/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condm.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:50:32,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:50:32,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:50:32,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:50:32,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:50:32,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:50:32,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:50:32,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:50:32,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:50:32,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:50:32,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:50:32,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:50:32,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:50:32,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:50:32,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:50:32,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:50:32,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:50:32,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:50:32,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:50:32,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:50:32,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:50:32,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:50:32,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:50:32,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:50:32,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:50:32,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:50:32,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:50:32,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:50:32,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:50:32,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:50:32,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:50:32,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:50:32,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:50:32,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:50:32,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:50:32,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:50:32,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:50:32,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:50:32,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:50:32,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:50:32,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:50:32,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:50:32,786 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:50:32,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:50:32,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:50:32,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:50:32,788 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:50:32,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:50:32,788 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:50:32,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:50:32,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:50:32,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:50:32,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:50:32,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:50:32,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:50:32,789 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:50:32,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:50:32,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:50:32,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:50:32,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:50:32,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:50:32,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:50:32,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:50:32,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:50:32,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:50:32,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:50:32,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:50:32,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:50:32,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:50:32,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:50:32,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:50:32,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:50:33,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:50:33,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:50:33,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:50:33,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:50:33,123 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:50:33,124 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condm.c [2020-10-13 23:50:33,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/025de66c0/793aa15abd584dcb83d01247a5275566/FLAG0054232a5 [2020-10-13 23:50:33,572 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:50:33,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condm.c [2020-10-13 23:50:33,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/025de66c0/793aa15abd584dcb83d01247a5275566/FLAG0054232a5 [2020-10-13 23:50:33,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/025de66c0/793aa15abd584dcb83d01247a5275566 [2020-10-13 23:50:33,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:50:33,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:50:33,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:50:33,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:50:33,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:50:33,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:50:33" (1/1) ... [2020-10-13 23:50:33,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592fd428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:33, skipping insertion in model container [2020-10-13 23:50:33,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:50:33" (1/1) ... [2020-10-13 23:50:33,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:50:33,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:50:34,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:50:34,191 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:50:34,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:50:34,225 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:50:34,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34 WrapperNode [2020-10-13 23:50:34,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:50:34,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:50:34,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:50:34,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:50:34,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (1/1) ... [2020-10-13 23:50:34,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (1/1) ... [2020-10-13 23:50:34,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (1/1) ... [2020-10-13 23:50:34,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (1/1) ... [2020-10-13 23:50:34,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (1/1) ... [2020-10-13 23:50:34,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (1/1) ... [2020-10-13 23:50:34,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (1/1) ... [2020-10-13 23:50:34,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:50:34,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:50:34,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:50:34,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:50:34,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:50:34,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:50:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:50:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:50:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:50:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:50:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:50:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:50:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:50:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:50:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:50:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:50:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:50:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:50:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:50:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:50:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:50:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:50:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:50:34,705 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:50:34,705 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:50:34,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:50:34 BoogieIcfgContainer [2020-10-13 23:50:34,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:50:34,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:50:34,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:50:34,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:50:34,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:50:33" (1/3) ... [2020-10-13 23:50:34,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc87c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:50:34, skipping insertion in model container [2020-10-13 23:50:34,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:34" (2/3) ... [2020-10-13 23:50:34,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc87c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:50:34, skipping insertion in model container [2020-10-13 23:50:34,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:50:34" (3/3) ... [2020-10-13 23:50:34,718 INFO L109 eAbstractionObserver]: Analyzing ICFG condm.c [2020-10-13 23:50:34,729 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:50:34,736 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:50:34,752 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:50:34,777 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:50:34,778 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:50:34,778 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:50:34,778 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:50:34,778 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:50:34,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:50:34,779 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:50:34,779 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:50:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 23:50:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:50:34,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:34,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:34,810 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1524373234, now seen corresponding path program 1 times [2020-10-13 23:50:34,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:34,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787340460] [2020-10-13 23:50:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:34,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:35,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:50:35,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:50:35,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-10-13 23:50:35,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:35,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:35,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:50:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:35,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:50:35,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:35,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:35,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:35,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:35,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:50:35,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:35,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:35,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:35,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:35,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:35,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:35,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:35,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:35,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:50:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:35,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:35,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787340460] [2020-10-13 23:50:35,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:50:35,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:50:35,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177657533] [2020-10-13 23:50:35,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:50:35,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:35,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:50:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:50:35,928 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 23:50:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:36,090 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-13 23:50:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:50:36,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-13 23:50:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:36,107 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:50:36,107 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:50:36,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:50:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:50:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 23:50:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 23:50:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-13 23:50:36,155 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-10-13 23:50:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:36,155 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-13 23:50:36,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:50:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-13 23:50:36,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:50:36,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:36,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:36,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:50:36,158 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:36,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2111179248, now seen corresponding path program 1 times [2020-10-13 23:50:36,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:36,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058531501] [2020-10-13 23:50:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:36,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:36,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:50:36,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:50:36,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-13 23:50:36,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:36,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:50:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:50:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:50:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:36,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:36,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:36,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:36,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:36,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:36,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:36,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:36,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:36,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:36,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:36,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:36,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:36,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:50:36,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:36,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:50:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:50:36,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:36,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058531501] [2020-10-13 23:50:36,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:50:36,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:50:36,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529890434] [2020-10-13 23:50:36,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:50:36,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:50:36,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:50:36,576 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-10-13 23:50:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:36,694 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-13 23:50:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:50:36,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 23:50:36,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:36,696 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:50:36,696 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 23:50:36,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:50:36,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 23:50:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 23:50:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:50:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 23:50:36,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-10-13 23:50:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:36,706 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 23:50:36,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:50:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 23:50:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:50:36,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:36,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:36,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:50:36,708 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash 373909448, now seen corresponding path program 1 times [2020-10-13 23:50:36,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:36,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566174444] [2020-10-13 23:50:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:36,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:37,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:38,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:39,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:50:39,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:50:39,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2747 [2020-10-13 23:50:39,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:39,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:50:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:50:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:50:39,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:39,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:39,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:39,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:39,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:39,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:50:39,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:39,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:39,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:39,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:39,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:39,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:39,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:50:39,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:39,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:39,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:50:39,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:39,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:50:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:50:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:50:39,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566174444] [2020-10-13 23:50:39,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:39,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:50:39,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106393662] [2020-10-13 23:50:39,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:50:39,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:39,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:50:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:50:39,683 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2020-10-13 23:50:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:39,943 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-13 23:50:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:50:39,944 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 23:50:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:39,949 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:50:39,949 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:50:39,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:50:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:50:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-10-13 23:50:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:50:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-13 23:50:39,975 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-10-13 23:50:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:39,975 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-13 23:50:39,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:50:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-13 23:50:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:50:39,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:39,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:39,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:50:39,980 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:39,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1053967818, now seen corresponding path program 1 times [2020-10-13 23:50:39,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:39,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355580895] [2020-10-13 23:50:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:40,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:40,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:40,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:40,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:40,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:50:40,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:50:40,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-13 23:50:40,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:40,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:50:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:40,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:50:40,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:40,854 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 21 [2020-10-13 23:50:41,056 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-10-13 23:50:41,283 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 16 [2020-10-13 23:50:41,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:41,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:41,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:41,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:41,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:41,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:41,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:41,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:41,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:41,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:41,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:41,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:41,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:41,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:41,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:41,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:41,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:41,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:41,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:41,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:41,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:41,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355580895] [2020-10-13 23:50:41,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:41,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:50:41,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334628079] [2020-10-13 23:50:41,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:50:41,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:50:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:50:41,359 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-10-13 23:50:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:41,866 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-13 23:50:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:50:41,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-13 23:50:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:41,869 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:50:41,869 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:50:41,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:50:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:50:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2020-10-13 23:50:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 23:50:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-13 23:50:41,881 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 27 [2020-10-13 23:50:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:41,881 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-13 23:50:41,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:50:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-13 23:50:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:50:41,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:41,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:41,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:50:41,884 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:41,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1478774514, now seen corresponding path program 2 times [2020-10-13 23:50:41,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:41,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729763995] [2020-10-13 23:50:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:41,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:43,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:50:43,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:50:43,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-13 23:50:43,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:43,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:50:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:50:43,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:50:43,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:43,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:43,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:43,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:43,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:43,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:43,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:43,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:43,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:50:43,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:43,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:43,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:43,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:43,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:50:43,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:43,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:43,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:50:43,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:43,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:50:43,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:50:43,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729763995] [2020-10-13 23:50:43,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:43,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:50:43,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266070660] [2020-10-13 23:50:43,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:50:43,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:43,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:50:43,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:50:43,555 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 7 states. [2020-10-13 23:50:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:43,896 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-13 23:50:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:50:43,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 23:50:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:43,904 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:50:43,904 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:50:43,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:50:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:50:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2020-10-13 23:50:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:50:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-13 23:50:43,936 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 30 [2020-10-13 23:50:43,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:43,936 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-13 23:50:43,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:50:43,937 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-13 23:50:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:50:43,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:43,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:43,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:50:43,940 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:43,940 INFO L82 PathProgramCache]: Analyzing trace with hash -540550706, now seen corresponding path program 2 times [2020-10-13 23:50:43,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:43,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446935508] [2020-10-13 23:50:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:43,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:44,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:44,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:46,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:50:46,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:50:46,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2219 [2020-10-13 23:50:46,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:46,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:50:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:50:46,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:46,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:46,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:46,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:46,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:46,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:46,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:46,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:46,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:46,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:46,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:46,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:46,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:46,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:46,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:46,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:46,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:46,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:46,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:46,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446935508] [2020-10-13 23:50:46,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:46,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:50:46,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355604572] [2020-10-13 23:50:46,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:50:46,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:50:46,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:50:46,254 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 8 states. [2020-10-13 23:50:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:46,544 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-13 23:50:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:50:46,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 23:50:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:46,546 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:50:46,547 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:50:46,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:50:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:50:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-13 23:50:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:50:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 23:50:46,565 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2020-10-13 23:50:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:46,567 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 23:50:46,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:50:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 23:50:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:50:46,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:46,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:46,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:50:46,572 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:46,574 INFO L82 PathProgramCache]: Analyzing trace with hash -800892852, now seen corresponding path program 3 times [2020-10-13 23:50:46,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:46,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740730627] [2020-10-13 23:50:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:47,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:47,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:50:47,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:47,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-13 23:50:47,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:47,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:47,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:50:47,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:50:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:48,875 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 504 DAG size of output: 26 [2020-10-13 23:50:48,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:48,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:48,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:48,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:48,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:48,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:48,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:48,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:48,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:48,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:48,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:48,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:48,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:48,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:48,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:48,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:50:48,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740730627] [2020-10-13 23:50:48,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:48,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:50:48,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821308007] [2020-10-13 23:50:48,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:50:48,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:50:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:50:48,949 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 11 states. [2020-10-13 23:50:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:49,525 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-13 23:50:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:50:49,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-13 23:50:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:49,529 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:50:49,529 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:50:49,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:50:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:50:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-13 23:50:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:50:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-13 23:50:49,550 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 32 [2020-10-13 23:50:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:49,551 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-13 23:50:49,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:50:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-13 23:50:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:50:49,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:49,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:49,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:50:49,554 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:49,554 INFO L82 PathProgramCache]: Analyzing trace with hash 137330956, now seen corresponding path program 3 times [2020-10-13 23:50:49,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:49,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727006517] [2020-10-13 23:50:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:49,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:49,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:49,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:49,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:51,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:52,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:50:52,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:50:52,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3004 [2020-10-13 23:50:52,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:52,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:50:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:52,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:50:52,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:52,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:52,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:52,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:52,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:52,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:52,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:52,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:52,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:52,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:52,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:52,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:52,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:52,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:52,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:52,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:52,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:52,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:52,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:52,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:52,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:53,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727006517] [2020-10-13 23:50:53,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:53,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:50:53,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077536684] [2020-10-13 23:50:53,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:50:53,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:50:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:50:53,007 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 10 states. [2020-10-13 23:50:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:53,554 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-10-13 23:50:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:50:53,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-13 23:50:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:53,557 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:50:53,557 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:50:53,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:50:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:50:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-13 23:50:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:50:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-13 23:50:53,581 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 32 [2020-10-13 23:50:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:53,582 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-13 23:50:53,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:50:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-13 23:50:53,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:50:53,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:53,586 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:53,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:50:53,587 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:53,587 INFO L82 PathProgramCache]: Analyzing trace with hash -325598710, now seen corresponding path program 4 times [2020-10-13 23:50:53,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:53,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729422578] [2020-10-13 23:50:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:53,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:54,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:55,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:55,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:55,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:50:55,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:50:55,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1998 [2020-10-13 23:50:55,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:55,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:55,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:50:55,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:55,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:50:55,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:55,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:55,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:55,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:55,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:55,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:55,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:55,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:55,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:55,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:55,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:55,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:55,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:55,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:55,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:55,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:55,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:55,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:55,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:55,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:55,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:55,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:55,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729422578] [2020-10-13 23:50:55,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:55,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:50:55,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659698027] [2020-10-13 23:50:55,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:50:55,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:50:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:50:55,703 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-10-13 23:50:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:56,097 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2020-10-13 23:50:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:50:56,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 23:50:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:56,099 INFO L225 Difference]: With dead ends: 118 [2020-10-13 23:50:56,100 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 23:50:56,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:50:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 23:50:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-10-13 23:50:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:50:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-13 23:50:56,126 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 35 [2020-10-13 23:50:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:56,128 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-13 23:50:56,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:50:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-13 23:50:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:50:56,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:56,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:56,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:50:56,132 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:56,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1336734092, now seen corresponding path program 5 times [2020-10-13 23:50:56,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:56,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408171371] [2020-10-13 23:50:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:56,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:00,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:00,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:51:00,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:51:00,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4368 [2020-10-13 23:51:00,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:00,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:51:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:51:00,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:00,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:00,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:00,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:00,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:00,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:00,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:00,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:00,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:00,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:00,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:00,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:00,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:00,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:00,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:00,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:00,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:00,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:00,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:00,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:00,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:51:00,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408171371] [2020-10-13 23:51:00,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:00,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:51:00,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503294827] [2020-10-13 23:51:00,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:51:00,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:51:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:51:00,740 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 9 states. [2020-10-13 23:51:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:01,508 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2020-10-13 23:51:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:51:01,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 23:51:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:01,509 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:51:01,510 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:51:01,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:51:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:51:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-10-13 23:51:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:51:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-10-13 23:51:01,528 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 37 [2020-10-13 23:51:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:01,528 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-10-13 23:51:01,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:51:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-10-13 23:51:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:51:01,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:01,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:01,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:51:01,532 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash 995094222, now seen corresponding path program 4 times [2020-10-13 23:51:01,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:01,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302165199] [2020-10-13 23:51:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:01,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:01,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:03,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:03,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:51:03,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:51:03,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2405 [2020-10-13 23:51:03,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:03,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:51:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:51:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:04,751 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2020-10-13 23:51:05,360 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 26 [2020-10-13 23:51:05,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:05,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:05,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:05,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:05,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:05,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:05,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:05,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:05,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:05,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:05,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:05,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:05,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:05,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:05,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:05,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:05,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:05,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:05,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:05,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:05,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:05,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:51:05,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302165199] [2020-10-13 23:51:05,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:05,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:51:05,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619801452] [2020-10-13 23:51:05,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:51:05,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:05,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:51:05,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:51:05,456 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 18 states. [2020-10-13 23:51:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:06,614 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2020-10-13 23:51:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:51:06,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-13 23:51:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:06,616 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:51:06,616 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:51:06,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:51:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:51:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-13 23:51:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:51:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-10-13 23:51:06,648 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 37 [2020-10-13 23:51:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:06,648 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-10-13 23:51:06,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:51:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-10-13 23:51:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:51:06,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:06,649 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:06,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:51:06,650 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1468226466, now seen corresponding path program 1 times [2020-10-13 23:51:06,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:06,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604976542] [2020-10-13 23:51:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:06,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:06,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:07,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:51:07,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:51:07,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-13 23:51:07,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:07,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:07,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:51:07,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:07,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:51:07,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:07,674 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 17 [2020-10-13 23:51:07,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:07,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:07,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:07,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:07,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:07,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:07,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:07,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:07,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:07,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:07,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:07,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:07,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:07,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:07,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:07,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:07,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:07,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:07,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:51:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:07,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:07,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:07,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:07,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:51:07,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:07,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:51:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:51:07,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:07,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604976542] [2020-10-13 23:51:07,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:07,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:51:07,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118568275] [2020-10-13 23:51:07,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:51:07,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:07,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:51:07,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:51:07,771 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 13 states. [2020-10-13 23:51:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:08,862 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-10-13 23:51:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:51:08,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-13 23:51:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:08,865 INFO L225 Difference]: With dead ends: 120 [2020-10-13 23:51:08,865 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:51:08,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:51:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:51:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-13 23:51:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:51:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-10-13 23:51:08,878 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 40 [2020-10-13 23:51:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:08,879 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-10-13 23:51:08,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:51:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-10-13 23:51:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:51:08,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:08,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:08,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:51:08,880 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1110722702, now seen corresponding path program 6 times [2020-10-13 23:51:08,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:08,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948904814] [2020-10-13 23:51:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:08,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:10,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:11,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:11,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:51:11,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:51:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2967 [2020-10-13 23:51:11,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:11,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:51:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:51:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:51:11,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:12,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:12,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:12,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:12,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:12,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:12,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:12,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:12,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:12,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:12,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:12,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:12,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:12,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:12,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:12,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:12,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:12,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:12,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:12,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:12,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:12,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:12,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:12,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:51:12,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948904814] [2020-10-13 23:51:12,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:12,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:51:12,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184239305] [2020-10-13 23:51:12,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:51:12,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:12,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:51:12,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:51:12,024 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 9 states. [2020-10-13 23:51:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:12,343 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2020-10-13 23:51:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:51:12,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-13 23:51:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:12,345 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:51:12,346 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:51:12,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:51:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:51:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-13 23:51:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:51:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-13 23:51:12,357 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 39 [2020-10-13 23:51:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:12,358 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-13 23:51:12,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:51:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-13 23:51:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:51:12,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:12,359 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:12,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:51:12,359 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:12,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1641992840, now seen corresponding path program 7 times [2020-10-13 23:51:12,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:12,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880609514] [2020-10-13 23:51:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:12,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:13,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:13,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:51:13,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:51:13,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-13 23:51:13,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:13,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:51:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:13,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:51:13,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:13,758 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 19 [2020-10-13 23:51:14,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:14,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:14,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:14,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:14,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:14,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:14,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:14,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:14,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:14,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:14,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:14,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:14,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:14,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:14,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:14,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:14,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:14,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:14,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:14,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:14,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:14,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:14,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:51:14,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880609514] [2020-10-13 23:51:14,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:14,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:51:14,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977558636] [2020-10-13 23:51:14,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:51:14,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:14,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:51:14,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:51:14,310 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 13 states. [2020-10-13 23:51:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:14,987 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-13 23:51:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:51:14,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-13 23:51:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:14,989 INFO L225 Difference]: With dead ends: 87 [2020-10-13 23:51:14,989 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:51:14,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:51:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:51:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 71. [2020-10-13 23:51:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:51:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-13 23:51:15,001 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 42 [2020-10-13 23:51:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:15,001 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-13 23:51:15,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:51:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-13 23:51:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:51:15,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:15,002 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:15,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:51:15,003 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1653641906, now seen corresponding path program 5 times [2020-10-13 23:51:15,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:15,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983337999] [2020-10-13 23:51:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:15,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:20,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:51:20,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:51:20,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:51:20,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:20,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:51:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:51:20,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:20,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:20,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:20,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:20,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:20,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:20,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:20,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:20,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:20,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:20,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:20,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:20,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:20,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:20,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:20,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:20,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:20,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:20,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:20,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983337999] [2020-10-13 23:51:20,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:20,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:51:20,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880950686] [2020-10-13 23:51:20,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:51:20,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:51:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:51:20,124 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 13 states. [2020-10-13 23:51:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:20,575 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2020-10-13 23:51:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:51:20,576 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-13 23:51:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:20,578 INFO L225 Difference]: With dead ends: 146 [2020-10-13 23:51:20,578 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 23:51:20,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:51:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 23:51:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2020-10-13 23:51:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:51:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-10-13 23:51:20,597 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 43 [2020-10-13 23:51:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:20,597 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-10-13 23:51:20,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:51:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-10-13 23:51:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:51:20,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:20,598 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:20,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:51:20,599 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1515868196, now seen corresponding path program 1 times [2020-10-13 23:51:20,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:20,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564464878] [2020-10-13 23:51:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:20,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:22,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:22,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:24,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:24,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:51:24,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:51:24,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3997 [2020-10-13 23:51:24,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:24,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:24,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:51:24,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:24,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:51:24,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:25,381 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 28 [2020-10-13 23:51:26,257 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 18 [2020-10-13 23:51:26,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:26,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:26,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:26,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:26,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:26,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:26,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:26,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:26,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:26,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:26,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:26,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:26,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:26,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:26,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:26,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:26,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:26,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:26,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:26,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:26,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:26,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:26,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 23:51:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:26,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:26,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:26,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:26,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:51:26,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:26,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:51:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:51:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:26,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564464878] [2020-10-13 23:51:26,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:26,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:51:26,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339597043] [2020-10-13 23:51:26,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:51:26,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:51:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:51:26,387 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 22 states. [2020-10-13 23:51:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:29,112 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2020-10-13 23:51:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:51:29,113 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-13 23:51:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:29,114 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:51:29,114 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 23:51:29,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=333, Invalid=1923, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:51:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 23:51:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2020-10-13 23:51:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:51:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-10-13 23:51:29,135 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 45 [2020-10-13 23:51:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:29,135 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-10-13 23:51:29,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:51:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-10-13 23:51:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:51:29,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:29,136 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:29,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:51:29,136 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash -156894512, now seen corresponding path program 6 times [2020-10-13 23:51:29,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:29,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431874346] [2020-10-13 23:51:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:30,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:30,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:30,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:34,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:51:34,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 23:51:34,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:51:34,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:34,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:51:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:51:34,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:34,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:34,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:34,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:34,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:34,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:51:34,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:34,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:34,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:34,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:34,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:34,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:34,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:34,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:34,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:34,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:34,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:34,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:34,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:34,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:34,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-13 23:51:34,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431874346] [2020-10-13 23:51:34,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:34,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:51:34,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925709269] [2020-10-13 23:51:34,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:51:34,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:51:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:51:34,402 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 10 states. [2020-10-13 23:51:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:35,171 INFO L93 Difference]: Finished difference Result 198 states and 217 transitions. [2020-10-13 23:51:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:51:35,172 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 23:51:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:35,175 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:51:35,175 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:51:35,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:51:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:51:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2020-10-13 23:51:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:51:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2020-10-13 23:51:35,193 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 45 [2020-10-13 23:51:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:35,194 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2020-10-13 23:51:35,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:51:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2020-10-13 23:51:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:51:35,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:35,194 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:35,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:51:35,195 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash -596693038, now seen corresponding path program 7 times [2020-10-13 23:51:35,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:35,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721885135] [2020-10-13 23:51:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:35,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:35,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:37,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:37,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:37,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:38,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:39,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:51:39,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:51:39,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4168 [2020-10-13 23:51:39,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:39,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:51:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:51:39,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:39,871 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-13 23:51:40,019 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2020-10-13 23:51:40,283 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-10-13 23:51:40,493 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-10-13 23:51:40,656 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 26 [2020-10-13 23:51:40,820 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-13 23:51:40,973 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2020-10-13 23:51:41,138 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2020-10-13 23:51:41,599 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 18 [2020-10-13 23:51:41,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:41,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:41,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:41,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:41,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:41,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:41,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:41,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:41,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:41,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:41,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:51:41,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721885135] [2020-10-13 23:51:41,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:41,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:51:41,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838232989] [2020-10-13 23:51:41,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:51:41,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:41,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:51:41,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:51:41,740 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand 24 states. [2020-10-13 23:51:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:44,199 INFO L93 Difference]: Finished difference Result 162 states and 175 transitions. [2020-10-13 23:51:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:51:44,200 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-10-13 23:51:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:44,201 INFO L225 Difference]: With dead ends: 162 [2020-10-13 23:51:44,202 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:51:44,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:51:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:51:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2020-10-13 23:51:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:51:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2020-10-13 23:51:44,225 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 47 [2020-10-13 23:51:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:44,226 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2020-10-13 23:51:44,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:51:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2020-10-13 23:51:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:51:44,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:44,227 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:44,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:51:44,227 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:44,227 INFO L82 PathProgramCache]: Analyzing trace with hash -663518808, now seen corresponding path program 2 times [2020-10-13 23:51:44,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:44,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383065935] [2020-10-13 23:51:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:44,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:49,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:49,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:51:49,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:51:49,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:51:49,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:49,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:51:49,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:49,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:51:49,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:49,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:49,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:49,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:49,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:49,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:49,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:49,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:49,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:49,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:49,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:49,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:49,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:49,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:49,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:49,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:49,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:49,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:49,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:49,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:49,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:49,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:49,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:49,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:51:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:49,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:49,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:49,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:49,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:49,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:49,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:49,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:49,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:51:49,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:49,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:51:49,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383065935] [2020-10-13 23:51:49,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:49,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:51:49,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441334250] [2020-10-13 23:51:49,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:51:49,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:51:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:51:49,354 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand 12 states. [2020-10-13 23:51:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:49,930 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2020-10-13 23:51:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:51:49,930 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 23:51:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:49,932 INFO L225 Difference]: With dead ends: 149 [2020-10-13 23:51:49,932 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 23:51:49,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:51:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 23:51:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2020-10-13 23:51:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 23:51:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2020-10-13 23:51:49,946 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 49 [2020-10-13 23:51:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:49,946 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2020-10-13 23:51:49,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:51:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2020-10-13 23:51:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:51:49,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:49,947 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:49,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:51:49,947 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2064570846, now seen corresponding path program 2 times [2020-10-13 23:51:49,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:49,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370262661] [2020-10-13 23:51:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:50,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:51:50,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:51:50,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-13 23:51:50,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:50,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:51:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:51:50,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:12,312 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 14 [2020-10-13 23:52:14,322 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 263 DAG size of output: 18 [2020-10-13 23:52:14,600 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 21 [2020-10-13 23:52:14,737 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 23 [2020-10-13 23:52:15,434 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 18 [2020-10-13 23:52:15,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:15,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:15,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:15,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:15,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:15,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:15,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:15,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:15,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:15,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:15,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:15,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:15,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:15,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:15,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:15,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:15,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:15,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:15,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:52:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:15,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:15,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:15,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:15,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:52:15,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:15,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:52:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:52:15,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:52:15,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370262661] [2020-10-13 23:52:15,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:15,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:52:15,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95771013] [2020-10-13 23:52:15,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:52:15,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:52:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:52:15,548 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand 15 states. [2020-10-13 23:52:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:17,347 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2020-10-13 23:52:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:52:17,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 23:52:17,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:17,350 INFO L225 Difference]: With dead ends: 155 [2020-10-13 23:52:17,350 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 23:52:17,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:52:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 23:52:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 122. [2020-10-13 23:52:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:52:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2020-10-13 23:52:17,372 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 50 [2020-10-13 23:52:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:17,372 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2020-10-13 23:52:17,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:52:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2020-10-13 23:52:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:52:17,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:17,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:17,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:52:17,374 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:17,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:17,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1938752646, now seen corresponding path program 3 times [2020-10-13 23:52:17,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:17,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81893174] [2020-10-13 23:52:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:17,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:17,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:17,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:19,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:19,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:20,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:21,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:21,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:21,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:21,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:22,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:22,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:52:22,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 23:52:22,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:52:22,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:22,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:22,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:52:22,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:22,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:52:22,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:22,807 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2020-10-13 23:52:22,943 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-10-13 23:52:23,862 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 15 [2020-10-13 23:52:23,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:23,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:23,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:23,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:23,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:23,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:23,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:23,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:23,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:23,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:23,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:23,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:23,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:23,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:23,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:23,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:23,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:23,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:23,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 23:52:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:23,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:23,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:23,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:23,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:52:23,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:23,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:23,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:52:23,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:23,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:52:23,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:23,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:52:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:23,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:23,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:23,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:23,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:52:23,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:23,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:52:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:52:23,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:52:23,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81893174] [2020-10-13 23:52:23,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:23,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:52:23,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413268753] [2020-10-13 23:52:23,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:52:23,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:52:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:52:23,996 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand 23 states. [2020-10-13 23:52:25,300 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2020-10-13 23:52:25,837 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-13 23:52:26,016 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-13 23:52:27,210 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-13 23:52:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:27,426 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-10-13 23:52:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:52:27,427 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-13 23:52:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:27,428 INFO L225 Difference]: With dead ends: 136 [2020-10-13 23:52:27,428 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:52:27,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=385, Invalid=2267, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 23:52:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:52:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2020-10-13 23:52:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:52:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-13 23:52:27,445 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 53 [2020-10-13 23:52:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:27,445 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-13 23:52:27,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:52:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-13 23:52:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:52:27,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:27,446 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:27,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:52:27,447 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:27,447 INFO L82 PathProgramCache]: Analyzing trace with hash -202187950, now seen corresponding path program 8 times [2020-10-13 23:52:27,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:27,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424842183] [2020-10-13 23:52:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:27,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:27,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:27,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:29,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:29,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:30,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:32,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:32,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:52:32,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:52:32,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:52:32,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:32,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:52:32,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:32,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:52:32,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:32,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:32,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:32,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:32,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:32,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:32,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:32,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:32,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:32,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:32,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:32,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:32,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:52:32,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:32,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:32,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:32,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:32,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:32,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:32,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:32,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:32,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 70 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:52:32,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424842183] [2020-10-13 23:52:32,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:32,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:52:32,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731755871] [2020-10-13 23:52:32,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:52:32,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:32,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:52:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:52:32,708 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 17 states. [2020-10-13 23:52:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:33,636 INFO L93 Difference]: Finished difference Result 253 states and 280 transitions. [2020-10-13 23:52:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:52:33,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-13 23:52:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:33,641 INFO L225 Difference]: With dead ends: 253 [2020-10-13 23:52:33,641 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 23:52:33,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:52:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 23:52:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 173. [2020-10-13 23:52:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 23:52:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 188 transitions. [2020-10-13 23:52:33,680 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 188 transitions. Word has length 53 [2020-10-13 23:52:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:33,681 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 188 transitions. [2020-10-13 23:52:33,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:52:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 188 transitions. [2020-10-13 23:52:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:52:33,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:33,682 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:33,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:52:33,682 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:33,683 INFO L82 PathProgramCache]: Analyzing trace with hash 498748712, now seen corresponding path program 4 times [2020-10-13 23:52:33,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:33,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964248489] [2020-10-13 23:52:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:33,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:33,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:34,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:34,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:35,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:35,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:36,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:38,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:38,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:52:38,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:52:38,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:52:38,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:38,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:38,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:52:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:52:38,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:39,802 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 30 [2020-10-13 23:52:39,969 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 25 [2020-10-13 23:52:40,140 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 25 [2020-10-13 23:52:40,443 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 23 [2020-10-13 23:52:40,846 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 19 [2020-10-13 23:52:40,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:40,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:40,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:40,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:40,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:40,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:40,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:40,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:40,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:40,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:40,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:40,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:40,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:40,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:40,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:40,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:40,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:40,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:40,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:40,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:40,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:40,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:40,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:40,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:52:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:40,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:40,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:40,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:40,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:40,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:52:40,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:40,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:52:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:52:40,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:52:40,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964248489] [2020-10-13 23:52:40,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:40,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:52:40,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48251153] [2020-10-13 23:52:40,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:52:40,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:40,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:52:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:52:40,980 INFO L87 Difference]: Start difference. First operand 173 states and 188 transitions. Second operand 25 states. [2020-10-13 23:52:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:42,935 INFO L93 Difference]: Finished difference Result 201 states and 219 transitions. [2020-10-13 23:52:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:52:42,935 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-13 23:52:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:42,938 INFO L225 Difference]: With dead ends: 201 [2020-10-13 23:52:42,938 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 23:52:42,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:52:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 23:52:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 177. [2020-10-13 23:52:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 23:52:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 191 transitions. [2020-10-13 23:52:42,970 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 191 transitions. Word has length 55 [2020-10-13 23:52:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:42,971 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 191 transitions. [2020-10-13 23:52:42,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:52:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 191 transitions. [2020-10-13 23:52:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:52:42,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:42,972 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:42,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:52:42,972 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:42,973 INFO L82 PathProgramCache]: Analyzing trace with hash 306522932, now seen corresponding path program 3 times [2020-10-13 23:52:42,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:42,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540196924] [2020-10-13 23:52:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:42,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:43,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:43,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:43,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:52:43,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:52:43,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-13 23:52:43,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:43,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:43,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:52:43,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:43,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:52:43,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:44,385 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 14 [2020-10-13 23:52:45,002 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 26 [2020-10-13 23:52:45,295 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 26 [2020-10-13 23:52:45,469 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 22 [2020-10-13 23:52:45,625 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2020-10-13 23:52:45,788 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 22 [2020-10-13 23:52:45,961 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 22 [2020-10-13 23:52:46,339 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 20 [2020-10-13 23:52:46,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:46,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:46,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:46,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:46,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:46,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:46,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:46,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:46,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:46,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:46,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:46,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:46,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:46,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:46,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:46,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:46,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:46,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:46,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:46,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:46,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:46,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:52:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:46,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:46,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:46,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:46,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:46,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:52:46,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:46,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:46,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:52:46,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:46,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:52:46,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:46,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:52:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:46,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:46,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:46,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:46,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:46,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:52:46,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:46,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:52:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:52:46,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:52:46,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540196924] [2020-10-13 23:52:46,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:46,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:52:46,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445347491] [2020-10-13 23:52:46,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:52:46,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:46,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:52:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:52:46,463 INFO L87 Difference]: Start difference. First operand 177 states and 191 transitions. Second operand 17 states. [2020-10-13 23:52:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:48,979 INFO L93 Difference]: Finished difference Result 230 states and 251 transitions. [2020-10-13 23:52:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:52:48,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-13 23:52:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:48,981 INFO L225 Difference]: With dead ends: 230 [2020-10-13 23:52:48,982 INFO L226 Difference]: Without dead ends: 228 [2020-10-13 23:52:48,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:52:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-13 23:52:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 197. [2020-10-13 23:52:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 23:52:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 212 transitions. [2020-10-13 23:52:49,028 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 212 transitions. Word has length 58 [2020-10-13 23:52:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:49,029 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 212 transitions. [2020-10-13 23:52:49,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:52:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 212 transitions. [2020-10-13 23:52:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:52:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:49,030 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:49,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:52:49,030 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash -711702314, now seen corresponding path program 9 times [2020-10-13 23:52:49,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:49,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485997049] [2020-10-13 23:52:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:49,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:49,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:50,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:50,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:51,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:52,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:53,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:54,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:54,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:52:54,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:52:54,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:52:54,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:54,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:52:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:52:54,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:54,666 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 25 [2020-10-13 23:52:54,808 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 30 [2020-10-13 23:52:54,989 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 31 [2020-10-13 23:52:55,170 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 30 [2020-10-13 23:52:55,367 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2020-10-13 23:52:55,968 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-13 23:52:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:56,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:56,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:56,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:56,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:56,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:56,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:56,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:56,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:56,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:56,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:56,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:56,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:56,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:56,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:56,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:56,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 30 proven. 47 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 23:52:56,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485997049] [2020-10-13 23:52:56,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:56,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:52:56,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525261997] [2020-10-13 23:52:56,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:52:56,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:52:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:52:56,085 INFO L87 Difference]: Start difference. First operand 197 states and 212 transitions. Second operand 19 states. [2020-10-13 23:52:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:57,087 INFO L93 Difference]: Finished difference Result 239 states and 259 transitions. [2020-10-13 23:52:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:52:57,088 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-13 23:52:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:57,092 INFO L225 Difference]: With dead ends: 239 [2020-10-13 23:52:57,092 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 23:52:57,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:52:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 23:52:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2020-10-13 23:52:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-13 23:52:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 215 transitions. [2020-10-13 23:52:57,141 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 215 transitions. Word has length 57 [2020-10-13 23:52:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:57,141 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 215 transitions. [2020-10-13 23:52:57,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:52:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 215 transitions. [2020-10-13 23:52:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:52:57,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:57,143 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:57,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:52:57,143 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:57,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1939190910, now seen corresponding path program 5 times [2020-10-13 23:52:57,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:57,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274988287] [2020-10-13 23:52:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:57,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:57,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:57,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:58,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:58,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:00,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:01,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:02,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:02,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:02,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:53:02,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:53:02,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-13 23:53:02,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:02,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:53:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:53:02,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:04,229 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 25 [2020-10-13 23:53:04,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:04,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:04,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:04,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:04,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:04,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:04,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:04,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:04,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:04,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:04,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:04,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:04,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:04,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:04,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:04,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:04,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:53:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:04,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:04,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:04,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:04,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:04,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:53:04,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:04,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:53:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:53:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:04,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:53:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:04,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:04,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:04,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:04,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:04,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:53:04,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:04,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:04,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:53:04,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:04,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:53:04,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:53:04,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274988287] [2020-10-13 23:53:04,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:04,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:53:04,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476664439] [2020-10-13 23:53:04,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:53:04,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:04,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:53:04,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:53:04,398 INFO L87 Difference]: Start difference. First operand 201 states and 215 transitions. Second operand 27 states. [2020-10-13 23:53:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:09,056 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2020-10-13 23:53:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:53:09,058 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-13 23:53:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:09,059 INFO L225 Difference]: With dead ends: 241 [2020-10-13 23:53:09,059 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 23:53:09,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=365, Invalid=2941, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 23:53:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 23:53:09,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 216. [2020-10-13 23:53:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 23:53:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 232 transitions. [2020-10-13 23:53:09,111 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 232 transitions. Word has length 63 [2020-10-13 23:53:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:09,111 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 232 transitions. [2020-10-13 23:53:09,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:53:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 232 transitions. [2020-10-13 23:53:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:53:09,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:09,113 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:09,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:53:09,113 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:09,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1986541942, now seen corresponding path program 4 times [2020-10-13 23:53:09,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:09,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847011246] [2020-10-13 23:53:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:09,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:09,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:10,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:10,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:53:10,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:53:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1289 [2020-10-13 23:53:10,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:10,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:53:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:53:10,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:10,808 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 14 [2020-10-13 23:53:10,967 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2020-10-13 23:53:11,102 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-10-13 23:53:11,503 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-13 23:53:11,808 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-13 23:53:12,052 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 10 [2020-10-13 23:53:12,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:12,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:12,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:12,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:12,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:12,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:12,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:12,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:12,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:12,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:12,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:12,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:12,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:12,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:12,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:12,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:12,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:12,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:12,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:12,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:12,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:12,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:53:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:12,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:12,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:12,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:12,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:12,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:53:12,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:12,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:53:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:53:12,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:12,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:53:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:12,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:12,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:12,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:12,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:12,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:53:12,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:12,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:53:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:53:12,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:12,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:53:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:12,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:12,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:12,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:12,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:12,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:53:12,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:12,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:53:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:53:12,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:53:12,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847011246] [2020-10-13 23:53:12,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:12,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:53:12,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190453623] [2020-10-13 23:53:12,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:53:12,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:53:12,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:53:12,218 INFO L87 Difference]: Start difference. First operand 216 states and 232 transitions. Second operand 19 states. [2020-10-13 23:53:15,626 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-13 23:53:15,784 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-13 23:53:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:16,957 INFO L93 Difference]: Finished difference Result 303 states and 335 transitions. [2020-10-13 23:53:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:53:16,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-10-13 23:53:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:16,962 INFO L225 Difference]: With dead ends: 303 [2020-10-13 23:53:16,962 INFO L226 Difference]: Without dead ends: 272 [2020-10-13 23:53:16,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=374, Invalid=2382, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 23:53:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-13 23:53:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 224. [2020-10-13 23:53:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 23:53:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 240 transitions. [2020-10-13 23:53:17,015 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 240 transitions. Word has length 66 [2020-10-13 23:53:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:17,015 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 240 transitions. [2020-10-13 23:53:17,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:53:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 240 transitions. [2020-10-13 23:53:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:53:17,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:17,016 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:17,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:53:17,016 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:17,017 INFO L82 PathProgramCache]: Analyzing trace with hash 566764076, now seen corresponding path program 6 times [2020-10-13 23:53:17,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:17,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230622990] [2020-10-13 23:53:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:17,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:17,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:17,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:18,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:18,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:22,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:22,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:53:22,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:53:22,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:53:22,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:22,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:22,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:53:22,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:22,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:53:22,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:22,554 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2020-10-13 23:53:23,426 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-10-13 23:53:23,645 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2020-10-13 23:53:23,967 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 25 [2020-10-13 23:53:24,647 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 17 [2020-10-13 23:53:24,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:24,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:24,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:24,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:24,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:24,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:24,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:24,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:24,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:24,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:24,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:24,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:24,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:24,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:24,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:24,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:24,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:24,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:24,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:53:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:24,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:24,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:24,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:24,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:53:24,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:24,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:24,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:53:24,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:24,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:53:24,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 109 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:53:24,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230622990] [2020-10-13 23:53:24,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:24,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:53:24,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485008151] [2020-10-13 23:53:24,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:53:24,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:53:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:53:24,804 INFO L87 Difference]: Start difference. First operand 224 states and 240 transitions. Second operand 26 states. [2020-10-13 23:53:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:27,327 INFO L93 Difference]: Finished difference Result 246 states and 264 transitions. [2020-10-13 23:53:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:53:27,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 65 [2020-10-13 23:53:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:27,330 INFO L225 Difference]: With dead ends: 246 [2020-10-13 23:53:27,330 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 23:53:27,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=265, Invalid=1627, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:53:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 23:53:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 224. [2020-10-13 23:53:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 23:53:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 240 transitions. [2020-10-13 23:53:27,390 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 240 transitions. Word has length 65 [2020-10-13 23:53:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:27,390 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 240 transitions. [2020-10-13 23:53:27,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:53:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 240 transitions. [2020-10-13 23:53:27,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:53:27,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:27,391 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:27,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:53:27,392 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:27,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1510011646, now seen corresponding path program 7 times [2020-10-13 23:53:27,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:27,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613672616] [2020-10-13 23:53:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:27,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:27,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:27,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:27,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:29,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:29,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:30,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:30,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:31,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:31,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:32,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:53:32,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:53:32,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-13 23:53:32,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:32,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:53:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:53:32,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:32,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:32,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:32,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:32,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:32,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:32,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:32,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:32,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:32,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:32,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:32,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:32,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:32,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:32,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:32,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:32,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:32,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:32,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:32,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:32,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:32,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:32,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:32,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:53:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:32,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:32,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:32,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:53:32,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:32,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:53:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:32,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:53:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:32,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:32,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:32,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:53:32,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:32,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:32,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:32,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:53:32,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:32,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:53:32,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613672616] [2020-10-13 23:53:32,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:32,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:53:32,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254254031] [2020-10-13 23:53:32,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:53:32,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:53:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:53:32,812 INFO L87 Difference]: Start difference. First operand 224 states and 240 transitions. Second operand 17 states. [2020-10-13 23:53:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:34,488 INFO L93 Difference]: Finished difference Result 373 states and 397 transitions. [2020-10-13 23:53:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:53:34,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-13 23:53:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:34,491 INFO L225 Difference]: With dead ends: 373 [2020-10-13 23:53:34,491 INFO L226 Difference]: Without dead ends: 309 [2020-10-13 23:53:34,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:53:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-13 23:53:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2020-10-13 23:53:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 23:53:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 272 transitions. [2020-10-13 23:53:34,571 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 272 transitions. Word has length 67 [2020-10-13 23:53:34,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:34,571 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 272 transitions. [2020-10-13 23:53:34,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:53:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 272 transitions. [2020-10-13 23:53:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:53:34,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:34,576 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:34,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:53:34,577 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash 370632148, now seen corresponding path program 8 times [2020-10-13 23:53:34,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:34,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667259876] [2020-10-13 23:53:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:34,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:34,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:35,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:35,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:35,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:36,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:36,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:37,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:39,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:39,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:53:39,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:53:39,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:53:39,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:39,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:53:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:53:39,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:40,710 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 27 [2020-10-13 23:53:40,952 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 35 [2020-10-13 23:53:41,261 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 35 [2020-10-13 23:53:41,674 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 38 [2020-10-13 23:53:42,091 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 34 [2020-10-13 23:53:42,450 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 29 [2020-10-13 23:53:42,832 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 46 [2020-10-13 23:53:43,228 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2020-10-13 23:53:43,669 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 45 [2020-10-13 23:53:44,081 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2020-10-13 23:53:44,505 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 46 [2020-10-13 23:53:44,757 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 37 [2020-10-13 23:53:46,822 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 483 DAG size of output: 26 [2020-10-13 23:53:47,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:47,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:47,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:47,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:47,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:47,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:47,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:47,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:47,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:47,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:47,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:47,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:47,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:47,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:47,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:47,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:47,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:47,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:47,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:47,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:47,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:47,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:53:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:47,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:47,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:47,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:47,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:53:47,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:47,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:53:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:53:47,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:47,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:53:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:47,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:47,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:47,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:47,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 23:53:47,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:47,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:53:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:47,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:53:47,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:53:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:47,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:47,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:47,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:47,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:47,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:53:47,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:47,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:53:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:53:47,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 80 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:53:47,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667259876] [2020-10-13 23:53:47,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:47,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:53:47,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696354568] [2020-10-13 23:53:47,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:53:47,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:53:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:53:47,201 INFO L87 Difference]: Start difference. First operand 258 states and 272 transitions. Second operand 30 states. [2020-10-13 23:53:47,409 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-13 23:53:48,548 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 23:53:49,478 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-13 23:53:49,868 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-13 23:53:50,052 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-13 23:53:50,262 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 23:53:50,454 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-13 23:53:51,706 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 23:53:52,271 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2020-10-13 23:53:52,723 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2020-10-13 23:53:52,931 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2020-10-13 23:53:53,496 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2020-10-13 23:53:54,474 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 91 [2020-10-13 23:53:55,155 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2020-10-13 23:53:55,461 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-13 23:53:56,327 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 85 [2020-10-13 23:53:56,926 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-13 23:53:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:57,229 INFO L93 Difference]: Finished difference Result 284 states and 302 transitions. [2020-10-13 23:53:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 23:53:57,230 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2020-10-13 23:53:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:57,232 INFO L225 Difference]: With dead ends: 284 [2020-10-13 23:53:57,232 INFO L226 Difference]: Without dead ends: 282 [2020-10-13 23:53:57,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=682, Invalid=4010, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 23:53:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-13 23:53:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 229. [2020-10-13 23:53:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-13 23:53:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 243 transitions. [2020-10-13 23:53:57,293 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 243 transitions. Word has length 71 [2020-10-13 23:53:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:57,294 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 243 transitions. [2020-10-13 23:53:57,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:53:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 243 transitions. [2020-10-13 23:53:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:53:57,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:57,295 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:57,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:53:57,296 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:57,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1544570242, now seen corresponding path program 9 times [2020-10-13 23:53:57,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:57,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095958741] [2020-10-13 23:53:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:57,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:58,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:58,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:59,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:01,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:01,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:02,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:54:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:03,118 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 34 [2020-10-13 23:54:03,333 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 36 [2020-10-13 23:54:03,497 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2020-10-13 23:54:03,663 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 24 [2020-10-13 23:54:03,828 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 21 [2020-10-13 23:54:04,020 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2020-10-13 23:54:04,216 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 23 [2020-10-13 23:54:04,412 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 24 [2020-10-13 23:54:04,704 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 18 [2020-10-13 23:54:04,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:04,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:04,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:04,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:04,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:54:04,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:04,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:04,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:04,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:04,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:04,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:04,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:04,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:04,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:54:04,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:04,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:04,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:04,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:54:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:04,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:04,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:04,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:04,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:54:04,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:04,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:04,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:54:04,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:04,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:54:04,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:04,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:54:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:04,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:04,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:04,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:04,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:04,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:54:04,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:04,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:04,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:54:04,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:04,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:54:04,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 107 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 23:54:04,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095958741] [2020-10-13 23:54:04,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:54:04,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:54:04,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587043408] [2020-10-13 23:54:04,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:54:04,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:54:04,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:54:04,898 INFO L87 Difference]: Start difference. First operand 229 states and 243 transitions. Second operand 26 states. [2020-10-13 23:54:06,413 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-10-13 23:54:07,900 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-13 23:54:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:08,655 INFO L93 Difference]: Finished difference Result 277 states and 297 transitions. [2020-10-13 23:54:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:54:08,657 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-10-13 23:54:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:08,659 INFO L225 Difference]: With dead ends: 277 [2020-10-13 23:54:08,659 INFO L226 Difference]: Without dead ends: 275 [2020-10-13 23:54:08,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:54:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-13 23:54:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 243. [2020-10-13 23:54:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-13 23:54:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 259 transitions. [2020-10-13 23:54:08,722 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 259 transitions. Word has length 73 [2020-10-13 23:54:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:08,722 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 259 transitions. [2020-10-13 23:54:08,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:54:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 259 transitions. [2020-10-13 23:54:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:54:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:08,724 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:54:08,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:54:08,725 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash -950705878, now seen corresponding path program 10 times [2020-10-13 23:54:08,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:08,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686342714] [2020-10-13 23:54:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:08,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:09,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:09,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:09,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:10,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:10,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:11,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:12,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:12,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:13,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:13,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:54:13,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:54:13,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:54:13,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:13,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:54:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:54:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 23:54:13,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:14,791 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 23 [2020-10-13 23:54:14,961 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2020-10-13 23:54:15,133 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2020-10-13 23:54:15,440 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 24 [2020-10-13 23:54:15,621 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 24 [2020-10-13 23:54:15,809 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2020-10-13 23:54:15,992 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2020-10-13 23:54:16,194 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 24 [2020-10-13 23:54:17,593 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 373 DAG size of output: 26