/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=BIGGEST --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-crafted/zero_sum2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:39:06,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:39:06,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:39:06,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:39:06,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:39:06,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:39:06,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:39:06,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:39:06,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:39:06,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:39:06,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:39:06,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:39:06,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:39:06,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:39:06,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:39:06,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:39:06,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:39:06,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:39:06,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:39:06,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:39:06,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:39:06,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:39:06,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:39:06,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:39:06,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:39:06,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:39:06,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:39:06,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:39:06,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:39:06,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:39:06,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:39:06,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:39:06,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:39:06,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:39:06,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:39:06,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:39:06,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:39:06,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:39:06,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:39:06,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:39:06,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:39:06,507 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 [2020-10-12 09:39:06,557 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:39:06,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:39:06,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:39:06,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:39:06,562 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:39:06,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:39:06,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:39:06,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:39:06,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:39:06,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:39:06,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:39:06,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:39:06,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:39:06,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:39:06,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:39:06,565 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:39:06,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:39:06,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:39:06,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:39:06,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:39:06,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:39:06,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:39:06,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:39:06,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:39:06,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:39:06,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:39:06,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:39:06,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:39:06,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:39:06,568 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:39:06,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:39:06,911 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:39:06,917 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:39:06,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:39:06,921 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:39:06,922 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c [2020-10-12 09:39:06,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5268e10d/557a87c8381b4c26a23b30cd9af8b51e/FLAGf40afdee5 [2020-10-12 09:39:07,483 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:39:07,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum2.c [2020-10-12 09:39:07,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5268e10d/557a87c8381b4c26a23b30cd9af8b51e/FLAGf40afdee5 [2020-10-12 09:39:07,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5268e10d/557a87c8381b4c26a23b30cd9af8b51e [2020-10-12 09:39:07,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:39:07,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:39:07,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:39:07,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:39:07,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:39:07,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:39:07" (1/1) ... [2020-10-12 09:39:07,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:07, skipping insertion in model container [2020-10-12 09:39:07,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:39:07" (1/1) ... [2020-10-12 09:39:07,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:39:07,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:39:08,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:39:08,096 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:39:08,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:39:08,160 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:39:08,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08 WrapperNode [2020-10-12 09:39:08,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:39:08,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:39:08,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:39:08,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:39:08,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (1/1) ... [2020-10-12 09:39:08,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (1/1) ... [2020-10-12 09:39:08,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (1/1) ... [2020-10-12 09:39:08,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (1/1) ... [2020-10-12 09:39:08,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (1/1) ... [2020-10-12 09:39:08,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (1/1) ... [2020-10-12 09:39:08,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (1/1) ... [2020-10-12 09:39:08,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:39:08,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:39:08,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:39:08,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:39:08,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (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 [2020-10-12 09:39:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:39:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:39:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 09:39:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:39:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:39:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:39:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 09:39:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 09:39:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:39:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-12 09:39:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:39:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:39:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:39:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:39:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:39:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:39:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:39:08,654 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:39:08,655 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 09:39:08,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:39:08 BoogieIcfgContainer [2020-10-12 09:39:08,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:39:08,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:39:08,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:39:08,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:39:08,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:39:07" (1/3) ... [2020-10-12 09:39:08,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756ae598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:39:08, skipping insertion in model container [2020-10-12 09:39:08,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:08" (2/3) ... [2020-10-12 09:39:08,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756ae598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:39:08, skipping insertion in model container [2020-10-12 09:39:08,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:39:08" (3/3) ... [2020-10-12 09:39:08,667 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2020-10-12 09:39:08,679 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:39:08,688 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:39:08,703 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:39:08,728 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:39:08,728 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:39:08,728 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:39:08,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:39:08,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:39:08,729 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:39:08,729 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:39:08,729 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:39:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-12 09:39:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 09:39:08,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:08,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:08,779 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:08,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1619448805, now seen corresponding path program 1 times [2020-10-12 09:39:08,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:08,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408928150] [2020-10-12 09:39:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:08,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:08,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:09,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:09,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:09,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:10,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 09:39:10,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:39:10,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-10-12 09:39:10,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:39:10,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:39:10,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:10,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:10,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:10,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:10,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:39:10,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:10,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:10,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:10,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:10,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408928150] [2020-10-12 09:39:10,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:39:10,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:39:10,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242610356] [2020-10-12 09:39:10,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:10,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:10,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:10,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:10,244 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 6 states. [2020-10-12 09:39:10,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:10,462 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2020-10-12 09:39:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:39:10,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 09:39:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:10,474 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:39:10,475 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 09:39:10,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:39:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 09:39:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 09:39:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:39:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-12 09:39:10,524 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-10-12 09:39:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:10,524 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-12 09:39:10,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-12 09:39:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:39:10,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:10,526 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] [2020-10-12 09:39:10,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:39:10,527 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:10,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:10,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1525042861, now seen corresponding path program 1 times [2020-10-12 09:39:10,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:10,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640535611] [2020-10-12 09:39:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:10,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:11,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:11,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:39:11,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:39:11,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-12 09:39:11,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:11,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:11,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:11,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:39:11,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:11,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:11,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:11,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:11,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:11,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:11,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:39:11,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:11,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:11,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:39:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:11,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640535611] [2020-10-12 09:39:11,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:39:11,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:39:11,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994468133] [2020-10-12 09:39:11,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:11,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:11,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:11,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:11,867 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-10-12 09:39:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:12,124 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-10-12 09:39:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:39:12,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 09:39:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:12,127 INFO L225 Difference]: With dead ends: 62 [2020-10-12 09:39:12,127 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 09:39:12,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:39:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 09:39:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-12 09:39:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:39:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-12 09:39:12,149 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2020-10-12 09:39:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:12,150 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-12 09:39:12,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-12 09:39:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:39:12,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:12,152 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] [2020-10-12 09:39:12,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:39:12,153 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:12,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1185906157, now seen corresponding path program 1 times [2020-10-12 09:39:12,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:12,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643725777] [2020-10-12 09:39:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:12,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:12,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:12,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:12,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:12,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:12,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:13,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:13,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:39:13,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:39:13,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1179 [2020-10-12 09:39:13,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:13,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:13,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:13,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:39:13,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:13,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:13,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:13,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:13,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:13,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:13,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:39:13,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:13,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:13,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:13,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643725777] [2020-10-12 09:39:13,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:13,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:39:13,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231256471] [2020-10-12 09:39:13,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:13,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:13,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:13,428 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-12 09:39:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:13,618 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-12 09:39:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:39:13,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 09:39:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:13,620 INFO L225 Difference]: With dead ends: 39 [2020-10-12 09:39:13,620 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 09:39:13,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:39:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 09:39:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 09:39:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 09:39:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-12 09:39:13,628 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-10-12 09:39:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:13,628 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-12 09:39:13,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:13,629 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-12 09:39:13,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:39:13,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:13,630 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, 1] [2020-10-12 09:39:13,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:39:13,631 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:13,631 INFO L82 PathProgramCache]: Analyzing trace with hash 856145037, now seen corresponding path program 1 times [2020-10-12 09:39:13,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:13,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327117230] [2020-10-12 09:39:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:13,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:13,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:13,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:13,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:18,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:18,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:39:18,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 09:39:18,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4827 [2020-10-12 09:39:18,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:39:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:39:18,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:18,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:18,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:18,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:18,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:18,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:18,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:39:18,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:18,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:19,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327117230] [2020-10-12 09:39:19,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:19,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:39:19,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031811031] [2020-10-12 09:39:19,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:39:19,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:19,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:39:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:39:19,008 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 15 states. [2020-10-12 09:39:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:19,460 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-12 09:39:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:39:19,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-12 09:39:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:19,461 INFO L225 Difference]: With dead ends: 49 [2020-10-12 09:39:19,462 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:39:19,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:39:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:39:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 09:39:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:39:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-12 09:39:19,479 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 28 [2020-10-12 09:39:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:19,479 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-12 09:39:19,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:39:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-12 09:39:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:39:19,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:19,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:19,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:39:19,483 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:19,484 INFO L82 PathProgramCache]: Analyzing trace with hash -861187893, now seen corresponding path program 2 times [2020-10-12 09:39:19,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:19,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375029427] [2020-10-12 09:39:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:19,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:19,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:19,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:19,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:19,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:20,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:21,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:39:21,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:39:21,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2198 [2020-10-12 09:39:21,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:39:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:39:21,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:21,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:21,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:21,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:21,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:39:21,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:21,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:39:21,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375029427] [2020-10-12 09:39:21,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:21,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:39:21,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365746875] [2020-10-12 09:39:21,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:39:21,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:21,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:39:21,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:39:21,766 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 8 states. [2020-10-12 09:39:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:22,090 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-12 09:39:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:39:22,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-12 09:39:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:22,092 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:39:22,092 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 09:39:22,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:39:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 09:39:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-12 09:39:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 09:39:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-12 09:39:22,116 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-12 09:39:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:22,116 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-12 09:39:22,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:39:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-12 09:39:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:39:22,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:22,119 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:22,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:39:22,120 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2014822795, now seen corresponding path program 3 times [2020-10-12 09:39:22,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:22,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683730987] [2020-10-12 09:39:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:22,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:23,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:23,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:39:23,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:39:23,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1581 [2020-10-12 09:39:23,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:39:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:39:23,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:23,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:23,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:23,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:23,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:23,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:39:23,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:23,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:23,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:23,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:39:23,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683730987] [2020-10-12 09:39:23,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:23,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:39:23,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127748473] [2020-10-12 09:39:23,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:39:23,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:23,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:39:23,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:39:23,794 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-10-12 09:39:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:24,016 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-12 09:39:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:39:24,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-12 09:39:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:24,018 INFO L225 Difference]: With dead ends: 51 [2020-10-12 09:39:24,018 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 09:39:24,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:39:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 09:39:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 09:39:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:39:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 09:39:24,027 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2020-10-12 09:39:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:24,029 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 09:39:24,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:39:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 09:39:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:39:24,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:24,033 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] [2020-10-12 09:39:24,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:39:24,034 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:24,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1640283643, now seen corresponding path program 4 times [2020-10-12 09:39:24,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:24,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757485050] [2020-10-12 09:39:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:24,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:24,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:24,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:24,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:25,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:25,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:25,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:25,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:25,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:28,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:28,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:29,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:29,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:29,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:39:29,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-12 09:39:29,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-12 09:39:29,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:29,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:39:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:29,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:39:29,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 09:39:30,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:30,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:30,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:30,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:30,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:30,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:39:30,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:30,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:30,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:30,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:30,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:30,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757485050] [2020-10-12 09:39:30,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:30,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:39:30,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424951999] [2020-10-12 09:39:30,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:39:30,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:39:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:39:30,996 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 26 states. [2020-10-12 09:39:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:32,449 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-10-12 09:39:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:39:32,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2020-10-12 09:39:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:32,451 INFO L225 Difference]: With dead ends: 67 [2020-10-12 09:39:32,451 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:39:32,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:39:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:39:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-12 09:39:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:39:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-12 09:39:32,469 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 36 [2020-10-12 09:39:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:32,469 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-12 09:39:32,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:39:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-12 09:39:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:39:32,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:32,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 09:39:32,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:39:32,471 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash 957569091, now seen corresponding path program 5 times [2020-10-12 09:39:32,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:32,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106852688] [2020-10-12 09:39:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:32,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:32,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:32,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:32,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:37,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:37,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:39:37,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:39:37,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:39:37,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:37,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:39:37,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:37,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:39:37,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:37,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:37,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:37,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:37,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:37,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:37,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:39:37,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:39:37,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106852688] [2020-10-12 09:39:37,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:37,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:39:37,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922301390] [2020-10-12 09:39:37,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:39:37,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:39:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:39:37,567 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 10 states. [2020-10-12 09:39:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:37,860 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2020-10-12 09:39:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:39:37,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-12 09:39:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:37,862 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:39:37,862 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 09:39:37,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:39:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 09:39:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-12 09:39:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:39:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-12 09:39:37,873 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 38 [2020-10-12 09:39:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:37,873 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-12 09:39:37,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:39:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-12 09:39:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:39:37,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:37,874 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 09:39:37,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:39:37,874 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:37,875 INFO L82 PathProgramCache]: Analyzing trace with hash 15558915, now seen corresponding path program 6 times [2020-10-12 09:39:37,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:37,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901771699] [2020-10-12 09:39:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:37,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:37,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:37,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:38,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:41,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:41,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:39:41,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:39:41,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3883 [2020-10-12 09:39:41,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:39:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:39:41,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:41,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:41,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:41,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:41,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:41,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:39:41,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:41,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:41,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:41,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:39:41,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901771699] [2020-10-12 09:39:41,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:41,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:39:41,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614823946] [2020-10-12 09:39:41,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:39:41,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:39:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:39:41,870 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-10-12 09:39:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:42,154 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-12 09:39:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:39:42,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-12 09:39:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:42,156 INFO L225 Difference]: With dead ends: 63 [2020-10-12 09:39:42,156 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:39:42,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:39:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:39:42,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 09:39:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 09:39:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-12 09:39:42,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-10-12 09:39:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:42,168 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-12 09:39:42,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:39:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-12 09:39:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:39:42,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:42,170 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:42,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:39:42,170 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash 723988349, now seen corresponding path program 7 times [2020-10-12 09:39:42,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:42,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422877405] [2020-10-12 09:39:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:42,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:42,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:42,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:42,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:42,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:43,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:43,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:43,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:43,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:43,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:44,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:44,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:45,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:45,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:45,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:47,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:47,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:47,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:47,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:39:47,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-12 09:39:47,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:39:47,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:47,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:39:47,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:47,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:39:47,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:49,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:49,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:49,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:49,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:50,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:50,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:39:50,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:50,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:50,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:50,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:50,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:50,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422877405] [2020-10-12 09:39:50,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:50,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:39:50,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114625132] [2020-10-12 09:39:50,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:39:50,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:50,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:39:50,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:39:50,024 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 33 states. [2020-10-12 09:39:50,707 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 68 [2020-10-12 09:39:51,264 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2020-10-12 09:39:51,854 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2020-10-12 09:39:52,210 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-10-12 09:39:52,502 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-12 09:39:52,805 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2020-10-12 09:39:53,073 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2020-10-12 09:39:53,427 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2020-10-12 09:39:53,793 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 52 [2020-10-12 09:39:54,620 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2020-10-12 09:39:54,926 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-10-12 09:39:55,367 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 69 [2020-10-12 09:39:55,769 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-12 09:39:56,170 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2020-10-12 09:39:56,639 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 63 [2020-10-12 09:39:56,908 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-12 09:39:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:57,297 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-10-12 09:39:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:39:57,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-10-12 09:39:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:57,300 INFO L225 Difference]: With dead ends: 90 [2020-10-12 09:39:57,300 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:39:57,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=547, Invalid=2993, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:39:57,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:39:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 09:39:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:39:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-12 09:39:57,320 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 44 [2020-10-12 09:39:57,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:57,320 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-12 09:39:57,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:39:57,320 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-12 09:39:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:39:57,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:57,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-12 09:39:57,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:39:57,322 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash 3766395, now seen corresponding path program 8 times [2020-10-12 09:39:57,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:57,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831539958] [2020-10-12 09:39:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:57,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:57,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:57,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:02,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:02,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:40:02,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:40:02,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:40:02,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:02,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:40:02,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:40:02,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:40:02,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:02,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:02,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:02,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:02,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:02,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:02,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:02,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:02,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 09:40:02,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831539958] [2020-10-12 09:40:02,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:02,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:40:02,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531857614] [2020-10-12 09:40:02,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:40:02,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:02,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:40:02,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:40:02,422 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 12 states. [2020-10-12 09:40:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:02,853 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-12 09:40:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:40:02,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-12 09:40:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:02,855 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:40:02,855 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:40:02,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:40:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:40:02,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 09:40:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 09:40:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-12 09:40:02,867 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 46 [2020-10-12 09:40:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:02,868 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-12 09:40:02,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:40:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-12 09:40:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:40:02,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:02,869 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:02,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:40:02,870 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash 775128309, now seen corresponding path program 9 times [2020-10-12 09:40:02,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:02,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041659287] [2020-10-12 09:40:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:02,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:02,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:03,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:03,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:03,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:04,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:04,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:05,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:05,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:06,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:07,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:07,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:07,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:40:07,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 09:40:07,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 09:40:07,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:07,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 09:40:07,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:40:07,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 09:40:07,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:11,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:11,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:11,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:11,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:11,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:11,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:11,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:11,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:40:11,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041659287] [2020-10-12 09:40:11,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:11,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 09:40:11,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058353616] [2020-10-12 09:40:11,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 09:40:11,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:11,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 09:40:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1628, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:40:11,350 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 42 states. [2020-10-12 09:40:11,874 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-12 09:40:12,297 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-12 09:40:12,762 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-12 09:40:13,863 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2020-10-12 09:40:14,113 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-12 09:40:14,599 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-12 09:40:14,880 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-12 09:40:15,312 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-12 09:40:15,753 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-12 09:40:16,661 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-12 09:40:17,157 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-10-12 09:40:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:18,392 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-12 09:40:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:40:18,393 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 52 [2020-10-12 09:40:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:18,394 INFO L225 Difference]: With dead ends: 91 [2020-10-12 09:40:18,394 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 09:40:18,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=278, Invalid=4144, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 09:40:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 09:40:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-10-12 09:40:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:40:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-12 09:40:18,408 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 52 [2020-10-12 09:40:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:18,409 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-12 09:40:18,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 09:40:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-12 09:40:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:40:18,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:18,412 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-10-12 09:40:18,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:40:18,420 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1408852173, now seen corresponding path program 10 times [2020-10-12 09:40:18,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:18,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383032446] [2020-10-12 09:40:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:18,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:18,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:18,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:23,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:23,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:40:23,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:40:23,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:40:23,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:40:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 09:40:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:40:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:23,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:23,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:23,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:23,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:23,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:23,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 09:40:23,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383032446] [2020-10-12 09:40:23,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:23,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:40:23,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017028716] [2020-10-12 09:40:23,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:40:23,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:23,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:40:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:40:23,561 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 14 states. [2020-10-12 09:40:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:24,038 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2020-10-12 09:40:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:40:24,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-12 09:40:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:24,045 INFO L225 Difference]: With dead ends: 148 [2020-10-12 09:40:24,045 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 09:40:24,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:40:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 09:40:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-12 09:40:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 09:40:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-12 09:40:24,056 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 54 [2020-10-12 09:40:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:24,056 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-12 09:40:24,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:40:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-12 09:40:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:40:24,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:24,057 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-10-12 09:40:24,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:40:24,058 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash 744746995, now seen corresponding path program 11 times [2020-10-12 09:40:24,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:24,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872675169] [2020-10-12 09:40:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:24,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:24,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:24,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:24,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:29,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:29,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:40:29,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:40:29,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:40:29,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:40:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:40:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:40:29,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:29,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:29,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:29,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:29,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:29,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:29,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:29,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:29,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:29,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:29,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:29,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 09:40:29,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872675169] [2020-10-12 09:40:29,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:29,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:40:29,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465191694] [2020-10-12 09:40:29,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:40:29,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:40:29,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:40:29,203 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2020-10-12 09:40:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:29,778 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-10-12 09:40:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:40:29,779 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-12 09:40:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:29,780 INFO L225 Difference]: With dead ends: 87 [2020-10-12 09:40:29,780 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:40:29,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:40:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:40:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 09:40:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:40:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-12 09:40:29,788 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 54 [2020-10-12 09:40:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:29,788 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-12 09:40:29,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:40:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-12 09:40:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:40:29,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:29,790 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:29,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:40:29,790 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:29,790 INFO L82 PathProgramCache]: Analyzing trace with hash 97010285, now seen corresponding path program 12 times [2020-10-12 09:40:29,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:29,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106794222] [2020-10-12 09:40:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:29,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:29,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:30,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:30,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:31,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:31,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:32,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:33,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:34,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:34,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:40:34,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:40:34,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:40:34,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:34,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 09:40:34,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:40:34,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:40:34,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:36,480 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-12 09:40:36,970 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 19 [2020-10-12 09:40:38,546 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-12 09:40:38,783 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-12 09:40:40,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:40,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:40,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:40,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:40,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:40,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:40,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:40,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:40:40,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106794222] [2020-10-12 09:40:40,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:40,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 09:40:40,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692290247] [2020-10-12 09:40:40,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 09:40:40,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 09:40:40,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2228, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:40:40,582 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 50 states. [2020-10-12 09:40:41,164 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 76 [2020-10-12 09:40:43,002 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2020-10-12 09:40:44,335 WARN L193 SmtUtils]: Spent 990.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 122 [2020-10-12 09:40:45,596 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 175 DAG size of output: 141 [2020-10-12 09:40:45,960 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2020-10-12 09:40:46,639 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2020-10-12 09:40:47,298 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 106 [2020-10-12 09:40:47,640 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-12 09:40:48,296 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 105 [2020-10-12 09:40:48,777 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-12 09:40:49,265 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-10-12 09:40:49,698 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-12 09:40:50,201 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-10-12 09:40:50,665 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-12 09:40:51,131 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2020-10-12 09:40:51,515 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2020-10-12 09:40:51,995 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2020-10-12 09:40:52,442 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 51 [2020-10-12 09:40:53,575 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 113 [2020-10-12 09:40:54,036 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 62 [2020-10-12 09:40:55,060 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 115 [2020-10-12 09:40:55,735 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 105 [2020-10-12 09:40:56,922 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 171 DAG size of output: 125 [2020-10-12 09:40:57,415 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-10-12 09:40:57,734 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-12 09:40:58,148 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-12 09:40:58,470 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-12 09:40:58,708 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-12 09:40:59,162 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 09:40:59,775 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2020-10-12 09:41:01,062 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 160 DAG size of output: 124 [2020-10-12 09:41:02,041 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 132 [2020-10-12 09:41:02,802 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 118 [2020-10-12 09:41:03,117 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-12 09:41:03,473 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-12 09:41:04,387 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-12 09:41:04,760 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 72 [2020-10-12 09:41:05,162 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-12 09:41:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:05,612 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-10-12 09:41:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 09:41:05,613 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 60 [2020-10-12 09:41:05,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:05,614 INFO L225 Difference]: With dead ends: 112 [2020-10-12 09:41:05,614 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 09:41:05,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=1347, Invalid=9573, Unknown=0, NotChecked=0, Total=10920 [2020-10-12 09:41:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 09:41:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-10-12 09:41:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:41:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-12 09:41:05,629 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 60 [2020-10-12 09:41:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:05,630 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-12 09:41:05,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 09:41:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-12 09:41:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:41:05,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:05,631 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 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] [2020-10-12 09:41:05,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:41:05,632 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1608610069, now seen corresponding path program 13 times [2020-10-12 09:41:05,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:05,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000795472] [2020-10-12 09:41:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:05,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:05,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:05,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:07,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:10,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:10,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:41:10,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:41:10,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:41:10,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:10,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:41:10,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 09:41:10,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:41:10,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:10,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:10,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:10,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:10,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:10,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:10,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:41:10,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:10,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:10,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:41:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-12 09:41:10,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000795472] [2020-10-12 09:41:10,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:10,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:41:10,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891818969] [2020-10-12 09:41:10,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:41:10,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:10,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:41:10,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:41:10,899 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 16 states. [2020-10-12 09:41:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:11,779 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2020-10-12 09:41:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:41:11,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-12 09:41:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:11,781 INFO L225 Difference]: With dead ends: 160 [2020-10-12 09:41:11,782 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 09:41:11,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:41:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 09:41:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-12 09:41:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 09:41:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2020-10-12 09:41:11,803 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 62 [2020-10-12 09:41:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:11,803 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2020-10-12 09:41:11,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:41:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2020-10-12 09:41:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:41:11,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:11,808 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 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] [2020-10-12 09:41:11,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:41:11,808 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:11,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1171574635, now seen corresponding path program 14 times [2020-10-12 09:41:11,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:11,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942403076] [2020-10-12 09:41:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:11,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:11,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:11,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:13,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:16,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:16,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:41:16,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:41:16,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:41:16,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:16,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:41:16,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:41:16,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:41:16,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:17,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:17,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:17,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:17,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:17,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:17,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:41:17,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:17,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-12 09:41:17,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942403076] [2020-10-12 09:41:17,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:17,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:41:17,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512161125] [2020-10-12 09:41:17,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:41:17,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:41:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:41:17,045 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 16 states. [2020-10-12 09:41:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:17,838 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-12 09:41:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:41:17,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-12 09:41:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:17,841 INFO L225 Difference]: With dead ends: 99 [2020-10-12 09:41:17,841 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:41:17,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:41:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:41:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 09:41:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 09:41:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-12 09:41:17,853 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 62 [2020-10-12 09:41:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:17,853 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-12 09:41:17,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:41:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-12 09:41:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:41:17,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:17,854 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:41:17,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:41:17,854 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:17,855 INFO L82 PathProgramCache]: Analyzing trace with hash 441280485, now seen corresponding path program 15 times [2020-10-12 09:41:17,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:17,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818731609] [2020-10-12 09:41:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:17,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:17,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:18,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:19,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:20,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:21,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:22,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:22,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:41:22,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:41:22,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:41:22,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:22,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 09:41:22,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:41:22,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 09:41:22,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:25,268 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-12 09:41:25,896 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-10-12 09:41:27,463 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-12 09:41:27,739 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-12 09:41:27,999 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-12 09:41:30,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:30,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:30,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:30,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:30,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:30,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:41:30,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:30,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:41:30,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818731609] [2020-10-12 09:41:30,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:30,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 09:41:30,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99042519] [2020-10-12 09:41:30,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 09:41:30,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:30,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 09:41:30,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3186, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:41:30,739 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 59 states. [2020-10-12 09:41:33,206 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-10-12 09:41:33,653 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-12 09:41:33,993 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-12 09:41:35,116 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 135 [2020-10-12 09:41:35,739 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 46 [2020-10-12 09:41:36,753 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 93 [2020-10-12 09:41:37,429 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-10-12 09:41:38,300 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 116 [2020-10-12 09:41:38,794 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-12 09:41:39,180 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-10-12 09:41:39,568 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-12 09:41:39,894 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-12 09:41:40,121 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-12 09:41:41,553 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2020-10-12 09:41:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:43,709 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2020-10-12 09:41:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:41:43,711 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 68 [2020-10-12 09:41:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:43,713 INFO L225 Difference]: With dead ends: 123 [2020-10-12 09:41:43,713 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:41:43,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=682, Invalid=7150, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 09:41:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:41:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-10-12 09:41:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:41:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2020-10-12 09:41:43,731 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 68 [2020-10-12 09:41:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:43,732 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2020-10-12 09:41:43,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 09:41:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2020-10-12 09:41:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:41:43,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:43,733 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:41:43,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:41:43,733 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:43,733 INFO L82 PathProgramCache]: Analyzing trace with hash -114063837, now seen corresponding path program 16 times [2020-10-12 09:41:43,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:43,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452698426] [2020-10-12 09:41:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:43,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:43,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:43,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:43,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:48,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:48,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 09:41:48,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:41:48,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:41:48,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:41:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 09:41:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:41:48,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:49,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:49,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:49,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:49,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:49,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:49,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:41:49,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:49,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-12 09:41:49,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452698426] [2020-10-12 09:41:49,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:49,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:41:49,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029432411] [2020-10-12 09:41:49,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:41:49,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:41:49,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:41:49,020 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand 18 states. [2020-10-12 09:41:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:49,965 INFO L93 Difference]: Finished difference Result 192 states and 205 transitions. [2020-10-12 09:41:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:41:49,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-12 09:41:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:49,968 INFO L225 Difference]: With dead ends: 192 [2020-10-12 09:41:49,968 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 09:41:49,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:41:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 09:41:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-12 09:41:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 09:41:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-10-12 09:41:49,984 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 70 [2020-10-12 09:41:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:49,985 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-10-12 09:41:49,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:41:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-10-12 09:41:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:41:49,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:49,985 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:41:49,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:41:49,986 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:49,986 INFO L82 PathProgramCache]: Analyzing trace with hash 385095395, now seen corresponding path program 17 times [2020-10-12 09:41:49,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:49,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735923757] [2020-10-12 09:41:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:49,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:49,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:54,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:54,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 09:41:54,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:41:54,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:41:54,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:54,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:41:54,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:41:54,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:41:54,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:55,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:55,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:55,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:55,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:55,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:55,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:41:55,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:55,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-12 09:41:55,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735923757] [2020-10-12 09:41:55,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:55,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:41:55,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531112012] [2020-10-12 09:41:55,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:41:55,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:55,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:41:55,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:41:55,251 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 18 states. [2020-10-12 09:41:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:56,260 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2020-10-12 09:41:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:41:56,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-12 09:41:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:56,263 INFO L225 Difference]: With dead ends: 111 [2020-10-12 09:41:56,263 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 09:41:56,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:41:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 09:41:56,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-12 09:41:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 09:41:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-12 09:41:56,273 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 70 [2020-10-12 09:41:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:56,273 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-12 09:41:56,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:41:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-12 09:41:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 09:41:56,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:56,274 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:41:56,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:41:56,275 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:56,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:56,275 INFO L82 PathProgramCache]: Analyzing trace with hash -567610019, now seen corresponding path program 18 times [2020-10-12 09:41:56,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:56,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234264996] [2020-10-12 09:41:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:56,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:56,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:57,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:59,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:00,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:01,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:01,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 09:42:01,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:42:01,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:42:01,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:01,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 09:42:01,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:42:01,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 09:42:01,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:03,229 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-12 09:42:03,442 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-12 09:42:04,498 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-12 09:42:05,425 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-12 09:42:05,633 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-12 09:42:05,864 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-12 09:42:06,126 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-12 09:42:06,397 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-12 09:42:08,742 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-12 09:42:09,061 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 09:42:13,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:42:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:13,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:13,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:13,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:42:13,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:42:13,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:42:13,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:13,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:42:13,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:42:13,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:42:13,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:42:14,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234264996] [2020-10-12 09:42:14,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:42:14,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 09:42:14,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247380858] [2020-10-12 09:42:14,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 09:42:14,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:42:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 09:42:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=3950, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 09:42:14,004 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 67 states. [2020-10-12 09:42:18,642 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 189 DAG size of output: 168 [2020-10-12 09:42:19,006 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-12 09:42:21,404 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 173 DAG size of output: 154 [2020-10-12 09:42:22,598 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 136 [2020-10-12 09:42:23,283 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-12 09:42:23,996 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-12 09:42:24,504 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-12 09:42:25,055 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-12 09:42:25,498 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-12 09:42:25,936 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-12 09:42:27,703 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 184 DAG size of output: 164 [2020-10-12 09:42:28,078 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-12 09:42:29,398 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2020-10-12 09:42:30,088 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 31 [2020-10-12 09:42:30,750 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 25 [2020-10-12 09:42:31,300 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 34 [2020-10-12 09:42:31,858 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 29 [2020-10-12 09:42:32,403 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 30 [2020-10-12 09:42:32,955 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 33 [2020-10-12 09:42:34,374 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 167 DAG size of output: 122 [2020-10-12 09:42:35,823 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 113 [2020-10-12 09:42:36,632 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 102 [2020-10-12 09:42:37,195 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-12 09:42:37,677 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-12 09:42:40,906 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 179 DAG size of output: 159 [2020-10-12 09:42:42,172 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-12 09:42:43,151 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-12 09:42:44,032 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-12 09:42:45,162 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 09:42:45,954 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-12 09:42:46,632 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-12 09:42:47,341 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-12 09:42:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:42:48,435 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2020-10-12 09:42:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-12 09:42:48,439 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 76 [2020-10-12 09:42:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:42:48,440 INFO L225 Difference]: With dead ends: 166 [2020-10-12 09:42:48,440 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 09:42:48,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=1521, Invalid=10689, Unknown=0, NotChecked=0, Total=12210 [2020-10-12 09:42:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 09:42:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 128. [2020-10-12 09:42:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 09:42:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2020-10-12 09:42:48,469 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 76 [2020-10-12 09:42:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:42:48,469 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2020-10-12 09:42:48,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 09:42:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2020-10-12 09:42:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 09:42:48,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:42:48,470 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 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] [2020-10-12 09:42:48,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:42:48,471 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:42:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:42:48,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1948894811, now seen corresponding path program 19 times [2020-10-12 09:42:48,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:42:48,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461006392] [2020-10-12 09:42:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:42:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:48,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:48,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:48,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:53,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:53,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 09:42:53,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:42:53,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 09:42:53,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:42:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:42:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:42:53,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:54,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:42:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:54,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:54,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:54,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:42:54,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:42:54,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:42:54,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:54,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:42:54,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:42:54,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:42:54,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-12 09:42:54,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461006392] [2020-10-12 09:42:54,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:42:54,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:42:54,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635175133] [2020-10-12 09:42:54,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:42:54,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:42:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:42:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:42:54,041 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand 20 states. [2020-10-12 09:42:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:42:57,394 INFO L93 Difference]: Finished difference Result 222 states and 238 transitions. [2020-10-12 09:42:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:42:57,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-10-12 09:42:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:42:57,406 INFO L225 Difference]: With dead ends: 222 [2020-10-12 09:42:57,406 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 09:42:57,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:42:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 09:42:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 123. [2020-10-12 09:42:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 09:42:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2020-10-12 09:42:57,437 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 78 [2020-10-12 09:42:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:42:57,437 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2020-10-12 09:42:57,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:42:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2020-10-12 09:42:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 09:42:57,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:42:57,439 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:42:57,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:42:57,439 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:42:57,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:42:57,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1107074713, now seen corresponding path program 20 times [2020-10-12 09:42:57,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:42:57,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769509375] [2020-10-12 09:42:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:42:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:57,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:58,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:58,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:02,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:02,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 09:43:02,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:43:02,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:43:02,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:43:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:43:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:43:02,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:02,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:02,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:02,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:02,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:02,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:02,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:02,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:02,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-12 09:43:02,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769509375] [2020-10-12 09:43:02,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:02,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:43:02,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799697657] [2020-10-12 09:43:02,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:43:02,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:02,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:43:02,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:43:02,881 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand 20 states. [2020-10-12 09:43:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:04,360 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2020-10-12 09:43:04,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:43:04,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-12 09:43:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:04,365 INFO L225 Difference]: With dead ends: 181 [2020-10-12 09:43:04,365 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 09:43:04,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:43:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 09:43:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-12 09:43:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 09:43:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-12 09:43:04,385 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 80 [2020-10-12 09:43:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:04,385 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-12 09:43:04,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:43:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-12 09:43:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 09:43:04,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:04,386 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:04,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:43:04,387 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:04,387 INFO L82 PathProgramCache]: Analyzing trace with hash -842470699, now seen corresponding path program 21 times [2020-10-12 09:43:04,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:04,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532598954] [2020-10-12 09:43:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:04,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:04,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking...