 states. [2020-10-13 23:39:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:22,888 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-10-13 23:39:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:39:22,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-13 23:39:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:22,890 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:39:22,890 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:39:22,891 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 [2020-10-13 23:39:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:39:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-13 23:39:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:39:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-10-13 23:39:22,895 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 64 [2020-10-13 23:39:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:22,896 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-10-13 23:39:22,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:39:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-10-13 23:39:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:39:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:22,897 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:22,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:39:22,898 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash 260493661, now seen corresponding path program 19 times [2020-10-13 23:39:22,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:22,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484693858] [2020-10-13 23:39:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:22,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:22,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:25,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:39:25,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:25,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2796 [2020-10-13 23:39:25,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:25,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:25,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:39:25,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:39:25,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:39:25,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:25,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:25,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:25,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:25,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:25,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:25,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:25,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:25,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:25,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:25,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:25,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:39:25,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484693858] [2020-10-13 23:39:25,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:25,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:39:25,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374940950] [2020-10-13 23:39:25,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:39:25,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:25,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:39:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:39:25,869 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 16 states. [2020-10-13 23:39:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:26,006 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-13 23:39:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:39:26,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-13 23:39:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:26,007 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:39:26,007 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:39:26,008 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 [2020-10-13 23:39:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:39:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-13 23:39:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:39:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2020-10-13 23:39:26,012 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 67 [2020-10-13 23:39:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:26,012 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2020-10-13 23:39:26,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:39:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2020-10-13 23:39:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:39:26,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:26,013 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:26,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:39:26,014 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash -913810929, now seen corresponding path program 20 times [2020-10-13 23:39:26,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:26,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323460418] [2020-10-13 23:39:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:26,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:26,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:28,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:28,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:39:28,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:28,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2485 [2020-10-13 23:39:28,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:28,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:39:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:39:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:28,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:28,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:28,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:28,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:28,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:28,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:28,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:28,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:28,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:28,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:28,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 23:39:28,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323460418] [2020-10-13 23:39:28,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:28,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:39:28,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218878279] [2020-10-13 23:39:28,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:39:28,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:39:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:28,666 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand 12 states. [2020-10-13 23:39:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:28,777 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2020-10-13 23:39:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:39:28,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-10-13 23:39:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:28,778 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:39:28,778 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:39:28,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:39:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 23:39:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:39:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2020-10-13 23:39:28,782 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 70 [2020-10-13 23:39:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:28,782 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2020-10-13 23:39:28,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:39:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2020-10-13 23:39:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:39:28,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:28,783 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:28,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:39:28,784 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash 263091121, now seen corresponding path program 21 times [2020-10-13 23:39:28,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:28,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369982176] [2020-10-13 23:39:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:28,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:32,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:32,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:39:32,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:32,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3818 [2020-10-13 23:39:32,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:32,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:32,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:39:32,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:39:32,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:39:32,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:32,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:32,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:32,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:32,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:32,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:32,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:32,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:39:32,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369982176] [2020-10-13 23:39:32,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:32,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:39:32,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901450288] [2020-10-13 23:39:32,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:39:32,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:39:32,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:39:32,789 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 17 states. [2020-10-13 23:39:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:32,942 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-13 23:39:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:39:32,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-13 23:39:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:32,943 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:39:32,943 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:39:32,944 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 [2020-10-13 23:39:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:39:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-13 23:39:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:39:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-10-13 23:39:32,950 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 72 [2020-10-13 23:39:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:32,950 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-10-13 23:39:32,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:39:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-10-13 23:39:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:39:32,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:32,951 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:32,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:39:32,954 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash -842291397, now seen corresponding path program 22 times [2020-10-13 23:39:32,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:32,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958343074] [2020-10-13 23:39:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:32,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:32,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:36,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:39:36,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:36,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3162 [2020-10-13 23:39:36,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:36,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:36,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:39:36,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:36,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:39:36,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:36,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:36,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:36,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:36,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:36,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:36,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:36,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:36,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:36,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:36,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 23:39:36,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958343074] [2020-10-13 23:39:36,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:36,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:39:36,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570365247] [2020-10-13 23:39:36,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:39:36,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:39:36,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:36,235 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 13 states. [2020-10-13 23:39:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:36,345 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2020-10-13 23:39:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:39:36,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-10-13 23:39:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:36,347 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:39:36,347 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:39:36,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:39:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 23:39:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:39:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2020-10-13 23:39:36,352 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 75 [2020-10-13 23:39:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:36,352 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2020-10-13 23:39:36,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:39:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2020-10-13 23:39:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:39:36,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:36,353 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:36,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:39:36,354 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash 754860761, now seen corresponding path program 23 times [2020-10-13 23:39:36,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:36,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045857034] [2020-10-13 23:39:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:36,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:40,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:39:40,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:40,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3703 [2020-10-13 23:39:40,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:40,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:40,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:39:40,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:39:40,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:39:40,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:40,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:40,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:40,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:40,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:40,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:40,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:40,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:40,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:40,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:40,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:40,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:39:40,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045857034] [2020-10-13 23:39:40,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:40,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:39:40,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836988625] [2020-10-13 23:39:40,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:39:40,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:40,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:39:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:39:40,263 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 18 states. [2020-10-13 23:39:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:40,447 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-10-13 23:39:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:39:40,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-10-13 23:39:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:40,448 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:39:40,448 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:39:40,449 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 [2020-10-13 23:39:40,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:39:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-13 23:39:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:39:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2020-10-13 23:39:40,452 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 77 [2020-10-13 23:39:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:40,453 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2020-10-13 23:39:40,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:39:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2020-10-13 23:39:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:39:40,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:40,454 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:40,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:39:40,454 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash -666392813, now seen corresponding path program 24 times [2020-10-13 23:39:40,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:40,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682055762] [2020-10-13 23:39:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:40,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:44,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:44,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:39:44,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:44,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4013 [2020-10-13 23:39:44,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:44,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:44,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:39:44,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:44,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:39:44,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:44,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:44,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:44,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:44,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:44,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:44,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:44,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:44,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:44,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 23:39:44,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682055762] [2020-10-13 23:39:44,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:44,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:39:44,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210209165] [2020-10-13 23:39:44,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:39:44,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:44,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:39:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:44,607 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 14 states. [2020-10-13 23:39:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:44,684 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2020-10-13 23:39:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:39:44,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-13 23:39:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:44,686 INFO L225 Difference]: With dead ends: 146 [2020-10-13 23:39:44,686 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:39:44,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:39:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-13 23:39:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 23:39:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-10-13 23:39:44,691 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 80 [2020-10-13 23:39:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:44,691 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-10-13 23:39:44,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:39:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-10-13 23:39:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:39:44,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:44,693 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:44,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:39:44,693 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1256481227, now seen corresponding path program 25 times [2020-10-13 23:39:44,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:44,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626578850] [2020-10-13 23:39:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:44,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:44,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:47,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:39:47,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:47,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2671 [2020-10-13 23:39:47,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:47,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:47,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:39:47,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:39:47,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:39:47,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:47,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:47,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:47,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:47,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:47,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:47,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:47,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:47,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:47,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:47,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:47,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:39:47,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626578850] [2020-10-13 23:39:47,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:47,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:39:47,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137226994] [2020-10-13 23:39:47,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:39:47,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:39:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:39:47,579 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 19 states. [2020-10-13 23:39:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:47,765 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-13 23:39:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:39:47,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-10-13 23:39:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:47,767 INFO L225 Difference]: With dead ends: 103 [2020-10-13 23:39:47,768 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:39:47,768 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 [2020-10-13 23:39:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:39:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-13 23:39:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:39:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2020-10-13 23:39:47,773 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 82 [2020-10-13 23:39:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:47,774 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2020-10-13 23:39:47,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:39:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2020-10-13 23:39:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 23:39:47,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:47,775 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:47,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:39:47,775 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:47,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1466810825, now seen corresponding path program 26 times [2020-10-13 23:39:47,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:47,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004791488] [2020-10-13 23:39:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:47,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:50,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:50,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:39:50,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:50,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2964 [2020-10-13 23:39:50,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:50,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:50,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:39:50,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:39:50,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:39:50,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:50,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:50,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:50,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:50,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:50,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:50,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:50,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:50,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:50,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:50,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:50,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:50,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:39:50,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004791488] [2020-10-13 23:39:50,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:50,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:39:50,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888524189] [2020-10-13 23:39:50,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:39:50,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:39:50,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:39:50,985 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 20 states. [2020-10-13 23:39:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:51,173 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2020-10-13 23:39:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:39:51,173 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-13 23:39:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:51,174 INFO L225 Difference]: With dead ends: 106 [2020-10-13 23:39:51,175 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:39:51,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:39:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:39:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-13 23:39:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:39:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-10-13 23:39:51,179 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 85 [2020-10-13 23:39:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:51,179 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-10-13 23:39:51,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:39:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-10-13 23:39:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 23:39:51,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:51,180 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:51,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:39:51,181 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1038579979, now seen corresponding path program 27 times [2020-10-13 23:39:51,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:51,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454151103] [2020-10-13 23:39:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:51,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:54,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:54,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 23:39:54,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:54,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3309 [2020-10-13 23:39:54,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:54,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:39:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:39:54,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:54,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:54,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:54,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:54,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:54,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:54,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:54,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:54,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:54,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:54,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:54,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 23:39:54,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454151103] [2020-10-13 23:39:54,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:54,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:39:54,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433922656] [2020-10-13 23:39:54,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:39:54,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:39:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:39:54,626 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 15 states. [2020-10-13 23:39:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:54,720 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2020-10-13 23:39:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:39:54,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 88 [2020-10-13 23:39:54,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:54,721 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:39:54,721 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:39:54,722 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 [2020-10-13 23:39:54,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:39:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 23:39:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 23:39:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-10-13 23:39:54,733 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 88 [2020-10-13 23:39:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:54,734 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-10-13 23:39:54,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:39:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-10-13 23:39:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 23:39:54,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:54,735 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:54,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:39:54,737 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash -736347113, now seen corresponding path program 28 times [2020-10-13 23:39:54,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:54,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147009571] [2020-10-13 23:39:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:54,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:54,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:58,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 23:39:58,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:39:58,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3828 [2020-10-13 23:39:58,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:58,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:39:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:39:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:39:58,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:58,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:58,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:58,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:58,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:58,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:58,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:58,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:58,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:58,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:39:58,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147009571] [2020-10-13 23:39:58,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:58,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:39:58,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847779161] [2020-10-13 23:39:58,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:39:58,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:39:58,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:39:58,826 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 21 states. [2020-10-13 23:39:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:59,017 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2020-10-13 23:39:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:39:59,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2020-10-13 23:39:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:59,019 INFO L225 Difference]: With dead ends: 111 [2020-10-13 23:39:59,019 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 23:39:59,020 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 [2020-10-13 23:39:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 23:39:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-13 23:39:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:39:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2020-10-13 23:39:59,025 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 90 [2020-10-13 23:39:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:59,025 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2020-10-13 23:39:59,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:39:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2020-10-13 23:39:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 23:39:59,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:59,027 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:59,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:39:59,027 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1901542677, now seen corresponding path program 29 times [2020-10-13 23:39:59,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:59,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763527530] [2020-10-13 23:39:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:59,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:59,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:40:04,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:04,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:04,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:04,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:04,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:04,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:04,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:04,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:04,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 23:40:04,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763527530] [2020-10-13 23:40:04,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:04,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:40:04,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80048189] [2020-10-13 23:40:04,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:40:04,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:40:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:40:04,192 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 16 states. [2020-10-13 23:40:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:04,315 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2020-10-13 23:40:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:40:04,315 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2020-10-13 23:40:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:04,317 INFO L225 Difference]: With dead ends: 168 [2020-10-13 23:40:04,317 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:40:04,318 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 [2020-10-13 23:40:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:40:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 23:40:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:40:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2020-10-13 23:40:04,322 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 93 [2020-10-13 23:40:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:04,323 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2020-10-13 23:40:04,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:40:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2020-10-13 23:40:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:40:04,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:04,324 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:04,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:40:04,324 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1080126771, now seen corresponding path program 30 times [2020-10-13 23:40:04,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:04,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483621994] [2020-10-13 23:40:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:09,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:40:09,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:09,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:40:09,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:09,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:09,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:40:09,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:40:09,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:40:09,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:09,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:09,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:09,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:09,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:09,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:09,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:09,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:09,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:09,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:09,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:09,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 23:40:09,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483621994] [2020-10-13 23:40:09,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:09,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:40:09,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583114827] [2020-10-13 23:40:09,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:40:09,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:40:09,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:40:09,596 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand 22 states. [2020-10-13 23:40:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:09,805 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2020-10-13 23:40:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:40:09,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 95 [2020-10-13 23:40:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:09,807 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:40:09,807 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:40:09,808 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 [2020-10-13 23:40:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:40:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-10-13 23:40:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:40:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2020-10-13 23:40:09,813 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 95 [2020-10-13 23:40:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:09,813 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2020-10-13 23:40:09,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:40:09,814 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2020-10-13 23:40:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 23:40:09,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:09,814 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:09,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:40:09,815 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash -112908679, now seen corresponding path program 31 times [2020-10-13 23:40:09,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:09,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596727406] [2020-10-13 23:40:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:09,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:14,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 23:40:14,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:14,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:40:14,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:14,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:40:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:40:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:40:14,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:15,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:15,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:15,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:15,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:40:15,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:15,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:15,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:15,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:15,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:15,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 23:40:15,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596727406] [2020-10-13 23:40:15,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:15,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:40:15,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441183779] [2020-10-13 23:40:15,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:40:15,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:15,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:40:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:40:15,108 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 23 states. [2020-10-13 23:40:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:15,254 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2020-10-13 23:40:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:40:15,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-10-13 23:40:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:15,255 INFO L225 Difference]: With dead ends: 119 [2020-10-13 23:40:15,255 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 23:40:15,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:40:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 23:40:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-13 23:40:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:40:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2020-10-13 23:40:15,262 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 98 [2020-10-13 23:40:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:15,262 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2020-10-13 23:40:15,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:40:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2020-10-13 23:40:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:40:15,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:15,263 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:15,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:40:15,264 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash -977625229, now seen corresponding path program 32 times [2020-10-13 23:40:15,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:15,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196615258] [2020-10-13 23:40:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:15,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:20,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:40:20,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:20,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:40:20,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:20,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:40:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:40:20,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:20,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:20,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:20,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:20,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:20,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:20,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 23:40:20,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196615258] [2020-10-13 23:40:20,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:20,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:40:20,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24849354] [2020-10-13 23:40:20,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:40:20,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:40:20,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:40:20,444 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand 17 states. [2020-10-13 23:40:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:20,580 INFO L93 Difference]: Finished difference Result 182 states and 226 transitions. [2020-10-13 23:40:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:40:20,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-10-13 23:40:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:20,582 INFO L225 Difference]: With dead ends: 182 [2020-10-13 23:40:20,582 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:40:20,583 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 [2020-10-13 23:40:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:40:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 23:40:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:40:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2020-10-13 23:40:20,589 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 101 [2020-10-13 23:40:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:20,589 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2020-10-13 23:40:20,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:40:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2020-10-13 23:40:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:40:20,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:20,590 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:20,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:40:20,591 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:20,591 INFO L82 PathProgramCache]: Analyzing trace with hash 530174353, now seen corresponding path program 33 times [2020-10-13 23:40:20,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:20,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89585578] [2020-10-13 23:40:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:25,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:25,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:40:25,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:25,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:40:25,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:25,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:40:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:40:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:40:25,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:25,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:25,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:25,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:25,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:25,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:25,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:25,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:25,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:25,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:25,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:25,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:25,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 23:40:25,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89585578] [2020-10-13 23:40:25,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:25,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:40:25,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381608518] [2020-10-13 23:40:25,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:40:25,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:40:25,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:40:25,895 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand 24 states. [2020-10-13 23:40:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:26,131 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2020-10-13 23:40:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:40:26,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 103 [2020-10-13 23:40:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:26,133 INFO L225 Difference]: With dead ends: 124 [2020-10-13 23:40:26,133 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 23:40:26,134 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 [2020-10-13 23:40:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 23:40:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2020-10-13 23:40:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 23:40:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2020-10-13 23:40:26,141 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 103 [2020-10-13 23:40:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:26,142 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2020-10-13 23:40:26,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:40:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2020-10-13 23:40:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 23:40:26,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:26,144 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:26,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:40:26,144 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:26,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1554840923, now seen corresponding path program 34 times [2020-10-13 23:40:26,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:26,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717447059] [2020-10-13 23:40:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:26,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:31,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 23:40:31,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:31,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:40:31,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:31,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:40:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:40:31,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:31,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:31,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:31,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 23:40:31,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717447059] [2020-10-13 23:40:31,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:31,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:40:31,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608981380] [2020-10-13 23:40:31,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:40:31,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:31,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:40:31,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:40:31,331 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 18 states. [2020-10-13 23:40:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:31,479 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2020-10-13 23:40:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:40:31,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 106 [2020-10-13 23:40:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:31,481 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:40:31,481 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:40:31,482 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 [2020-10-13 23:40:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:40:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-13 23:40:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 23:40:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-10-13 23:40:31,488 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 106 [2020-10-13 23:40:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:31,488 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-10-13 23:40:31,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:40:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-10-13 23:40:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 23:40:31,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:31,489 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:31,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:40:31,490 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:31,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:31,490 INFO L82 PathProgramCache]: Analyzing trace with hash -609325571, now seen corresponding path program 35 times [2020-10-13 23:40:31,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:31,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392280291] [2020-10-13 23:40:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:31,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:36,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:36,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 23:40:36,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:36,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:40:36,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:36,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:40:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:40:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:40:36,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:36,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:36,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:36,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:36,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:36,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:36,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:36,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:36,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 23:40:36,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392280291] [2020-10-13 23:40:36,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:36,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:40:36,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799467036] [2020-10-13 23:40:36,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:40:36,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:40:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:36,826 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 25 states. [2020-10-13 23:40:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:37,045 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2020-10-13 23:40:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:40:37,045 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 108 [2020-10-13 23:40:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:37,046 INFO L225 Difference]: With dead ends: 129 [2020-10-13 23:40:37,046 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 23:40:37,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 23:40:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-10-13 23:40:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 23:40:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2020-10-13 23:40:37,051 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 108 [2020-10-13 23:40:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:37,051 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2020-10-13 23:40:37,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:40:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2020-10-13 23:40:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 23:40:37,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:37,052 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:37,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:40:37,053 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2134112623, now seen corresponding path program 36 times [2020-10-13 23:40:37,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:37,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532163939] [2020-10-13 23:40:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:37,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:42,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:42,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 23:40:42,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:42,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:40:42,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:42,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:40:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:40:42,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:42,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:42,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:42,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:42,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:42,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:42,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:42,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:42,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:40:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 23:40:42,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532163939] [2020-10-13 23:40:42,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:42,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:40:42,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881299587] [2020-10-13 23:40:42,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:40:42,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:40:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:40:42,271 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand 19 states. [2020-10-13 23:40:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:42,409 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2020-10-13 23:40:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:40:42,410 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2020-10-13 23:40:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:42,411 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:40:42,411 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:40:42,412 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 [2020-10-13 23:40:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:40:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-13 23:40:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:40:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2020-10-13 23:40:42,417 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 111 [2020-10-13 23:40:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:42,417 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2020-10-13 23:40:42,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:40:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2020-10-13 23:40:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 23:40:42,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:42,418 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:42,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:40:42,418 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1812569613, now seen corresponding path program 37 times [2020-10-13 23:40:42,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:42,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312785279] [2020-10-13 23:40:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:42,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:42,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:47,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:47,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 23:40:47,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:47,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:40:47,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:47,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:40:47,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:40:47,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:40:47,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:47,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:47,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:47,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:47,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:47,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:47,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:47,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:47,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:47,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:47,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 23:40:47,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312785279] [2020-10-13 23:40:47,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:47,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:40:47,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15870973] [2020-10-13 23:40:47,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:40:47,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:47,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:40:47,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:47,787 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand 26 states. [2020-10-13 23:40:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:47,998 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2020-10-13 23:40:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:40:47,998 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 113 [2020-10-13 23:40:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:48,000 INFO L225 Difference]: With dead ends: 134 [2020-10-13 23:40:48,000 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 23:40:48,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 23:40:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-13 23:40:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 23:40:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2020-10-13 23:40:48,010 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 113 [2020-10-13 23:40:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:48,010 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2020-10-13 23:40:48,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:40:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2020-10-13 23:40:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 23:40:48,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:48,011 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:48,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:40:48,011 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1657933663, now seen corresponding path program 38 times [2020-10-13 23:40:48,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:48,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69550542] [2020-10-13 23:40:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:48,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:48,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:53,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:53,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 23:40:53,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:53,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:40:53,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:53,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:53,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:40:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:40:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:40:53,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:53,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:53,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:53,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:53,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:53,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:53,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:40:53,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:53,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:53,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 23:40:53,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69550542] [2020-10-13 23:40:53,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:53,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:40:53,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109990026] [2020-10-13 23:40:53,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:40:53,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:53,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:40:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:40:53,413 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand 27 states. [2020-10-13 23:40:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:53,666 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2020-10-13 23:40:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:40:53,667 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 116 [2020-10-13 23:40:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:53,668 INFO L225 Difference]: With dead ends: 137 [2020-10-13 23:40:53,668 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 23:40:53,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:40:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 23:40:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-13 23:40:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:40:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2020-10-13 23:40:53,676 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 116 [2020-10-13 23:40:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:53,676 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2020-10-13 23:40:53,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:40:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2020-10-13 23:40:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:40:53,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:53,678 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:53,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:40:53,678 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:53,679 INFO L82 PathProgramCache]: Analyzing trace with hash -896711475, now seen corresponding path program 39 times [2020-10-13 23:40:53,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:53,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902764379] [2020-10-13 23:40:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:54,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:58,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:58,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:40:58,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:40:58,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:40:58,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:58,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:40:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:40:58,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:58,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:58,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:58,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:58,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:58,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:58,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:58,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:58,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 23:40:58,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902764379] [2020-10-13 23:40:58,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:58,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:40:58,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550135182] [2020-10-13 23:40:58,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:40:58,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:58,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:40:58,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:40:58,957 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand 20 states. [2020-10-13 23:40:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:59,139 INFO L93 Difference]: Finished difference Result 212 states and 264 transitions. [2020-10-13 23:40:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:40:59,139 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-10-13 23:40:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:59,141 INFO L225 Difference]: With dead ends: 212 [2020-10-13 23:40:59,141 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:40:59,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:40:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:40:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-13 23:40:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 23:40:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2020-10-13 23:40:59,149 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 119 [2020-10-13 23:40:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:59,150 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2020-10-13 23:40:59,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:40:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2020-10-13 23:40:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 23:40:59,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:59,152 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:59,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:40:59,152 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:59,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1807444843, now seen corresponding path program 40 times [2020-10-13 23:40:59,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:59,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591217251] [2020-10-13 23:40:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:59,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:59,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:04,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:04,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 23:41:04,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:04,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:41:04,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:04,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:04,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:41:04,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:41:04,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:41:04,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:04,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:04,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:04,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:04,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:04,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:04,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:04,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:04,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:04,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:04,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:04,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 23:41:04,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591217251] [2020-10-13 23:41:04,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:04,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:41:04,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480106457] [2020-10-13 23:41:04,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:41:04,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:04,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:41:04,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:41:04,590 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand 28 states. [2020-10-13 23:41:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:04,845 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2020-10-13 23:41:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:41:04,846 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 121 [2020-10-13 23:41:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:04,847 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:41:04,847 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:41:04,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:41:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:41:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-13 23:41:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 23:41:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-10-13 23:41:04,853 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 121 [2020-10-13 23:41:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:04,853 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-10-13 23:41:04,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:41:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-10-13 23:41:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 23:41:04,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:04,855 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:04,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:41:04,855 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:04,855 INFO L82 PathProgramCache]: Analyzing trace with hash -690234047, now seen corresponding path program 41 times [2020-10-13 23:41:04,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:04,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627260072] [2020-10-13 23:41:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:05,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:09,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:09,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 23:41:09,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:09,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:41:09,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:09,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:41:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:41:09,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:10,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:10,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:10,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:10,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:10,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:10,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:10,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:10,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:10,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:10,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:10,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:10,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 23:41:10,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627260072] [2020-10-13 23:41:10,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:10,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:41:10,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579305106] [2020-10-13 23:41:10,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:41:10,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:41:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:41:10,110 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 21 states. [2020-10-13 23:41:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:10,266 INFO L93 Difference]: Finished difference Result 220 states and 274 transitions. [2020-10-13 23:41:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:41:10,267 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 124 [2020-10-13 23:41:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:10,268 INFO L225 Difference]: With dead ends: 220 [2020-10-13 23:41:10,269 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 23:41:10,270 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 [2020-10-13 23:41:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 23:41:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-13 23:41:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 23:41:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 158 transitions. [2020-10-13 23:41:10,275 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 158 transitions. Word has length 124 [2020-10-13 23:41:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:10,275 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 158 transitions. [2020-10-13 23:41:10,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:41:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 158 transitions. [2020-10-13 23:41:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 23:41:10,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:10,276 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:10,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:41:10,277 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:10,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1473042077, now seen corresponding path program 42 times [2020-10-13 23:41:10,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:10,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504296585] [2020-10-13 23:41:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:10,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:10,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:15,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 23:41:15,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:15,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:41:15,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:15,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:41:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:41:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:41:15,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:15,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:15,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:15,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:15,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:15,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:15,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 23:41:15,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504296585] [2020-10-13 23:41:15,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:15,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:41:15,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945272952] [2020-10-13 23:41:15,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:41:15,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:15,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:41:15,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:41:15,724 INFO L87 Difference]: Start difference. First operand 131 states and 158 transitions. Second operand 29 states. [2020-10-13 23:41:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:15,988 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-10-13 23:41:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:41:15,989 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 126 [2020-10-13 23:41:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:15,991 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:41:15,991 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:41:15,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:41:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:41:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-13 23:41:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 23:41:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 162 transitions. [2020-10-13 23:41:15,997 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 162 transitions. Word has length 126 [2020-10-13 23:41:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:15,998 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 162 transitions. [2020-10-13 23:41:15,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:41:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 162 transitions. [2020-10-13 23:41:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 23:41:15,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:15,999 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:15,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:41:15,999 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1990214583, now seen corresponding path program 43 times [2020-10-13 23:41:16,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:16,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353167500] [2020-10-13 23:41:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:16,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:16,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:21,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 23:41:21,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:21,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:41:21,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:21,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:41:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:41:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:41:21,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:21,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:21,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:21,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:21,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:21,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:21,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:21,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:21,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:21,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:21,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:21,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 23:41:21,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353167500] [2020-10-13 23:41:21,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:21,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:41:21,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610159216] [2020-10-13 23:41:21,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:41:21,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:21,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:41:21,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:41:21,499 INFO L87 Difference]: Start difference. First operand 134 states and 162 transitions. Second operand 30 states. [2020-10-13 23:41:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:21,781 INFO L93 Difference]: Finished difference Result 150 states and 181 transitions. [2020-10-13 23:41:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:41:21,781 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 129 [2020-10-13 23:41:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:21,783 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:41:21,784 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:41:21,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:41:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:41:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-13 23:41:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 23:41:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2020-10-13 23:41:21,790 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 129 [2020-10-13 23:41:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:21,790 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2020-10-13 23:41:21,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:41:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2020-10-13 23:41:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 23:41:21,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:21,791 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:21,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:41:21,792 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1266317219, now seen corresponding path program 44 times [2020-10-13 23:41:21,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:21,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139295052] [2020-10-13 23:41:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:21,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:22,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:26,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:26,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 23:41:26,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:26,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 23:41:26,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:26,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:41:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:41:26,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:27,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:27,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:27,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:27,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:27,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:27,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:27,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:27,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:27,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:27,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:27,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:27,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 23:41:27,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139295052] [2020-10-13 23:41:27,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:27,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:41:27,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857149520] [2020-10-13 23:41:27,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:41:27,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:41:27,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:41:27,086 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand 22 states. [2020-10-13 23:41:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:27,193 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2020-10-13 23:41:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:41:27,193 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2020-10-13 23:41:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:27,194 INFO L225 Difference]: With dead ends: 234 [2020-10-13 23:41:27,194 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 23:41:27,195 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 [2020-10-13 23:41:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 23:41:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-13 23:41:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 23:41:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2020-10-13 23:41:27,201 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 132 [2020-10-13 23:41:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:27,201 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2020-10-13 23:41:27,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:41:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2020-10-13 23:41:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 23:41:27,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:27,202 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:27,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:41:27,203 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash -673414715, now seen corresponding path program 45 times [2020-10-13 23:41:27,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:27,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531771863] [2020-10-13 23:41:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:27,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:28,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:32,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:32,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 23:41:32,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:32,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:41:32,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:32,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:41:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:41:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 23:41:32,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:32,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:32,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:32,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:32,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:32,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:32,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:32,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:32,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:32,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:32,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:32,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:32,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:41:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1441 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 23:41:32,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531771863] [2020-10-13 23:41:32,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:32,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:41:32,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999787178] [2020-10-13 23:41:32,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:41:32,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:32,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:41:32,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:41:32,768 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand 31 states. [2020-10-13 23:41:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:33,043 INFO L93 Difference]: Finished difference Result 155 states and 187 transitions. [2020-10-13 23:41:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:41:33,044 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 134 [2020-10-13 23:41:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:33,045 INFO L225 Difference]: With dead ends: 155 [2020-10-13 23:41:33,046 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 23:41:33,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:41:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 23:41:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-13 23:41:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:41:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 172 transitions. [2020-10-13 23:41:33,054 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 172 transitions. Word has length 134 [2020-10-13 23:41:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:33,054 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 172 transitions. [2020-10-13 23:41:33,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:41:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 172 transitions. [2020-10-13 23:41:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:41:33,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:33,056 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:33,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:41:33,056 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash -180096857, now seen corresponding path program 46 times [2020-10-13 23:41:33,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:33,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486531868] [2020-10-13 23:41:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:33,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:33,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:38,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:38,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:41:38,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:38,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:41:38,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:38,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:38,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:41:38,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:38,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:41:38,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:38,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:38,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:38,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:38,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:38,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:38,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:38,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:38,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-13 23:41:38,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486531868] [2020-10-13 23:41:38,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:38,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:41:38,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510362508] [2020-10-13 23:41:38,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:41:38,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:41:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:41:38,383 INFO L87 Difference]: Start difference. First operand 142 states and 172 transitions. Second operand 23 states. [2020-10-13 23:41:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:38,546 INFO L93 Difference]: Finished difference Result 242 states and 302 transitions. [2020-10-13 23:41:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:41:38,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2020-10-13 23:41:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:38,548 INFO L225 Difference]: With dead ends: 242 [2020-10-13 23:41:38,548 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:41:38,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:41:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:41:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-13 23:41:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 23:41:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 174 transitions. [2020-10-13 23:41:38,556 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 174 transitions. Word has length 137 [2020-10-13 23:41:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:38,556 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 174 transitions. [2020-10-13 23:41:38,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:41:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 174 transitions. [2020-10-13 23:41:38,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 23:41:38,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:38,558 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:38,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:41:38,558 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:38,559 INFO L82 PathProgramCache]: Analyzing trace with hash 547154885, now seen corresponding path program 47 times [2020-10-13 23:41:38,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:38,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605761541] [2020-10-13 23:41:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:38,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:38,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:43,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:43,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 23:41:43,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:43,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:41:43,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:43,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:41:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:41:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:41:43,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:44,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:44,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:44,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:44,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:44,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:44,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:44,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:44,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:44,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:44,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:41:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 23:41:44,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605761541] [2020-10-13 23:41:44,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:44,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:41:44,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873920646] [2020-10-13 23:41:44,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:41:44,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:41:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:41:44,195 INFO L87 Difference]: Start difference. First operand 144 states and 174 transitions. Second operand 32 states. [2020-10-13 23:41:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:44,441 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2020-10-13 23:41:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:41:44,441 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 139 [2020-10-13 23:41:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:44,443 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:41:44,443 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 23:41:44,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:41:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 23:41:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2020-10-13 23:41:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 23:41:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2020-10-13 23:41:44,450 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 139 [2020-10-13 23:41:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:44,451 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2020-10-13 23:41:44,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:41:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2020-10-13 23:41:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 23:41:44,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:44,452 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:44,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 23:41:44,452 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:44,453 INFO L82 PathProgramCache]: Analyzing trace with hash 615728807, now seen corresponding path program 48 times [2020-10-13 23:41:44,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:44,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387472520] [2020-10-13 23:41:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:44,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:45,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:49,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:49,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 23:41:49,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:49,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:41:49,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:49,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:41:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:41:49,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:49,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:49,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:49,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:49,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:49,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:49,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:49,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:49,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:49,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:49,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:49,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:49,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1647 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-13 23:41:49,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387472520] [2020-10-13 23:41:49,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:49,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:41:49,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607790465] [2020-10-13 23:41:49,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:41:49,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:49,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:41:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:41:49,801 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand 24 states. [2020-10-13 23:41:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:49,984 INFO L93 Difference]: Finished difference Result 250 states and 312 transitions. [2020-10-13 23:41:49,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:41:49,985 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 142 [2020-10-13 23:41:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:49,986 INFO L225 Difference]: With dead ends: 250 [2020-10-13 23:41:49,987 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 23:41:49,987 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 [2020-10-13 23:41:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 23:41:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-13 23:41:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 23:41:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 180 transitions. [2020-10-13 23:41:49,994 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 180 transitions. Word has length 142 [2020-10-13 23:41:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:49,994 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 180 transitions. [2020-10-13 23:41:49,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:41:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2020-10-13 23:41:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 23:41:49,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:49,996 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:49,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 23:41:49,996 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash -739209655, now seen corresponding path program 49 times [2020-10-13 23:41:49,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:49,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143690847] [2020-10-13 23:41:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:50,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:51,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:55,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:55,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 23:41:55,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:41:55,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:41:55,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:55,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:41:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:41:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 23:41:55,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:55,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:55,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:55,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:55,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:55,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:55,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:41:55,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:55,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:55,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:55,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 23:41:55,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143690847] [2020-10-13 23:41:55,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:55,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:41:55,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723468860] [2020-10-13 23:41:55,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:41:55,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:41:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:55,589 INFO L87 Difference]: Start difference. First operand 149 states and 180 transitions. Second operand 33 states. [2020-10-13 23:41:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:55,898 INFO L93 Difference]: Finished difference Result 165 states and 199 transitions. [2020-10-13 23:41:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:41:55,898 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 144 [2020-10-13 23:41:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:55,900 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:41:55,900 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:41:55,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:41:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-13 23:41:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 23:41:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 184 transitions. [2020-10-13 23:41:55,906 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 184 transitions. Word has length 144 [2020-10-13 23:41:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:55,906 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 184 transitions. [2020-10-13 23:41:55,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:41:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 184 transitions. [2020-10-13 23:41:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:41:55,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:55,907 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:55,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 23:41:55,908 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1772067421, now seen corresponding path program 50 times [2020-10-13 23:41:55,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:55,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743102948] [2020-10-13 23:41:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:55,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:56,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:00,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:00,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:42:00,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:00,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:42:00,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:00,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:42:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:42:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 23:42:00,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:01,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:01,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:01,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:01,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:01,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:01,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:01,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:01,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 23:42:01,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743102948] [2020-10-13 23:42:01,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:01,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:42:01,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065075584] [2020-10-13 23:42:01,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:42:01,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:01,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:42:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:42:01,570 INFO L87 Difference]: Start difference. First operand 152 states and 184 transitions. Second operand 34 states. [2020-10-13 23:42:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:01,889 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2020-10-13 23:42:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:42:01,890 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 147 [2020-10-13 23:42:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:01,892 INFO L225 Difference]: With dead ends: 168 [2020-10-13 23:42:01,892 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:42:01,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:42:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:42:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2020-10-13 23:42:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 23:42:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 188 transitions. [2020-10-13 23:42:01,898 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 188 transitions. Word has length 147 [2020-10-13 23:42:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:01,898 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 188 transitions. [2020-10-13 23:42:01,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:42:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 188 transitions. [2020-10-13 23:42:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 23:42:01,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:01,899 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:01,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 23:42:01,900 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:01,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1802901513, now seen corresponding path program 51 times [2020-10-13 23:42:01,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:01,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205099705] [2020-10-13 23:42:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:06,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:06,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 23:42:06,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:06,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:42:06,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:06,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:42:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:42:06,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:07,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:07,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:07,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:07,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:07,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:07,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:07,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:07,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:07,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:07,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:07,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-13 23:42:07,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205099705] [2020-10-13 23:42:07,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:07,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:42:07,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909589680] [2020-10-13 23:42:07,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:42:07,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:42:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:42:07,230 INFO L87 Difference]: Start difference. First operand 155 states and 188 transitions. Second operand 25 states. [2020-10-13 23:42:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:07,406 INFO L93 Difference]: Finished difference Result 264 states and 330 transitions. [2020-10-13 23:42:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:42:07,406 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 150 [2020-10-13 23:42:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:07,408 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:42:07,408 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 23:42:07,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:42:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 23:42:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-13 23:42:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 23:42:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 190 transitions. [2020-10-13 23:42:07,415 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 190 transitions. Word has length 150 [2020-10-13 23:42:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:07,415 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 190 transitions. [2020-10-13 23:42:07,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:42:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 190 transitions. [2020-10-13 23:42:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 23:42:07,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:07,417 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:07,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 23:42:07,417 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:07,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1540005291, now seen corresponding path program 52 times [2020-10-13 23:42:07,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:07,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900885696] [2020-10-13 23:42:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:07,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:12,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:12,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 23:42:12,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:12,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:42:12,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:12,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:42:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 23:42:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:42:12,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:13,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:13,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:13,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:13,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:13,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:13,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:13,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:13,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:13,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:13,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:13,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:13,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 23:42:13,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900885696] [2020-10-13 23:42:13,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:13,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:42:13,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860731029] [2020-10-13 23:42:13,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:42:13,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:13,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:42:13,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:42:13,049 INFO L87 Difference]: Start difference. First operand 157 states and 190 transitions. Second operand 35 states. [2020-10-13 23:42:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:13,244 INFO L93 Difference]: Finished difference Result 173 states and 209 transitions. [2020-10-13 23:42:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:42:13,244 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 152 [2020-10-13 23:42:13,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:13,246 INFO L225 Difference]: With dead ends: 173 [2020-10-13 23:42:13,246 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 23:42:13,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:42:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 23:42:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-10-13 23:42:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 23:42:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 194 transitions. [2020-10-13 23:42:13,251 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 194 transitions. Word has length 152 [2020-10-13 23:42:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:13,252 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 194 transitions. [2020-10-13 23:42:13,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:42:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 194 transitions. [2020-10-13 23:42:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 23:42:13,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:13,253 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:13,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 23:42:13,253 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash -817593599, now seen corresponding path program 53 times [2020-10-13 23:42:13,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:13,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729393273] [2020-10-13 23:42:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:13,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:18,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:18,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 23:42:18,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:18,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:42:18,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:18,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:42:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:42:18,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:18,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:18,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:18,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:18,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:18,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:18,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:18,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:18,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 23:42:18,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729393273] [2020-10-13 23:42:18,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:18,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:42:18,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697107302] [2020-10-13 23:42:18,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:42:18,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:18,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:42:18,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:42:18,639 INFO L87 Difference]: Start difference. First operand 160 states and 194 transitions. Second operand 26 states. [2020-10-13 23:42:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:18,805 INFO L93 Difference]: Finished difference Result 272 states and 340 transitions. [2020-10-13 23:42:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:42:18,806 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 155 [2020-10-13 23:42:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:18,807 INFO L225 Difference]: With dead ends: 272 [2020-10-13 23:42:18,808 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 23:42:18,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:42:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 23:42:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-13 23:42:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 23:42:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2020-10-13 23:42:18,813 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 155 [2020-10-13 23:42:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:18,813 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2020-10-13 23:42:18,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:42:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2020-10-13 23:42:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 23:42:18,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:18,814 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:18,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 23:42:18,814 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:18,814 INFO L82 PathProgramCache]: Analyzing trace with hash -60018017, now seen corresponding path program 54 times [2020-10-13 23:42:18,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:18,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712817692] [2020-10-13 23:42:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:19,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:23,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:23,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:42:23,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:23,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 23:42:23,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:23,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:23,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:42:23,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:42:23,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 23:42:23,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:24,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:24,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:24,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:24,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:24,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:24,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:24,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:24,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:24,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:24,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:24,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:24,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 23:42:24,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712817692] [2020-10-13 23:42:24,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:24,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:42:24,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062572046] [2020-10-13 23:42:24,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:42:24,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:24,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:42:24,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:42:24,559 INFO L87 Difference]: Start difference. First operand 162 states and 196 transitions. Second operand 36 states. [2020-10-13 23:42:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:24,896 INFO L93 Difference]: Finished difference Result 178 states and 215 transitions. [2020-10-13 23:42:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:42:24,897 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 157 [2020-10-13 23:42:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:24,899 INFO L225 Difference]: With dead ends: 178 [2020-10-13 23:42:24,899 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 23:42:24,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:42:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 23:42:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2020-10-13 23:42:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 23:42:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 200 transitions. [2020-10-13 23:42:24,905 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 200 transitions. Word has length 157 [2020-10-13 23:42:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:24,906 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 200 transitions. [2020-10-13 23:42:24,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:42:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 200 transitions. [2020-10-13 23:42:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 23:42:24,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:24,907 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:24,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 23:42:24,907 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1564911219, now seen corresponding path program 55 times [2020-10-13 23:42:24,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:24,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357186744] [2020-10-13 23:42:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:24,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:29,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:29,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-13 23:42:29,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:29,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 23:42:29,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:29,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:42:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:42:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 23:42:29,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:30,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:30,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:30,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:30,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:30,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:30,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:30,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:30,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:30,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:30,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:30,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:30,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2146 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 23:42:30,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357186744] [2020-10-13 23:42:30,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:30,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:42:30,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385537320] [2020-10-13 23:42:30,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:42:30,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:42:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:42:30,688 INFO L87 Difference]: Start difference. First operand 165 states and 200 transitions. Second operand 37 states. [2020-10-13 23:42:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:31,032 INFO L93 Difference]: Finished difference Result 181 states and 219 transitions. [2020-10-13 23:42:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:42:31,032 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 160 [2020-10-13 23:42:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:31,034 INFO L225 Difference]: With dead ends: 181 [2020-10-13 23:42:31,035 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 23:42:31,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:42:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 23:42:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2020-10-13 23:42:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 23:42:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions. [2020-10-13 23:42:31,041 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 160 [2020-10-13 23:42:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:31,041 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 204 transitions. [2020-10-13 23:42:31,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:42:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions. [2020-10-13 23:42:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 23:42:31,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:31,043 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:31,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 23:42:31,043 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:31,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:31,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1325310943, now seen corresponding path program 56 times [2020-10-13 23:42:31,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:31,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553844238] [2020-10-13 23:42:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:31,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 23:42:36,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:42:36,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:36,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:42:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:42:36,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:36,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:36,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:36,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:36,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:36,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:36,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:36,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:36,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-13 23:42:36,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553844238] [2020-10-13 23:42:36,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:36,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:42:36,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169880688] [2020-10-13 23:42:36,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:42:36,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:42:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:42:36,475 INFO L87 Difference]: Start difference. First operand 168 states and 204 transitions. Second operand 27 states. [2020-10-13 23:42:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:36,668 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2020-10-13 23:42:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:42:36,669 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 163 [2020-10-13 23:42:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:36,670 INFO L225 Difference]: With dead ends: 286 [2020-10-13 23:42:36,670 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 23:42:36,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:42:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 23:42:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-10-13 23:42:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 23:42:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2020-10-13 23:42:36,676 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 163 [2020-10-13 23:42:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:36,677 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2020-10-13 23:42:36,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:42:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2020-10-13 23:42:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 23:42:36,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:36,678 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:36,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 23:42:36,678 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1354508931, now seen corresponding path program 57 times [2020-10-13 23:42:36,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:36,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248875317] [2020-10-13 23:42:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:36,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:37,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:41,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 23:42:41,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:42:41,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:41,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:42:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:42:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 23:42:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:42,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:42,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:42,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:42,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:42,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:42,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:42,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:42,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2293 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 23:42:42,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248875317] [2020-10-13 23:42:42,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:42,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:42:42,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371826540] [2020-10-13 23:42:42,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:42:42,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:42:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:42:42,429 INFO L87 Difference]: Start difference. First operand 170 states and 206 transitions. Second operand 38 states. [2020-10-13 23:42:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:42,710 INFO L93 Difference]: Finished difference Result 186 states and 225 transitions. [2020-10-13 23:42:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:42:42,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 165 [2020-10-13 23:42:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:42,713 INFO L225 Difference]: With dead ends: 186 [2020-10-13 23:42:42,713 INFO L226 Difference]: Without dead ends: 175 [2020-10-13 23:42:42,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:42:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-13 23:42:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-13 23:42:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 23:42:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 210 transitions. [2020-10-13 23:42:42,718 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 210 transitions. Word has length 165 [2020-10-13 23:42:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:42,719 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 210 transitions. [2020-10-13 23:42:42,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:42:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 210 transitions. [2020-10-13 23:42:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 23:42:42,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:42,720 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:42,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 23:42:42,720 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:42,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1232379409, now seen corresponding path program 58 times [2020-10-13 23:42:42,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:42,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286265078] [2020-10-13 23:42:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:47,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:47,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 23:42:47,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:47,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:42:47,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:47,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:47,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:42:47,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:42:47,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:48,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:48,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:48,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:48,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:48,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:48,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:48,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:48,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-13 23:42:48,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286265078] [2020-10-13 23:42:48,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:48,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:42:48,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209276990] [2020-10-13 23:42:48,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:42:48,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:42:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:42:48,162 INFO L87 Difference]: Start difference. First operand 173 states and 210 transitions. Second operand 28 states. [2020-10-13 23:42:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:48,370 INFO L93 Difference]: Finished difference Result 294 states and 368 transitions. [2020-10-13 23:42:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:42:48,370 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 168 [2020-10-13 23:42:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:48,372 INFO L225 Difference]: With dead ends: 294 [2020-10-13 23:42:48,372 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 23:42:48,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:42:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 23:42:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-13 23:42:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-13 23:42:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2020-10-13 23:42:48,383 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 168 [2020-10-13 23:42:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:48,384 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2020-10-13 23:42:48,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:42:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2020-10-13 23:42:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 23:42:48,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:48,387 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:48,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 23:42:48,387 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:48,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1685750545, now seen corresponding path program 59 times [2020-10-13 23:42:48,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:48,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256785525] [2020-10-13 23:42:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:48,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:53,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:53,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-13 23:42:53,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:53,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 23:42:53,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:53,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:53,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:42:53,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 23:42:53,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-13 23:42:53,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:54,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:54,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:54,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:54,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:54,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:54,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:54,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:54,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:54,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:54,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:54,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 23:42:54,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256785525] [2020-10-13 23:42:54,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:54,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:42:54,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401180649] [2020-10-13 23:42:54,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:42:54,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:54,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:42:54,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:42:54,291 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand 39 states. [2020-10-13 23:42:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:54,589 INFO L93 Difference]: Finished difference Result 191 states and 231 transitions. [2020-10-13 23:42:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:42:54,590 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-10-13 23:42:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:54,591 INFO L225 Difference]: With dead ends: 191 [2020-10-13 23:42:54,592 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 23:42:54,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:42:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 23:42:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-13 23:42:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:42:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 216 transitions. [2020-10-13 23:42:54,598 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 216 transitions. Word has length 170 [2020-10-13 23:42:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:54,598 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 216 transitions. [2020-10-13 23:42:54,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:42:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 216 transitions. [2020-10-13 23:42:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 23:42:54,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:54,600 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:54,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 23:42:54,600 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1132667941, now seen corresponding path program 60 times [2020-10-13 23:42:54,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:54,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764326141] [2020-10-13 23:42:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:54,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking...