/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/eca-rers2012/Problem13_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 03:09:49,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 03:09:49,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 03:09:49,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 03:09:49,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 03:09:49,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 03:09:49,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 03:09:49,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 03:09:49,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 03:09:49,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 03:09:49,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 03:09:49,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 03:09:49,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 03:09:49,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 03:09:49,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 03:09:49,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 03:09:49,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 03:09:49,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 03:09:49,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 03:09:49,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 03:09:49,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 03:09:49,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 03:09:49,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 03:09:49,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 03:09:49,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 03:09:49,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 03:09:49,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 03:09:49,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 03:09:49,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 03:09:49,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 03:09:49,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 03:09:49,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 03:09:49,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 03:09:49,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 03:09:49,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 03:09:49,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 03:09:49,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 03:09:49,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 03:09:49,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 03:09:49,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 03:09:49,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 03:09:49,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 03:09:49,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 03:09:49,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 03:09:49,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 03:09:49,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 03:09:49,812 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 03:09:49,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 03:09:49,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 03:09:49,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 03:09:49,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 03:09:49,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 03:09:49,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 03:09:49,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 03:09:49,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 03:09:49,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 03:09:49,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 03:09:49,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 03:09:49,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 03:09:49,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 03:09:49,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 03:09:49,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 03:09:49,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 03:09:49,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 03:09:49,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 03:09:49,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 03:09:49,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 03:09:49,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 03:09:49,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 03:09:49,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 03:09:49,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 03:09:49,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 03:09:50,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 03:09:50,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 03:09:50,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 03:09:50,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 03:09:50,176 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 03:09:50,177 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label48.c [2020-10-14 03:09:50,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a3ac20d/c263da25b51c4141b5715dedefdf8858/FLAG4334c620c [2020-10-14 03:09:51,028 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 03:09:51,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label48.c [2020-10-14 03:09:51,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a3ac20d/c263da25b51c4141b5715dedefdf8858/FLAG4334c620c [2020-10-14 03:09:51,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a3ac20d/c263da25b51c4141b5715dedefdf8858 [2020-10-14 03:09:51,538 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 03:09:51,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 03:09:51,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 03:09:51,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 03:09:51,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 03:09:51,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:09:51" (1/1) ... [2020-10-14 03:09:51,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac0f60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:51, skipping insertion in model container [2020-10-14 03:09:51,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:09:51" (1/1) ... [2020-10-14 03:09:51,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 03:09:51,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 03:09:53,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 03:09:53,533 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 03:09:54,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 03:09:54,269 INFO L208 MainTranslator]: Completed translation [2020-10-14 03:09:54,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54 WrapperNode [2020-10-14 03:09:54,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 03:09:54,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 03:09:54,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 03:09:54,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 03:09:54,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (1/1) ... [2020-10-14 03:09:54,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (1/1) ... [2020-10-14 03:09:54,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (1/1) ... [2020-10-14 03:09:54,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (1/1) ... [2020-10-14 03:09:54,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (1/1) ... [2020-10-14 03:09:54,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (1/1) ... [2020-10-14 03:09:54,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (1/1) ... [2020-10-14 03:09:54,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 03:09:54,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 03:09:54,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 03:09:54,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 03:09:54,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 03:09:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 03:09:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 03:09:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 03:09:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 03:09:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 03:09:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 03:09:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 03:09:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 03:09:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 03:09:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 03:09:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 03:09:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 03:09:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 03:09:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 03:09:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 03:09:54,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 03:09:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 03:10:05,628 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 03:10:05,629 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 03:10:05,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:10:05 BoogieIcfgContainer [2020-10-14 03:10:05,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 03:10:05,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 03:10:05,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 03:10:05,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 03:10:05,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 03:09:51" (1/3) ... [2020-10-14 03:10:05,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706ba1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:10:05, skipping insertion in model container [2020-10-14 03:10:05,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:09:54" (2/3) ... [2020-10-14 03:10:05,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706ba1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:10:05, skipping insertion in model container [2020-10-14 03:10:05,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:10:05" (3/3) ... [2020-10-14 03:10:05,662 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label48.c [2020-10-14 03:10:05,673 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 03:10:05,686 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 03:10:05,699 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 03:10:05,728 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 03:10:05,728 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 03:10:05,729 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 03:10:05,729 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 03:10:05,729 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 03:10:05,729 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 03:10:05,729 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 03:10:05,729 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 03:10:05,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-14 03:10:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 03:10:05,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:10:05,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:10:05,775 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:10:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:10:05,781 INFO L82 PathProgramCache]: Analyzing trace with hash 646473375, now seen corresponding path program 1 times [2020-10-14 03:10:05,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:10:05,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607844910] [2020-10-14 03:10:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:10:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:10:05,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:06,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:10:06,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 03:10:06,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:10:06,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-14 03:10:06,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:10:06,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:10:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 03:10:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 03:10:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 03:10:06,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 03:10:06,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:10:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:10:06,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:06,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:10:06,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:10:06,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:10:06,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 03:10:06,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:10:06,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:10:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:10:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:10:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 03:10:06,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:10:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:10:06,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607844910] [2020-10-14 03:10:06,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 03:10:06,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 03:10:06,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093242943] [2020-10-14 03:10:06,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 03:10:06,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:10:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 03:10:06,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 03:10:06,369 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-14 03:10:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:10:20,435 INFO L93 Difference]: Finished difference Result 3230 states and 5909 transitions. [2020-10-14 03:10:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:10:20,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 03:10:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:10:20,473 INFO L225 Difference]: With dead ends: 3230 [2020-10-14 03:10:20,474 INFO L226 Difference]: Without dead ends: 2026 [2020-10-14 03:10:20,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:10:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2020-10-14 03:10:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2009. [2020-10-14 03:10:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2009 states. [2020-10-14 03:10:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3291 transitions. [2020-10-14 03:10:20,658 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3291 transitions. Word has length 12 [2020-10-14 03:10:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:10:20,659 INFO L479 AbstractCegarLoop]: Abstraction has 2009 states and 3291 transitions. [2020-10-14 03:10:20,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 03:10:20,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3291 transitions. [2020-10-14 03:10:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 03:10:20,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:10:20,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:10:20,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 03:10:20,665 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:10:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:10:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash -588743909, now seen corresponding path program 1 times [2020-10-14 03:10:20,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:10:20,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493731337] [2020-10-14 03:10:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:10:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:10:20,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:21,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:21,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:10:21,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 03:10:21,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:10:21,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1164 [2020-10-14 03:10:21,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:10:21,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:10:21,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:10:21,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 03:10:21,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 03:10:21,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 03:10:21,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:10:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:10:21,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:21,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:10:22,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:10:22,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:10:22,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 03:10:22,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:10:22,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:10:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:10:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:10:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:10:22,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:10:22,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:10:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:10:22,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:22,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:10:22,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 03:10:22,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:10:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-14 03:10:22,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:10:22,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:10:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:10:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:10:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 03:10:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:10:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:10:22,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493731337] [2020-10-14 03:10:22,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:10:22,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:10:22,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541358510] [2020-10-14 03:10:22,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:10:22,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:10:22,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:10:22,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:10:22,171 INFO L87 Difference]: Start difference. First operand 2009 states and 3291 transitions. Second operand 5 states. [2020-10-14 03:10:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:10:39,070 INFO L93 Difference]: Finished difference Result 5710 states and 9480 transitions. [2020-10-14 03:10:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:10:39,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-14 03:10:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:10:39,096 INFO L225 Difference]: With dead ends: 5710 [2020-10-14 03:10:39,096 INFO L226 Difference]: Without dead ends: 3707 [2020-10-14 03:10:39,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:10:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2020-10-14 03:10:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3673. [2020-10-14 03:10:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3673 states. [2020-10-14 03:10:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 5313 transitions. [2020-10-14 03:10:39,201 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 5313 transitions. Word has length 87 [2020-10-14 03:10:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:10:39,202 INFO L479 AbstractCegarLoop]: Abstraction has 3673 states and 5313 transitions. [2020-10-14 03:10:39,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:10:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 5313 transitions. [2020-10-14 03:10:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 03:10:39,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:10:39,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:10:39,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 03:10:39,207 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:10:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:10:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash 598141175, now seen corresponding path program 1 times [2020-10-14 03:10:39,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:10:39,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859508008] [2020-10-14 03:10:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:10:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:10:39,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:39,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:39,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:39,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:40,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:10:40,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 03:10:40,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 03:10:40,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-14 03:10:40,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:10:40,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:10:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:10:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-14 03:10:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 03:10:40,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:10:40,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:10:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:10:40,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:40,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:10:40,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:10:40,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:10:40,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 03:10:40,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:10:40,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:10:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:10:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:10:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:10:40,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:10:40,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:10:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:10:40,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:10:40,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:10:40,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 03:10:40,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:10:40,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-14 03:10:40,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:10:40,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:10:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:10:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 03:10:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 03:10:40,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:10:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:10:40,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859508008] [2020-10-14 03:10:40,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 03:10:40,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 03:10:40,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734216677] [2020-10-14 03:10:40,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:10:40,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:10:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:10:40,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:10:40,697 INFO L87 Difference]: Start difference. First operand 3673 states and 5313 transitions. Second operand 5 states. [2020-10-14 03:10:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:10:59,984 INFO L93 Difference]: Finished difference Result 10742 states and 15800 transitions. [2020-10-14 03:10:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:10:59,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-10-14 03:10:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:11:00,018 INFO L225 Difference]: With dead ends: 10742 [2020-10-14 03:11:00,018 INFO L226 Difference]: Without dead ends: 7075 [2020-10-14 03:11:00,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:11:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2020-10-14 03:11:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 7000. [2020-10-14 03:11:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7000 states. [2020-10-14 03:11:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7000 states to 7000 states and 9886 transitions. [2020-10-14 03:11:00,223 INFO L78 Accepts]: Start accepts. Automaton has 7000 states and 9886 transitions. Word has length 94 [2020-10-14 03:11:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:11:00,228 INFO L479 AbstractCegarLoop]: Abstraction has 7000 states and 9886 transitions. [2020-10-14 03:11:00,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:11:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 7000 states and 9886 transitions. [2020-10-14 03:11:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-14 03:11:00,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:11:00,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:11:00,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 03:11:00,240 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:11:00,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:11:00,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1563121319, now seen corresponding path program 1 times [2020-10-14 03:11:00,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:11:00,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326088064] [2020-10-14 03:11:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:11:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:00,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:00,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:01,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 03:11:01,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:11:01,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-14 03:11:01,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:01,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:11:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-14 03:11:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 03:11:01,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:11:01,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:11:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:01,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:01,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:01,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:11:01,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:11:01,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 03:11:01,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:01,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:01,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:11:01,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:11:01,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:11:01,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:11:01,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:11:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:01,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:01,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:01,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 03:11:01,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:11:01,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-14 03:11:01,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:01,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:11:01,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:11:01,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 03:11:01,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:11:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:11:01,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326088064] [2020-10-14 03:11:01,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:11:01,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:11:01,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015230025] [2020-10-14 03:11:01,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:11:01,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:11:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:11:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:11:01,314 INFO L87 Difference]: Start difference. First operand 7000 states and 9886 transitions. Second operand 5 states. [2020-10-14 03:11:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:11:23,551 INFO L93 Difference]: Finished difference Result 17354 states and 25046 transitions. [2020-10-14 03:11:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:11:23,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2020-10-14 03:11:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:11:23,596 INFO L225 Difference]: With dead ends: 17354 [2020-10-14 03:11:23,596 INFO L226 Difference]: Without dead ends: 10360 [2020-10-14 03:11:23,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:11:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2020-10-14 03:11:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10286. [2020-10-14 03:11:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10286 states. [2020-10-14 03:11:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10286 states to 10286 states and 14203 transitions. [2020-10-14 03:11:23,832 INFO L78 Accepts]: Start accepts. Automaton has 10286 states and 14203 transitions. Word has length 113 [2020-10-14 03:11:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:11:23,834 INFO L479 AbstractCegarLoop]: Abstraction has 10286 states and 14203 transitions. [2020-10-14 03:11:23,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:11:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 10286 states and 14203 transitions. [2020-10-14 03:11:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 03:11:23,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:11:23,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:11:23,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 03:11:23,842 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:11:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:11:23,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1956040156, now seen corresponding path program 1 times [2020-10-14 03:11:23,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:11:23,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762632637] [2020-10-14 03:11:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:11:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:23,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:24,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:24,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:24,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 03:11:24,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 03:11:24,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 871 [2020-10-14 03:11:24,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:24,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:24,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:11:24,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-14 03:11:24,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 03:11:24,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:11:24,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:11:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:24,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:24,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:24,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:11:24,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:11:24,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 03:11:24,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:24,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:11:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:11:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:11:24,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 03:11:24,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:11:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:24,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:24,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:24,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 03:11:24,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:11:24,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-14 03:11:24,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:24,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:24,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:11:24,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:11:24,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-14 03:11:24,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 03:11:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:11:25,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762632637] [2020-10-14 03:11:25,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:11:25,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:11:25,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800186330] [2020-10-14 03:11:25,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:11:25,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:11:25,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:11:25,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:11:25,048 INFO L87 Difference]: Start difference. First operand 10286 states and 14203 transitions. Second operand 5 states. [2020-10-14 03:11:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:11:45,328 INFO L93 Difference]: Finished difference Result 30337 states and 43113 transitions. [2020-10-14 03:11:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:11:45,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-10-14 03:11:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:11:45,417 INFO L225 Difference]: With dead ends: 30337 [2020-10-14 03:11:45,417 INFO L226 Difference]: Without dead ends: 20057 [2020-10-14 03:11:45,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:11:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20057 states. [2020-10-14 03:11:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20057 to 20050. [2020-10-14 03:11:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20050 states. [2020-10-14 03:11:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20050 states to 20050 states and 26796 transitions. [2020-10-14 03:11:45,917 INFO L78 Accepts]: Start accepts. Automaton has 20050 states and 26796 transitions. Word has length 130 [2020-10-14 03:11:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:11:45,918 INFO L479 AbstractCegarLoop]: Abstraction has 20050 states and 26796 transitions. [2020-10-14 03:11:45,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:11:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20050 states and 26796 transitions. [2020-10-14 03:11:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 03:11:45,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:11:45,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:11:45,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 03:11:45,922 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:11:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:11:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1835622116, now seen corresponding path program 1 times [2020-10-14 03:11:45,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:11:45,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150890291] [2020-10-14 03:11:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:11:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:45,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:46,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:46,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:46,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 03:11:46,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:11:46,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-14 03:11:46,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:46,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:11:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-14 03:11:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 03:11:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 03:11:46,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:11:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:46,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:46,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:46,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:11:46,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:11:46,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 03:11:46,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:46,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:11:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:11:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:11:46,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:11:46,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:11:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:11:46,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:11:46,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:11:46,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 03:11:46,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:11:46,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-14 03:11:46,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:11:46,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:11:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:11:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:11:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 03:11:46,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:11:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:11:47,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150890291] [2020-10-14 03:11:47,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:11:47,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:11:47,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118261415] [2020-10-14 03:11:47,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:11:47,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:11:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:11:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:11:47,153 INFO L87 Difference]: Start difference. First operand 20050 states and 26796 transitions. Second operand 5 states. [2020-10-14 03:12:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:12:06,753 INFO L93 Difference]: Finished difference Result 49896 states and 69674 transitions. [2020-10-14 03:12:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:12:06,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-10-14 03:12:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:12:06,848 INFO L225 Difference]: With dead ends: 49896 [2020-10-14 03:12:06,849 INFO L226 Difference]: Without dead ends: 29852 [2020-10-14 03:12:06,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:12:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29852 states. [2020-10-14 03:12:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29852 to 29817. [2020-10-14 03:12:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29817 states. [2020-10-14 03:12:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29817 states to 29817 states and 39021 transitions. [2020-10-14 03:12:07,598 INFO L78 Accepts]: Start accepts. Automaton has 29817 states and 39021 transitions. Word has length 131 [2020-10-14 03:12:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:12:07,599 INFO L479 AbstractCegarLoop]: Abstraction has 29817 states and 39021 transitions. [2020-10-14 03:12:07,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:12:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 29817 states and 39021 transitions. [2020-10-14 03:12:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-14 03:12:07,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:12:07,604 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:12:07,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 03:12:07,605 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:12:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:12:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash 943920908, now seen corresponding path program 1 times [2020-10-14 03:12:07,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:12:07,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417768357] [2020-10-14 03:12:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:12:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:09,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:10,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:10,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-14 03:12:10,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:12:10,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2435 [2020-10-14 03:12:10,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:10,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:12:10,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-10-14 03:12:10,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 03:12:10,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:10,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:12:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:10,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:10,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:10,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:12:10,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:10,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 03:12:10,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:10,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:12:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:12:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:12:10,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:10,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:12:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:10,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:10,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:10,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-14 03:12:10,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:10,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 03:12:10,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:10,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:12:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:12:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-14 03:12:10,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:12:10,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417768357] [2020-10-14 03:12:10,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:12:10,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:12:10,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46625538] [2020-10-14 03:12:10,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:12:10,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:12:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:12:10,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:12:10,581 INFO L87 Difference]: Start difference. First operand 29817 states and 39021 transitions. Second operand 5 states. [2020-10-14 03:12:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:12:36,849 INFO L93 Difference]: Finished difference Result 69400 states and 94802 transitions. [2020-10-14 03:12:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:12:36,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 205 [2020-10-14 03:12:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:12:37,004 INFO L225 Difference]: With dead ends: 69400 [2020-10-14 03:12:37,004 INFO L226 Difference]: Without dead ends: 39589 [2020-10-14 03:12:37,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:12:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39589 states. [2020-10-14 03:12:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39589 to 39567. [2020-10-14 03:12:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39567 states. [2020-10-14 03:12:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39567 states to 39567 states and 52367 transitions. [2020-10-14 03:12:37,893 INFO L78 Accepts]: Start accepts. Automaton has 39567 states and 52367 transitions. Word has length 205 [2020-10-14 03:12:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:12:37,894 INFO L479 AbstractCegarLoop]: Abstraction has 39567 states and 52367 transitions. [2020-10-14 03:12:37,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:12:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39567 states and 52367 transitions. [2020-10-14 03:12:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-14 03:12:37,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:12:37,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:12:37,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 03:12:37,905 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:12:37,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:12:37,906 INFO L82 PathProgramCache]: Analyzing trace with hash 151408622, now seen corresponding path program 1 times [2020-10-14 03:12:37,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:12:37,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321176337] [2020-10-14 03:12:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:12:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:38,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:38,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:38,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:39,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:40,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:40,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-14 03:12:40,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 03:12:40,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2190 [2020-10-14 03:12:40,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:40,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:12:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-14 03:12:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 03:12:40,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:40,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:12:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:40,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:40,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:40,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:12:40,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:40,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 03:12:40,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:40,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:12:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:12:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:12:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:40,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:12:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:40,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:40,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:40,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 03:12:40,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:40,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-14 03:12:40,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:40,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:40,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:12:40,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:12:40,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 03:12:40,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:40,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-14 03:12:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:40,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:40,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:40,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 03:12:40,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:40,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-14 03:12:40,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:40,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:40,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:12:40,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 03:12:40,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 03:12:40,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 03:12:40,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321176337] [2020-10-14 03:12:40,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:12:40,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 03:12:40,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540897281] [2020-10-14 03:12:40,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 03:12:40,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:12:40,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 03:12:40,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 03:12:40,848 INFO L87 Difference]: Start difference. First operand 39567 states and 52367 transitions. Second operand 7 states. [2020-10-14 03:13:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:13:28,949 INFO L93 Difference]: Finished difference Result 148675 states and 217195 transitions. [2020-10-14 03:13:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 03:13:28,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-10-14 03:13:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:13:29,418 INFO L225 Difference]: With dead ends: 148675 [2020-10-14 03:13:29,418 INFO L226 Difference]: Without dead ends: 109114 [2020-10-14 03:13:29,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 03:13:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109114 states. [2020-10-14 03:13:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109114 to 107914. [2020-10-14 03:13:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107914 states. [2020-10-14 03:13:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107914 states to 107914 states and 143402 transitions. [2020-10-14 03:13:33,446 INFO L78 Accepts]: Start accepts. Automaton has 107914 states and 143402 transitions. Word has length 234 [2020-10-14 03:13:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:13:33,446 INFO L479 AbstractCegarLoop]: Abstraction has 107914 states and 143402 transitions. [2020-10-14 03:13:33,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 03:13:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 107914 states and 143402 transitions. [2020-10-14 03:13:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-14 03:13:33,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:13:33,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 03:13:33,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 03:13:33,459 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:13:33,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:13:33,460 INFO L82 PathProgramCache]: Analyzing trace with hash 68107426, now seen corresponding path program 1 times [2020-10-14 03:13:33,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:13:33,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357419229] [2020-10-14 03:13:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:13:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:33,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:34,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:34,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:36,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:36,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:36,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-14 03:13:36,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 03:13:36,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3025 [2020-10-14 03:13:36,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:36,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:13:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 03:13:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-14 03:13:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 03:13:36,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:13:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:36,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:36,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:36,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:13:36,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:13:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 03:13:36,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:36,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:36,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:13:36,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:13:36,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 03:13:36,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 03:13:36,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:13:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:36,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:36,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:36,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 03:13:36,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:13:36,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-14 03:13:36,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:36,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:36,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:13:36,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:13:36,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 03:13:36,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:36,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-14 03:13:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:36,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:37,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:37,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 03:13:37,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:13:37,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-14 03:13:37,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:37,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:37,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:13:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-14 03:13:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 03:13:37,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-14 03:13:37,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357419229] [2020-10-14 03:13:37,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 03:13:37,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 03:13:37,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267632503] [2020-10-14 03:13:37,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 03:13:37,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:13:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 03:13:37,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:13:37,320 INFO L87 Difference]: Start difference. First operand 107914 states and 143402 transitions. Second operand 6 states.