/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-cav19/array_min_and_copy_shift_sum_add.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:31:05,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:31:05,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:31:05,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:31:05,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:31:05,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:31:05,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:31:05,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:31:05,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:31:05,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:31:05,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:31:05,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:31:05,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:31:05,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:31:05,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:31:05,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:31:05,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:31:05,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:31:05,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:31:05,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:31:05,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:31:05,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:31:05,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:31:05,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:31:05,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:31:05,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:31:05,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:31:05,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:31:05,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:31:05,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:31:05,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:31:05,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:31:05,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:31:05,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:31:05,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:31:05,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:31:05,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:31:05,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:31:05,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:31:05,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:31:05,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:31:05,382 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 09:31:05,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:31:05,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:31:05,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:31:05,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:31:05,410 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:31:05,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:31:05,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:31:05,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:31:05,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:31:05,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:31:05,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:31:05,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:31:05,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:31:05,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:31:05,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:31:05,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:31:05,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:31:05,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:31:05,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:31:05,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:31:05,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:31:05,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:31:05,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:31:05,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:31:05,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:31:05,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:31:05,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:31:05,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:31:05,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:31:05,415 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 09:31:05,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:31:05,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:31:05,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:31:05,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:31:05,740 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:31:05,740 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_min_and_copy_shift_sum_add.c [2020-10-12 09:31:05,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98846c51c/d992fa75f14540789db24a82bebaac72/FLAG96b8ba5a9 [2020-10-12 09:31:06,243 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:31:06,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_min_and_copy_shift_sum_add.c [2020-10-12 09:31:06,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98846c51c/d992fa75f14540789db24a82bebaac72/FLAG96b8ba5a9 [2020-10-12 09:31:06,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98846c51c/d992fa75f14540789db24a82bebaac72 [2020-10-12 09:31:06,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:31:06,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:31:06,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:31:06,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:31:06,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:31:06,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4603aae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06, skipping insertion in model container [2020-10-12 09:31:06,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:31:06,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:31:06,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:31:06,848 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:31:06,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:31:06,917 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:31:06,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06 WrapperNode [2020-10-12 09:31:06,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:31:06,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:31:06,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:31:06,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:31:07,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:07,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:07,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:07,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:07,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:07,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:07,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:07,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:31:07,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:31:07,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:31:07,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:31:07,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (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 09:31:07,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:31:07,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:31:07,131 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 09:31:07,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:31:07,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:31:07,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:31:07,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 09:31:07,132 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 09:31:07,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:31:07,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:31:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:31:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:31:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:31:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:31:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:31:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:31:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:31:07,467 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:31:07,468 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 09:31:07,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:31:07 BoogieIcfgContainer [2020-10-12 09:31:07,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:31:07,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:31:07,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:31:07,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:31:07,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:31:06" (1/3) ... [2020-10-12 09:31:07,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f70030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:31:07, skipping insertion in model container [2020-10-12 09:31:07,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (2/3) ... [2020-10-12 09:31:07,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f70030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:31:07, skipping insertion in model container [2020-10-12 09:31:07,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:31:07" (3/3) ... [2020-10-12 09:31:07,480 INFO L109 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2020-10-12 09:31:07,491 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:31:07,498 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:31:07,511 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:31:07,532 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:31:07,533 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:31:07,533 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:31:07,533 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:31:07,533 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:31:07,533 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:31:07,533 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:31:07,533 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:31:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-12 09:31:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:31:07,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:07,561 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:07,562 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:07,568 INFO L82 PathProgramCache]: Analyzing trace with hash -374325002, now seen corresponding path program 1 times [2020-10-12 09:31:07,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:07,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302526641] [2020-10-12 09:31:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:07,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:07,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:08,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:31:08,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:31:08,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-12 09:31:08,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:08,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:31:08,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:08,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:31:08,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:31:08,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:08,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:08,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:08,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:08,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:31:08,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:08,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:08,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:08,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:08,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:08,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:08,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:08,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:08,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:08,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:08,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:08,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:08,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:08,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:08,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:08,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:08,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:08,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 09:31:08,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:08,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:08,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:08,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:08,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:31:08,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302526641] [2020-10-12 09:31:08,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:31:08,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:31:08,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18908053] [2020-10-12 09:31:08,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:31:08,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:08,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:31:08,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:31:08,295 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-10-12 09:31:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:08,552 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2020-10-12 09:31:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:31:08,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 09:31:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:08,564 INFO L225 Difference]: With dead ends: 78 [2020-10-12 09:31:08,565 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 09:31:08,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:31:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 09:31:08,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 09:31:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 09:31:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-12 09:31:08,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 27 [2020-10-12 09:31:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:08,619 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-12 09:31:08,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:31:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-12 09:31:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:31:08,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:08,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:08,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:31:08,623 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:08,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1157530424, now seen corresponding path program 1 times [2020-10-12 09:31:08,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:08,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630751703] [2020-10-12 09:31:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:08,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:09,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 09:31:09,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:09,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-12 09:31:09,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:09,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:31:09,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 09:31:09,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:31:09,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:09,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:09,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:09,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:09,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:09,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:09,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:09,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:09,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:09,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:09,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:09,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:09,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:09,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:09,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:09,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:09,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:09,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:09,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:09,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:09,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:09,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:09,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:09,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:09,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:31:09,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630751703] [2020-10-12 09:31:09,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:31:09,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:31:09,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175042169] [2020-10-12 09:31:09,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:31:09,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:09,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:31:09,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:31:09,099 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2020-10-12 09:31:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:09,310 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-10-12 09:31:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:31:09,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-12 09:31:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:09,312 INFO L225 Difference]: With dead ends: 56 [2020-10-12 09:31:09,313 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 09:31:09,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:31:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 09:31:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-10-12 09:31:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 09:31:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-12 09:31:09,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2020-10-12 09:31:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:09,341 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-12 09:31:09,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:31:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-12 09:31:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:31:09,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:09,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:09,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:31:09,344 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:09,344 INFO L82 PathProgramCache]: Analyzing trace with hash -155742140, now seen corresponding path program 1 times [2020-10-12 09:31:09,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:09,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115710094] [2020-10-12 09:31:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:10,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:10,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:10,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:11,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:11,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:11,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:11,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:12,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:12,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:31:12,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 09:31:12,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2909 [2020-10-12 09:31:12,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:31:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:31:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:12,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:12,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:12,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:12,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:12,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:12,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:12,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:12,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:12,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:12,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:12,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:12,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:12,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:12,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:12,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:12,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:12,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:12,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:12,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:12,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:12,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:12,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:12,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:12,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:12,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:12,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:12,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:12,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:12,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:12,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:12,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:12,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:12,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:12,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:12,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:12,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:12,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:12,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:12,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:12,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:12,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:31:12,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115710094] [2020-10-12 09:31:12,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:12,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:31:12,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815283717] [2020-10-12 09:31:12,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:31:12,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:12,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:31:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:31:12,580 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 16 states. [2020-10-12 09:31:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:13,239 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-12 09:31:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:31:13,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-12 09:31:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:13,242 INFO L225 Difference]: With dead ends: 49 [2020-10-12 09:31:13,242 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:31:13,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:31:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:31:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 09:31:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:31:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-12 09:31:13,261 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 41 [2020-10-12 09:31:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:13,265 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-12 09:31:13,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:31:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-12 09:31:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:31:13,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:13,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:13,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:31:13,268 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1435605818, now seen corresponding path program 1 times [2020-10-12 09:31:13,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:13,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188851500] [2020-10-12 09:31:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:13,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:13,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:15,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:15,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:15,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:15,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:15,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:31:15,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 09:31:15,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2191 [2020-10-12 09:31:15,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:31:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:31:15,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:16,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:16,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:16,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:16,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:16,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:16,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:16,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:16,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:16,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:16,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:16,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:16,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:16,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:16,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:16,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 09:31:16,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:16,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:16,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:16,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:16,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:16,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:31:16,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:16,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:16,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:16,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:31:16,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:16,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:16,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:16,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:16,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 09:31:16,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:16,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:16,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:16,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:16,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:31:16,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188851500] [2020-10-12 09:31:16,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:16,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:31:16,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056808254] [2020-10-12 09:31:16,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:31:16,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:31:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:31:16,160 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 17 states. [2020-10-12 09:31:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:17,370 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-12 09:31:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:31:17,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-12 09:31:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:17,372 INFO L225 Difference]: With dead ends: 55 [2020-10-12 09:31:17,372 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 09:31:17,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:31:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 09:31:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-12 09:31:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:31:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-12 09:31:17,392 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 41 [2020-10-12 09:31:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:17,393 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-12 09:31:17,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:31:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-12 09:31:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:31:17,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:17,397 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:17,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:31:17,398 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1619425154, now seen corresponding path program 2 times [2020-10-12 09:31:17,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:17,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545445712] [2020-10-12 09:31:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:17,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:17,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:17,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:18,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:19,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:19,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:31:19,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:31:19,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-10-12 09:31:19,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:19,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:31:19,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:19,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:31:19,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:19,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:19,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:19,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:19,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:19,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:19,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:19,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:19,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:19,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:19,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:19,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:19,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:19,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:19,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:19,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:19,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:19,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:19,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:19,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:19,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:19,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:19,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:19,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:19,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:19,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:19,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:19,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:19,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:19,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:19,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:19,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:19,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:19,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:31:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:31:19,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545445712] [2020-10-12 09:31:19,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:19,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:31:19,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931320957] [2020-10-12 09:31:19,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:31:19,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:31:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:31:19,674 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 18 states. [2020-10-12 09:31:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:21,147 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-10-12 09:31:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:31:21,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-12 09:31:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:21,149 INFO L225 Difference]: With dead ends: 65 [2020-10-12 09:31:21,149 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:31:21,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:31:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:31:21,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2020-10-12 09:31:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:31:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-12 09:31:21,167 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 43 [2020-10-12 09:31:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:21,168 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-12 09:31:21,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:31:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-12 09:31:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:31:21,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:21,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:21,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:31:21,172 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1712809922, now seen corresponding path program 3 times [2020-10-12 09:31:21,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:21,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838139099] [2020-10-12 09:31:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:21,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:21,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:21,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:21,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:22,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:22,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:23,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:23,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:31:23,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:31:23,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1827 [2020-10-12 09:31:23,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:23,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:31:23,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:23,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:31:23,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:23,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:23,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:23,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:23,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:23,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:23,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:23,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:23,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:23,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:23,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:23,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:23,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:23,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:23,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:23,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:23,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:23,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:23,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:23,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:23,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:23,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:23,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:23,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:23,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:23,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:23,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:31:23,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:23,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:23,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:23,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:23,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:31:23,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838139099] [2020-10-12 09:31:23,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:23,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:31:23,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861011227] [2020-10-12 09:31:23,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:31:23,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:31:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:31:23,676 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 18 states. [2020-10-12 09:31:24,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:24,468 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-12 09:31:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:31:24,469 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-12 09:31:24,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:24,470 INFO L225 Difference]: With dead ends: 87 [2020-10-12 09:31:24,470 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 09:31:24,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:31:24,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 09:31:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-10-12 09:31:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 09:31:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-12 09:31:24,486 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 43 [2020-10-12 09:31:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:24,486 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-12 09:31:24,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:31:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-12 09:31:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:31:24,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:24,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:24,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:31:24,488 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash 31077252, now seen corresponding path program 2 times [2020-10-12 09:31:24,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:24,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476376894] [2020-10-12 09:31:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:24,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:24,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:24,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:25,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:25,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:25,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:25,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:31:25,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:31:25,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-12 09:31:25,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:31:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:31:25,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:26,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:26,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:26,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:26,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:26,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:26,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:26,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:26,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:26,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:26,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:26,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:26,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:26,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:26,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:26,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:26,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:26,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:26,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:26,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:26,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:26,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:26,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:26,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:26,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:26,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:26,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:26,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:26,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:26,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:26,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:26,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:26,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:26,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:26,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:26,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:26,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:26,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:26,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:26,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:31:26,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476376894] [2020-10-12 09:31:26,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:26,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:31:26,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886154052] [2020-10-12 09:31:26,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:31:26,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:31:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:31:26,298 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 19 states. [2020-10-12 09:31:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:27,301 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-10-12 09:31:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:31:27,302 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-12 09:31:27,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:27,303 INFO L225 Difference]: With dead ends: 77 [2020-10-12 09:31:27,303 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 09:31:27,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:31:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 09:31:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 51. [2020-10-12 09:31:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:31:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-10-12 09:31:27,321 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 43 [2020-10-12 09:31:27,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:27,323 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-10-12 09:31:27,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:31:27,323 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-10-12 09:31:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:31:27,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:27,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:27,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:31:27,329 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash 124462020, now seen corresponding path program 3 times [2020-10-12 09:31:27,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:27,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785953588] [2020-10-12 09:31:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:27,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:27,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:27,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:27,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:28,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:28,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:28,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:29,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:29,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:31:29,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:31:29,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2312 [2020-10-12 09:31:29,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:31:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:31:29,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:30,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:30,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:30,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:30,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:30,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:30,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:30,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:30,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:30,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:30,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:30,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:30,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:30,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:30,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:30,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:30,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:30,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:30,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:30,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:30,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:30,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:30,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:30,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:30,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:30,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:30,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:30,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:30,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:30,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:30,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:30,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:30,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:30,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:30,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:30,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:30,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:30,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:30,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:30,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 09:31:30,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785953588] [2020-10-12 09:31:30,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:30,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:31:30,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511008588] [2020-10-12 09:31:30,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:31:30,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:30,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:31:30,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:31:30,293 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 17 states. [2020-10-12 09:31:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:31,046 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-12 09:31:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:31:31,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-12 09:31:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:31,048 INFO L225 Difference]: With dead ends: 79 [2020-10-12 09:31:31,049 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:31:31,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:31:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:31:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-10-12 09:31:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 09:31:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2020-10-12 09:31:31,073 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 43 [2020-10-12 09:31:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:31,074 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2020-10-12 09:31:31,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:31:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2020-10-12 09:31:31,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:31:31,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:31,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:31,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:31:31,076 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:31,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1841789120, now seen corresponding path program 4 times [2020-10-12 09:31:31,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:31,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85526321] [2020-10-12 09:31:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:31,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:31,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:31,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:32,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:31:32,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:31:32,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-10-12 09:31:32,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:32,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:31:32,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 09:31:32,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:31:32,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:32,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:32,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:32,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:32,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:32,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:32,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:32,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:32,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:32,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:32,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:32,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:32,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:32,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:32,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:32,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:32,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:32,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:32,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:32,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:32,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:32,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:32,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:32,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:32,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:32,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:32,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:32,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:32,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:32,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:32,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:32,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 09:31:32,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85526321] [2020-10-12 09:31:32,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:32,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:31:32,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109513589] [2020-10-12 09:31:32,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:31:32,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:32,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:31:32,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:31:32,207 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 9 states. [2020-10-12 09:31:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:32,428 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-12 09:31:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:31:32,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-12 09:31:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:32,430 INFO L225 Difference]: With dead ends: 84 [2020-10-12 09:31:32,430 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:31:32,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 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 09:31:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:31:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-12 09:31:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 09:31:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-12 09:31:32,445 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 45 [2020-10-12 09:31:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:32,445 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-12 09:31:32,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:31:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-12 09:31:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:31:32,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:32,447 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:32,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:31:32,447 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1293146800, now seen corresponding path program 5 times [2020-10-12 09:31:32,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:32,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721372832] [2020-10-12 09:31:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:32,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:33,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:34,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:35,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:35,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:35,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:37,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:31:37,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 09:31:37,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 09:31:37,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:37,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:31:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 09:31:37,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:37,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:37,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:37,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:37,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:37,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:37,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:37,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:37,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:37,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:37,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:37,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:37,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:37,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:37,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:37,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:37,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:37,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:37,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:37,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:37,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:37,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:37,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:37,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:37,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:37,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:37,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:37,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:37,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:31:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:37,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:37,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:37,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 09:31:37,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:37,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:31:37,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721372832] [2020-10-12 09:31:37,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:37,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:31:37,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69889621] [2020-10-12 09:31:37,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:31:37,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:37,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:31:37,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:31:37,933 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 21 states. [2020-10-12 09:31:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:39,223 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-12 09:31:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:31:39,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-12 09:31:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:39,225 INFO L225 Difference]: With dead ends: 69 [2020-10-12 09:31:39,225 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:31:39,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:31:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:31:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-12 09:31:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:31:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-12 09:31:39,242 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 53 [2020-10-12 09:31:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:39,242 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-12 09:31:39,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:31:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-10-12 09:31:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:31:39,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:39,243 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:39,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:31:39,244 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:39,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:39,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1413472594, now seen corresponding path program 1 times [2020-10-12 09:31:39,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:39,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890850961] [2020-10-12 09:31:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:39,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:39,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:39,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:39,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:40,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:40,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:40,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:41,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:41,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:41,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:42,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:43,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:31:43,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 09:31:43,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3752 [2020-10-12 09:31:43,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:43,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:31:43,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:43,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 09:31:43,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:43,586 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-12 09:31:43,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:43,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:43,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:43,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:43,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:43,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:43,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:43,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:43,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:43,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:43,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:43,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:43,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:43,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:43,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:43,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:43,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:43,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:43,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:43,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:43,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:43,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:43,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:43,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:43,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:43,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:43,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:43,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:43,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:43,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:43,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:43,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:43,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:43,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:43,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:31:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:43,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:43,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:43,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:43,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:43,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:43,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:43,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:43,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:43,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:31:43,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890850961] [2020-10-12 09:31:43,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:43,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:31:43,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874775925] [2020-10-12 09:31:43,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:31:43,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:43,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:31:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:31:43,919 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 20 states. [2020-10-12 09:31:45,028 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-12 09:31:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:45,536 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2020-10-12 09:31:45,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:31:45,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-12 09:31:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:45,539 INFO L225 Difference]: With dead ends: 95 [2020-10-12 09:31:45,539 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 09:31:45,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:31:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 09:31:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-10-12 09:31:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:31:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-12 09:31:45,551 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 53 [2020-10-12 09:31:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:45,552 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-12 09:31:45,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:31:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-12 09:31:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:31:45,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:45,553 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:45,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:31:45,554 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:45,554 INFO L82 PathProgramCache]: Analyzing trace with hash 630081234, now seen corresponding path program 2 times [2020-10-12 09:31:45,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:45,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019643460] [2020-10-12 09:31:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:45,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:45,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:45,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:46,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:46,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:46,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:48,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:48,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:49,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:49,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:49,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:31:49,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 09:31:49,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3589 [2020-10-12 09:31:49,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:49,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:31:49,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:49,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 09:31:49,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:49,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:49,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:49,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:49,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:49,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:49,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:49,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:49,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:49,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:49,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:49,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:49,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:49,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:49,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:49,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:49,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:49,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:49,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:49,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:49,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:49,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:49,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:49,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:49,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:49,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:49,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:49,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:49,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:49,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:49,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:49,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:49,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:49,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:49,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:49,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:31:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:49,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:49,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:49,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:49,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:49,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:49,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:49,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:31:49,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019643460] [2020-10-12 09:31:49,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:49,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:31:49,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834419299] [2020-10-12 09:31:49,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:31:49,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:31:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:31:49,968 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 21 states. [2020-10-12 09:31:51,691 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-12 09:31:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:52,319 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2020-10-12 09:31:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:31:52,321 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-12 09:31:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:52,323 INFO L225 Difference]: With dead ends: 113 [2020-10-12 09:31:52,323 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 09:31:52,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:31:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 09:31:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2020-10-12 09:31:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:31:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2020-10-12 09:31:52,338 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 53 [2020-10-12 09:31:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:52,339 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2020-10-12 09:31:52,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:31:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2020-10-12 09:31:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:31:52,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:52,340 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:52,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:31:52,340 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:52,341 INFO L82 PathProgramCache]: Analyzing trace with hash -958266668, now seen corresponding path program 4 times [2020-10-12 09:31:52,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:52,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061721912] [2020-10-12 09:31:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:52,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:54,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:54,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:54,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:55,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:55,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:55,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:31:55,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 09:31:55,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2772 [2020-10-12 09:31:55,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:55,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:31:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:31:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 09:31:55,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:56,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:56,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:56,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:56,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:56,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:56,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:56,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:56,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:56,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:56,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:56,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:31:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:56,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:56,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:56,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:56,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:31:56,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:56,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:56,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:31:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:56,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:56,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:56,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:56,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:56,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:56,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:56,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:31:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:56,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:56,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:56,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:56,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:56,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:56,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:56,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:56,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:56,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:56,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:31:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:56,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:56,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:56,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:56,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:56,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:56,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:31:56,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061721912] [2020-10-12 09:31:56,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:56,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:31:56,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014572349] [2020-10-12 09:31:56,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:31:56,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:56,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:31:56,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:31:56,155 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand 21 states. [2020-10-12 09:31:57,328 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-12 09:31:57,462 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-12 09:31:57,844 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-12 09:31:58,021 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-12 09:31:58,208 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-12 09:31:58,359 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-12 09:31:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:58,831 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2020-10-12 09:31:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:31:58,831 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-12 09:31:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:58,833 INFO L225 Difference]: With dead ends: 112 [2020-10-12 09:31:58,833 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 09:31:58,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:31:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 09:31:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2020-10-12 09:31:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:31:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-12 09:31:58,844 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 53 [2020-10-12 09:31:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:58,844 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-12 09:31:58,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:31:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-12 09:31:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:31:58,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:58,845 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:58,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:31:58,846 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:58,846 INFO L82 PathProgramCache]: Analyzing trace with hash -504759922, now seen corresponding path program 6 times [2020-10-12 09:31:58,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:58,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428556299] [2020-10-12 09:31:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:58,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:59,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:59,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:59,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:59,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:01,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:01,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:01,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:01,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:01,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:01,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:01,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:01,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:01,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:32:01,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 09:32:01,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2801 [2020-10-12 09:32:01,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:32:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:32:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 09:32:01,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:02,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:02,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:02,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:02,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:02,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:02,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:32:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:02,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:02,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:02,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:02,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:32:02,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:02,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:02,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:02,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:32:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:02,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:02,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:02,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:02,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:02,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:02,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:02,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:02,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:02,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:02,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:32:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:02,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:02,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:02,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:02,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:02,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:02,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:02,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:02,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:02,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:02,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:02,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:02,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428556299] [2020-10-12 09:32:02,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:02,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:32:02,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466682840] [2020-10-12 09:32:02,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:32:02,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:32:02,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:32:02,867 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 23 states. [2020-10-12 09:32:04,004 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-12 09:32:04,710 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-12 09:32:04,959 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-12 09:32:05,662 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-12 09:32:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:05,939 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2020-10-12 09:32:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:32:05,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-12 09:32:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:05,945 INFO L225 Difference]: With dead ends: 101 [2020-10-12 09:32:05,945 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:32:05,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=412, Invalid=1844, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:32:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:32:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-12 09:32:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 09:32:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2020-10-12 09:32:05,966 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 55 [2020-10-12 09:32:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:05,967 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2020-10-12 09:32:05,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:32:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2020-10-12 09:32:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:32:05,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:05,969 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:05,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:32:05,969 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2101263632, now seen corresponding path program 3 times [2020-10-12 09:32:05,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:05,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534047198] [2020-10-12 09:32:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:05,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:06,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:06,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:06,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:06,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:07,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:07,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:07,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:07,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:08,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:08,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:08,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:08,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:08,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:08,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:08,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:08,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:32:08,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 09:32:08,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2648 [2020-10-12 09:32:08,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:08,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:32:08,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:32:08,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 09:32:08,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:09,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:09,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:09,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:09,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:09,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:09,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:09,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:09,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:09,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:32:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:09,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:09,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:09,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:09,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:09,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:09,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:09,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:32:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:09,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:09,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:09,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:09,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:09,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:09,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:09,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:09,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:09,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:09,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:32:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:09,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:09,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:09,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:09,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:09,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:09,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:09,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:09,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:09,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:09,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:09,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:09,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:09,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:09,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534047198] [2020-10-12 09:32:09,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:09,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:32:09,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759268154] [2020-10-12 09:32:09,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:32:09,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:09,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:32:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:32:09,904 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand 23 states. [2020-10-12 09:32:11,821 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2020-10-12 09:32:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:12,654 INFO L93 Difference]: Finished difference Result 119 states and 151 transitions. [2020-10-12 09:32:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:32:12,655 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-12 09:32:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:12,656 INFO L225 Difference]: With dead ends: 119 [2020-10-12 09:32:12,656 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 09:32:12,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:32:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 09:32:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2020-10-12 09:32:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 09:32:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2020-10-12 09:32:12,678 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 55 [2020-10-12 09:32:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:12,678 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2020-10-12 09:32:12,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:32:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2020-10-12 09:32:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:32:12,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:12,680 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:12,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:32:12,680 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash 881443472, now seen corresponding path program 4 times [2020-10-12 09:32:12,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:12,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826442053] [2020-10-12 09:32:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:12,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:13,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:13,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:13,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:13,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:13,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:13,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:13,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:14,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:14,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:14,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:15,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:32:15,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 09:32:15,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2743 [2020-10-12 09:32:15,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:15,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:32:15,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:32:15,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 09:32:15,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:16,118 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-12 09:32:16,254 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-12 09:32:16,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:16,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:16,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:16,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:16,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:16,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:16,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:16,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:16,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:32:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:16,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:16,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:16,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:16,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:16,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:32:16,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:16,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:16,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:16,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:16,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:16,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:32:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:16,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:16,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:16,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:16,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:16,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:16,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:16,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:16,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:32:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:16,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:16,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:16,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:16,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:16,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:16,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:16,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:16,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:16,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:16,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:16,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:16,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:16,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:16,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:16,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:16,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826442053] [2020-10-12 09:32:16,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:16,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:32:16,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425924093] [2020-10-12 09:32:16,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:32:16,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:32:16,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:32:16,737 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand 25 states. [2020-10-12 09:32:17,830 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-12 09:32:18,315 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2020-10-12 09:32:18,609 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-12 09:32:18,861 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-12 09:32:19,025 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-12 09:32:19,290 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2020-10-12 09:32:20,292 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-12 09:32:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:20,305 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2020-10-12 09:32:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:32:20,306 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-12 09:32:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:20,307 INFO L225 Difference]: With dead ends: 141 [2020-10-12 09:32:20,307 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 09:32:20,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=442, Invalid=2980, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:32:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 09:32:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2020-10-12 09:32:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 09:32:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2020-10-12 09:32:20,327 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 55 [2020-10-12 09:32:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:20,327 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2020-10-12 09:32:20,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:32:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2020-10-12 09:32:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:32:20,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:20,328 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:20,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:32:20,328 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash -807500270, now seen corresponding path program 5 times [2020-10-12 09:32:20,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:20,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166610978] [2020-10-12 09:32:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:20,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:20,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:22,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:22,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:23,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:23,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:23,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:23,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:23,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:32:23,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 09:32:23,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2956 [2020-10-12 09:32:23,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:23,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:32:23,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:32:23,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 09:32:23,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:24,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:24,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:24,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:24,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:24,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:24,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:32:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:24,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:24,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:24,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:24,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:24,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:24,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:24,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:24,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:32:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:24,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:24,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:24,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:24,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:24,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:24,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:24,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:32:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:24,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:24,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:24,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:24,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:24,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:24,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:24,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:24,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:24,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:24,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:24,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:24,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:24,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:24,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:24,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:24,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:24,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:24,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166610978] [2020-10-12 09:32:24,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:24,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:32:24,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062083999] [2020-10-12 09:32:24,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:32:24,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:24,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:32:24,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:32:24,454 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand 25 states. [2020-10-12 09:32:25,796 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-12 09:32:26,394 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-12 09:32:26,588 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-12 09:32:26,735 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-12 09:32:26,984 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-12 09:32:27,375 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-12 09:32:28,400 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-12 09:32:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:28,543 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2020-10-12 09:32:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 09:32:28,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-12 09:32:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:28,545 INFO L225 Difference]: With dead ends: 146 [2020-10-12 09:32:28,545 INFO L226 Difference]: Without dead ends: 141 [2020-10-12 09:32:28,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=497, Invalid=3285, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 09:32:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-12 09:32:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 108. [2020-10-12 09:32:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 09:32:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2020-10-12 09:32:28,563 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 55 [2020-10-12 09:32:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:28,563 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2020-10-12 09:32:28,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:32:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2020-10-12 09:32:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 09:32:28,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:28,564 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:28,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:32:28,564 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1220785740, now seen corresponding path program 7 times [2020-10-12 09:32:28,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:28,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201134636] [2020-10-12 09:32:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:28,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:28,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:29,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:29,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:29,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:29,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:29,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:30,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:31,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:31,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:31,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:32:31,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 09:32:31,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2841 [2020-10-12 09:32:31,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:31,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:32:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:32:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 09:32:31,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:32:32,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:32,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:32,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:32,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:32,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:32,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:32,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:32,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:32,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:32,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:32:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:32,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:32,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:32,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:32,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:32,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:32,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:32,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:32,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:32:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:32,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:32,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:32,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:32,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:32,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:32,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:32,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:32,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:32,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:32:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:32,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:32,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:32,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:32,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:32,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:32,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:32,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:32,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:32,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:32,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:32,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:32,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:32,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:32,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:32,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:32,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:32,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:32,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:32,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:32,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201134636] [2020-10-12 09:32:32,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:32,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:32:32,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73333724] [2020-10-12 09:32:32,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:32:32,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:32:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:32:32,890 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand 26 states. [2020-10-12 09:32:33,798 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-12 09:32:34,566 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2020-10-12 09:32:34,770 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-10-12 09:32:35,007 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-12 09:32:35,460 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-12 09:32:35,812 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2020-10-12 09:32:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:36,124 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2020-10-12 09:32:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:32:36,124 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-12 09:32:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:36,126 INFO L225 Difference]: With dead ends: 141 [2020-10-12 09:32:36,126 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 09:32:36,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:32:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 09:32:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2020-10-12 09:32:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-12 09:32:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2020-10-12 09:32:36,143 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 57 [2020-10-12 09:32:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:36,143 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2020-10-12 09:32:36,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:32:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2020-10-12 09:32:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 09:32:36,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:36,144 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:36,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:32:36,144 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1922385614, now seen corresponding path program 5 times [2020-10-12 09:32:36,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:36,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452245223] [2020-10-12 09:32:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:36,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:37,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:37,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:37,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:38,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:38,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:38,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:38,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:32:38,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 09:32:38,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2687 [2020-10-12 09:32:38,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:38,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:32:38,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:32:38,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 09:32:38,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:39,889 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-12 09:32:40,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:40,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:40,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:40,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:40,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:40,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:40,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:40,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:40,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:40,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:40,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:40,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:32:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:40,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:40,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:40,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:40,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:40,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:40,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:40,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:40,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:32:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:40,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:40,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:40,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:40,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:40,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:40,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:40,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:40,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:40,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:40,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:40,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:32:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:40,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:40,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:40,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:40,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:40,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:40,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:40,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:40,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:40,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:40,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:40,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:40,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:40,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:40,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:40,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452245223] [2020-10-12 09:32:40,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:40,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:32:40,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992178416] [2020-10-12 09:32:40,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:32:40,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:32:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:32:40,657 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand 26 states. [2020-10-12 09:32:42,588 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-12 09:32:42,893 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-12 09:32:43,211 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-12 09:32:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:44,235 INFO L93 Difference]: Finished difference Result 172 states and 212 transitions. [2020-10-12 09:32:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:32:44,237 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-12 09:32:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:44,239 INFO L225 Difference]: With dead ends: 172 [2020-10-12 09:32:44,239 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 09:32:44,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 09:32:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 09:32:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2020-10-12 09:32:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-12 09:32:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2020-10-12 09:32:44,265 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 57 [2020-10-12 09:32:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:44,266 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2020-10-12 09:32:44,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:32:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2020-10-12 09:32:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 09:32:44,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:44,267 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:44,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:32:44,267 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1949879856, now seen corresponding path program 6 times [2020-10-12 09:32:44,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:44,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248516090] [2020-10-12 09:32:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:44,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:44,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:44,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:44,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:46,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:32:46,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 09:32:46,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-12 09:32:46,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:32:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:32:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 09:32:46,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:48,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:48,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:48,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:48,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:48,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:48,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:48,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:48,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:48,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:32:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:48,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:48,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:48,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:48,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:48,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:32:48,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:48,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:48,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:48,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:48,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:48,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:32:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:48,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:48,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:48,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:48,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:48,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:32:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:48,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:48,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:48,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:48,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:48,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:48,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:48,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:48,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:48,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:48,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:48,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:48,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:48,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:48,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:48,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:48,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248516090] [2020-10-12 09:32:48,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:48,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:32:48,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073971248] [2020-10-12 09:32:48,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:32:48,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:32:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:32:48,406 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand 26 states. [2020-10-12 09:32:48,902 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-12 09:32:49,182 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-12 09:32:49,387 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-12 09:32:50,664 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-12 09:32:50,838 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-12 09:32:51,181 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-12 09:32:52,023 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-12 09:32:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:52,511 INFO L93 Difference]: Finished difference Result 167 states and 204 transitions. [2020-10-12 09:32:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:32:52,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-12 09:32:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:52,514 INFO L225 Difference]: With dead ends: 167 [2020-10-12 09:32:52,514 INFO L226 Difference]: Without dead ends: 161 [2020-10-12 09:32:52,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=426, Invalid=2544, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:32:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-12 09:32:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 102. [2020-10-12 09:32:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 09:32:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-10-12 09:32:52,535 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 57 [2020-10-12 09:32:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:52,535 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-10-12 09:32:52,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:32:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-10-12 09:32:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:32:52,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:52,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:52,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:32:52,536 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:52,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1612790666, now seen corresponding path program 8 times [2020-10-12 09:32:52,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:52,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262574723] [2020-10-12 09:32:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:52,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:52,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:53,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:53,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:54,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:54,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:55,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:55,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:55,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:32:55,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:32:55,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2723 [2020-10-12 09:32:55,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:32:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:32:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:32:55,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:56,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:56,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:56,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:56,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:56,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:56,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:56,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:32:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:56,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:56,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:56,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:56,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:56,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:32:56,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:56,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:56,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:32:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:56,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:56,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:56,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:56,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:56,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:56,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:56,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:56,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:32:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:56,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:56,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:56,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:56,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:56,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:56,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:56,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:56,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:56,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:56,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:56,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:56,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:56,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:56,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:56,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:56,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:56,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:56,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:56,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:56,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:57,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262574723] [2020-10-12 09:32:57,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:57,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:32:57,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482200507] [2020-10-12 09:32:57,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:32:57,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:57,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:32:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:32:57,009 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 28 states. [2020-10-12 09:32:58,072 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-12 09:32:58,322 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-12 09:32:58,794 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-12 09:32:58,997 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-12 09:32:59,646 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-12 09:33:00,536 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-12 09:33:00,718 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2020-10-12 09:33:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:01,169 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2020-10-12 09:33:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 09:33:01,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-10-12 09:33:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:01,172 INFO L225 Difference]: With dead ends: 174 [2020-10-12 09:33:01,173 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 09:33:01,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=588, Invalid=2952, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:33:01,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 09:33:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-12 09:33:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 09:33:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2020-10-12 09:33:01,202 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 59 [2020-10-12 09:33:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:01,202 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2020-10-12 09:33:01,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:33:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2020-10-12 09:33:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:33:01,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:01,203 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:01,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:33:01,204 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:01,204 INFO L82 PathProgramCache]: Analyzing trace with hash -192647668, now seen corresponding path program 6 times [2020-10-12 09:33:01,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:01,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230329048] [2020-10-12 09:33:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:01,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:01,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:01,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:01,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:01,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:01,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:02,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:03,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:03,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:03,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:33:03,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:33:03,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1962 [2020-10-12 09:33:03,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:33:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:33:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:33:03,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:04,753 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-12 09:33:05,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:05,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:05,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:05,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:05,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:05,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:05,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:05,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:05,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:33:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:05,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:05,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:05,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:05,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:05,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:05,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:33:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:05,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:05,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:05,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:05,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:05,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:05,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:05,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:05,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:05,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:05,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:33:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:05,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:05,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:05,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:05,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:05,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:05,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:05,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:33:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:05,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:05,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:05,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:05,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:05,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:05,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:05,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:33:05,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230329048] [2020-10-12 09:33:05,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:05,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:33:05,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91526707] [2020-10-12 09:33:05,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:33:05,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:33:05,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:33:05,199 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand 28 states. [2020-10-12 09:33:06,676 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-12 09:33:06,997 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-12 09:33:07,193 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-10-12 09:33:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:07,939 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2020-10-12 09:33:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:33:07,940 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-10-12 09:33:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:07,943 INFO L225 Difference]: With dead ends: 161 [2020-10-12 09:33:07,943 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 09:33:07,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=336, Invalid=2114, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:33:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 09:33:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 127. [2020-10-12 09:33:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 09:33:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2020-10-12 09:33:08,001 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 59 [2020-10-12 09:33:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:08,005 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2020-10-12 09:33:08,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:33:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2020-10-12 09:33:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:33:08,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:08,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:08,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:33:08,016 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:08,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1540404108, now seen corresponding path program 7 times [2020-10-12 09:33:08,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:08,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650828779] [2020-10-12 09:33:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:08,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:08,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:08,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:08,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:08,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:09,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:09,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:09,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:10,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:10,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:33:10,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:33:10,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-12 09:33:10,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:33:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:33:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:33:10,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:12,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:12,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:12,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:12,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:12,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:12,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:12,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:12,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:33:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:12,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:12,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:12,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:12,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:12,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:12,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:12,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:12,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:12,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:33:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:12,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:12,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:12,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:12,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:12,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:12,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:12,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:33:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:12,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:12,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:12,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:12,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:12,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:12,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:12,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:33:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:12,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:12,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:12,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:12,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:12,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:12,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:12,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:12,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:12,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:33:12,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650828779] [2020-10-12 09:33:12,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:12,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:33:12,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540363153] [2020-10-12 09:33:12,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:33:12,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:33:12,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:33:12,084 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand 28 states. [2020-10-12 09:33:13,547 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 09:33:14,154 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 09:33:14,371 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-12 09:33:14,774 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-12 09:33:15,647 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-12 09:33:15,862 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-12 09:33:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:16,450 INFO L93 Difference]: Finished difference Result 188 states and 232 transitions. [2020-10-12 09:33:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:33:16,451 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-10-12 09:33:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:16,453 INFO L225 Difference]: With dead ends: 188 [2020-10-12 09:33:16,453 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 09:33:16,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=510, Invalid=3396, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 09:33:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 09:33:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 125. [2020-10-12 09:33:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 09:33:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2020-10-12 09:33:16,494 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 59 [2020-10-12 09:33:16,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:16,495 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2020-10-12 09:33:16,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:33:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2020-10-12 09:33:16,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:33:16,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:16,500 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1] [2020-10-12 09:33:16,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:33:16,501 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1391428556, now seen corresponding path program 8 times [2020-10-12 09:33:16,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:16,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658942638] [2020-10-12 09:33:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:16,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:16,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:17,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:17,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:18,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:19,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:19,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:33:19,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:33:19,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2825 [2020-10-12 09:33:19,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:33:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:33:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:33:19,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:21,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:21,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:21,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:21,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:21,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:21,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:21,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:21,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:21,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:21,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:21,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:21,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:33:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:21,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:21,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:21,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:21,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:21,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:21,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:21,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:21,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:33:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:21,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:21,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:21,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:21,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:21,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:21,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:21,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:21,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:33:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:21,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:21,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:21,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:21,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:21,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:21,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:21,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:21,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:33:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:21,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:21,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:21,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:21,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:21,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:21,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:21,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:21,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:21,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:21,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:33:21,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658942638] [2020-10-12 09:33:21,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:21,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:33:21,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603854674] [2020-10-12 09:33:21,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:33:21,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:21,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:33:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:33:21,181 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand 28 states. [2020-10-12 09:33:22,403 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-12 09:33:23,424 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-12 09:33:23,613 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-12 09:33:23,905 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-12 09:33:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:25,140 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-10-12 09:33:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:33:25,143 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-10-12 09:33:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:25,145 INFO L225 Difference]: With dead ends: 184 [2020-10-12 09:33:25,145 INFO L226 Difference]: Without dead ends: 179 [2020-10-12 09:33:25,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=462, Invalid=3078, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:33:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-12 09:33:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 125. [2020-10-12 09:33:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 09:33:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2020-10-12 09:33:25,178 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 59 [2020-10-12 09:33:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:25,179 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2020-10-12 09:33:25,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:33:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2020-10-12 09:33:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:33:25,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:25,180 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:25,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:33:25,180 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash -265034226, now seen corresponding path program 7 times [2020-10-12 09:33:25,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:25,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048392313] [2020-10-12 09:33:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:25,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:25,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:25,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:25,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:26,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:26,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:26,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:27,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:27,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:27,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:33:27,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:33:27,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2210 [2020-10-12 09:33:27,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:33:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:33:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:33:27,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:29,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:29,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:29,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:29,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:29,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:29,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:29,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:29,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:29,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:29,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:29,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:33:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:29,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:29,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:29,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:29,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:29,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:29,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:29,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:29,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:29,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:29,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:29,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:33:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:29,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:29,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:29,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:29,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:29,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:29,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:29,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:29,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:29,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:29,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:29,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:33:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:29,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:29,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:29,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:29,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:29,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:29,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:29,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:29,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:29,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:33:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:29,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:29,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:33:29,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048392313] [2020-10-12 09:33:29,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:29,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:33:29,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701366958] [2020-10-12 09:33:29,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:33:29,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:29,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:33:29,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:33:29,365 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand 28 states. [2020-10-12 09:33:31,068 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 09:33:31,655 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-12 09:33:31,860 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 09:33:32,294 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-12 09:33:33,204 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-12 09:33:33,430 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 09:33:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:34,059 INFO L93 Difference]: Finished difference Result 181 states and 223 transitions. [2020-10-12 09:33:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:33:34,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-10-12 09:33:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:34,062 INFO L225 Difference]: With dead ends: 181 [2020-10-12 09:33:34,062 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 09:33:34,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=485, Invalid=3175, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 09:33:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 09:33:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 113. [2020-10-12 09:33:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 09:33:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2020-10-12 09:33:34,090 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 59 [2020-10-12 09:33:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:34,091 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2020-10-12 09:33:34,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:33:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2020-10-12 09:33:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:33:34,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:34,092 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:34,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:33:34,092 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash -414009778, now seen corresponding path program 8 times [2020-10-12 09:33:34,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:34,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810875190] [2020-10-12 09:33:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:34,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:34,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:34,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:34,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:34,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:36,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:36,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:36,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:37,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:37,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:33:37,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:33:37,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3148 [2020-10-12 09:33:37,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:33:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:33:37,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:33:37,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:39,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:39,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:39,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:39,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:33:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:39,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:39,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:39,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:39,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:33:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:39,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:39,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:39,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:39,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:33:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:39,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:39,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:39,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:33:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:39,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:39,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:39,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:33:39,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810875190] [2020-10-12 09:33:39,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:39,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:33:39,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043615637] [2020-10-12 09:33:39,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:33:39,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:33:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:33:39,184 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand 28 states. [2020-10-12 09:33:41,219 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-12 09:33:41,397 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-10-12 09:33:41,586 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-12 09:33:42,192 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 09:33:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:43,044 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2020-10-12 09:33:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:33:43,045 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-10-12 09:33:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:43,047 INFO L225 Difference]: With dead ends: 166 [2020-10-12 09:33:43,047 INFO L226 Difference]: Without dead ends: 161 [2020-10-12 09:33:43,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=370, Invalid=2822, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 09:33:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-12 09:33:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2020-10-12 09:33:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 09:33:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2020-10-12 09:33:43,085 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 59 [2020-10-12 09:33:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:43,085 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2020-10-12 09:33:43,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:33:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2020-10-12 09:33:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:33:43,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:43,086 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:43,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:33:43,087 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:43,087 INFO L82 PathProgramCache]: Analyzing trace with hash 372402504, now seen corresponding path program 9 times [2020-10-12 09:33:43,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:43,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821129980] [2020-10-12 09:33:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:43,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:43,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:43,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:43,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:45,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:45,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 09:33:45,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:33:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2443 [2020-10-12 09:33:45,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:33:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 09:33:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:33:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:45,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:45,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:45,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:45,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:45,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:45,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:45,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:45,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:45,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:45,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:45,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:33:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:45,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:45,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:45,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:45,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:45,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:45,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:33:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:45,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:45,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:45,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:45,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:45,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:45,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:45,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:33:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:45,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:45,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:45,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:45,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:45,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:45,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:45,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:33:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:45,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:45,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:45,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:45,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:45,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 09:33:45,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821129980] [2020-10-12 09:33:45,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:45,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:33:45,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859784656] [2020-10-12 09:33:45,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:33:45,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:45,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:33:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:33:45,665 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand 12 states. [2020-10-12 09:33:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:46,088 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2020-10-12 09:33:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:33:46,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-12 09:33:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:46,091 INFO L225 Difference]: With dead ends: 164 [2020-10-12 09:33:46,091 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 09:33:46,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:33:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 09:33:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 107. [2020-10-12 09:33:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 09:33:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 137 transitions. [2020-10-12 09:33:46,115 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 137 transitions. Word has length 61 [2020-10-12 09:33:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:46,115 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 137 transitions. [2020-10-12 09:33:46,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:33:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 137 transitions. [2020-10-12 09:33:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 09:33:46,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:46,116 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:46,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:33:46,116 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash 384271712, now seen corresponding path program 9 times [2020-10-12 09:33:46,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:46,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964096975] [2020-10-12 09:33:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:46,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:47,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:47,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:47,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:47,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:49,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:49,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:49,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:50,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:50,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:50,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:50,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:50,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:51,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:51,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 09:33:51,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 09:33:51,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:33:51,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:51,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:33:51,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:33:51,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 09:33:51,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:52,092 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-12 09:33:52,251 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-12 09:33:52,425 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-12 09:33:52,606 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-12 09:33:52,786 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-12 09:33:52,941 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-12 09:33:53,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:53,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:53,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:53,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:53,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:53,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:53,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:53,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:53,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:53,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:33:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:53,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:53,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:53,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:53,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:53,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:53,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:53,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:53,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:33:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:53,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:53,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:53,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:53,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:53,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:53,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:53,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:53,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:33:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:53,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:53,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:53,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:53,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:53,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:53,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:33:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:53,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:53,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:53,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:53,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:53,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:53,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:53,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 09:33:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:53,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:53,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:53,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:53,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:53,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:53,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:53,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:53,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:53,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-12 09:33:53,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964096975] [2020-10-12 09:33:53,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:53,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:33:53,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191072514] [2020-10-12 09:33:53,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:33:53,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:33:53,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:33:53,326 INFO L87 Difference]: Start difference. First operand 107 states and 137 transitions. Second operand 24 states. [2020-10-12 09:33:55,063 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-12 09:33:55,231 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-12 09:33:55,422 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-12 09:33:55,633 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-12 09:33:55,917 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-12 09:33:56,200 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2020-10-12 09:33:56,488 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2020-10-12 09:33:56,761 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 73 [2020-10-12 09:33:57,021 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-12 09:33:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:57,355 INFO L93 Difference]: Finished difference Result 144 states and 184 transitions. [2020-10-12 09:33:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:33:57,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-10-12 09:33:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:57,357 INFO L225 Difference]: With dead ends: 144 [2020-10-12 09:33:57,358 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 09:33:57,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:33:57,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 09:33:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 128. [2020-10-12 09:33:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 09:33:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 164 transitions. [2020-10-12 09:33:57,383 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 164 transitions. Word has length 63 [2020-10-12 09:33:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:57,384 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 164 transitions. [2020-10-12 09:33:57,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:33:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 164 transitions. [2020-10-12 09:33:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 09:33:57,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:57,384 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:57,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:33:57,385 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1043803234, now seen corresponding path program 10 times [2020-10-12 09:33:57,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:57,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575266393] [2020-10-12 09:33:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:57,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:57,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:57,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:57,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:57,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:57,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:59,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:00,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:00,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:01,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:01,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:01,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:01,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:01,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:02,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:02,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 09:34:02,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 09:34:02,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:34:02,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:02,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:34:02,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:34:02,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 09:34:02,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:03,052 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-12 09:34:03,219 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-12 09:34:03,561 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-12 09:34:03,924 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-10-12 09:34:04,439 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-10-12 09:34:04,820 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-10-12 09:34:05,111 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 44 [2020-10-12 09:34:05,392 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-10-12 09:34:06,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:34:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:06,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:06,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:34:06,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:06,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:06,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:06,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:06,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:06,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:06,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:06,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:34:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:06,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:06,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:06,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:06,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:06,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:34:06,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:06,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:06,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:34:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:06,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:06,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:06,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:06,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:06,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:06,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:06,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:06,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:06,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:06,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:06,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:34:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:06,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:06,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:06,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:06,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:34:06,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:06,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:06,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:34:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:06,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:06,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:06,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:06,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:06,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:34:06,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:06,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:06,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:06,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:06,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:06,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 09:34:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:06,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:06,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:06,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:06,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:06,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:34:06,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:06,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-12 09:34:06,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575266393] [2020-10-12 09:34:06,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:34:06,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:34:06,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982250496] [2020-10-12 09:34:06,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:34:06,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:34:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:34:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:34:06,231 INFO L87 Difference]: Start difference. First operand 128 states and 164 transitions. Second operand 25 states. [2020-10-12 09:34:07,530 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-12 09:34:07,811 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-12 09:34:08,279 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2020-10-12 09:34:08,678 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2020-10-12 09:34:09,206 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-12 09:34:09,454 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-12 09:34:09,795 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-12 09:34:10,007 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-12 09:34:10,196 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-12 09:34:10,399 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-10-12 09:34:10,590 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-12 09:34:10,778 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2020-10-12 09:34:11,204 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-12 09:34:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:34:11,567 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2020-10-12 09:34:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:34:11,568 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-12 09:34:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:34:11,569 INFO L225 Difference]: With dead ends: 179 [2020-10-12 09:34:11,569 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 09:34:11,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=416, Invalid=2034, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:34:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 09:34:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 126. [2020-10-12 09:34:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 09:34:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2020-10-12 09:34:11,600 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 63 [2020-10-12 09:34:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:34:11,600 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2020-10-12 09:34:11,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:34:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2020-10-12 09:34:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:34:11,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:34:11,602 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:34:11,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:34:11,602 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:34:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:34:11,602 INFO L82 PathProgramCache]: Analyzing trace with hash 881694110, now seen corresponding path program 11 times [2020-10-12 09:34:11,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:34:11,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335200760] [2020-10-12 09:34:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:34:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:11,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:11,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:12,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:12,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:12,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:12,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:13,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:13,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:13,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:13,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:14,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:14,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:15,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:15,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:15,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:16,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:16,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:16,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:16,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:34:16,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 09:34:16,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:34:16,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:34:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:34:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 09:34:16,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:17,221 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-12 09:34:17,381 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-12 09:34:17,551 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-12 09:34:17,718 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-12 09:34:17,918 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-12 09:34:18,098 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-12 09:34:18,332 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-12 09:34:18,588 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-12 09:34:18,793 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-12 09:34:19,021 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-12 09:34:19,182 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-12 09:34:19,452 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-12 09:34:20,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:34:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:20,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:20,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:20,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:34:20,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:20,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:20,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:20,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:20,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:34:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:20,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:20,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:20,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:20,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:20,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:20,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:20,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:20,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:20,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:20,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:34:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:20,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:20,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:20,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:20,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:20,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:20,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:20,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:20,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:34:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:20,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:20,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:20,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:20,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:20,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:34:20,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:20,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:20,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:20,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:20,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:20,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:34:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:20,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:20,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:20,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:20,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:34:20,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:20,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:20,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 09:34:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:20,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:20,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:20,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:20,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:20,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:34:20,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:20,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:20,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:20,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:20,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-12 09:34:20,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335200760] [2020-10-12 09:34:20,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:34:20,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:34:20,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889467081] [2020-10-12 09:34:20,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:34:20,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:34:20,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:34:20,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:34:20,086 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand 26 states. [2020-10-12 09:34:21,290 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-12 09:34:21,774 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-12 09:34:22,005 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-12 09:34:22,442 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-12 09:34:22,621 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 09:34:22,983 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-12 09:34:23,424 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-12 09:34:24,601 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 121 [2020-10-12 09:34:25,034 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-12 09:34:25,772 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 98 [2020-10-12 09:34:26,668 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 110 [2020-10-12 09:34:27,412 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 92 [2020-10-12 09:34:28,191 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 102 [2020-10-12 09:34:28,872 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2020-10-12 09:34:29,769 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 111 [2020-10-12 09:34:30,411 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 100 [2020-10-12 09:34:30,635 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-12 09:34:30,824 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-12 09:34:31,372 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 09:34:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:34:31,779 INFO L93 Difference]: Finished difference Result 166 states and 211 transitions. [2020-10-12 09:34:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:34:31,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 65 [2020-10-12 09:34:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:34:31,783 INFO L225 Difference]: With dead ends: 166 [2020-10-12 09:34:31,783 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 09:34:31,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=492, Invalid=2930, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:34:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 09:34:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 132. [2020-10-12 09:34:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-12 09:34:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 171 transitions. [2020-10-12 09:34:31,812 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 171 transitions. Word has length 65 [2020-10-12 09:34:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:34:31,812 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 171 transitions. [2020-10-12 09:34:31,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:34:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 171 transitions. [2020-10-12 09:34:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:34:31,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:34:31,813 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:34:31,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:34:31,814 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:34:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:34:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1933685024, now seen corresponding path program 12 times [2020-10-12 09:34:31,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:34:31,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620609267] [2020-10-12 09:34:31,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:34:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:31,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:31,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:31,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:32,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:32,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:32,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:33,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:33,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:33,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:34,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:34,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:35,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:35,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:35,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:35,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:36,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:36,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:36,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:36,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:36,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:36,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:36,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:34:36,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 09:34:36,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:34:36,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:34:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:34:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 09:34:36,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:38,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:34:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:38,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:38,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:34:38,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:38,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:38,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:38,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:38,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:38,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:38,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:38,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 09:34:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:38,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:38,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:38,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:38,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:38,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:38,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:38,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:38,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:38,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:38,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 09:34:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:38,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:38,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:38,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:38,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:38,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:38,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:38,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:38,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:38,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:38,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:34:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:38,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:38,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:38,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:34:38,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:38,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:38,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:38,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:34:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:38,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:38,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:38,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 09:34:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:38,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:38,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:38,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:38,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:38,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:38,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:38,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:38,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-12 09:34:38,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620609267] [2020-10-12 09:34:38,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:34:38,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:34:38,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585852046] [2020-10-12 09:34:38,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:34:38,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:34:38,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:34:38,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:34:38,059 INFO L87 Difference]: Start difference. First operand 132 states and 171 transitions. Second operand 24 states. [2020-10-12 09:34:40,046 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-12 09:34:40,475 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-12 09:34:40,697 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-12 09:34:40,928 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-12 09:34:41,180 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-12 09:34:41,377 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-12 09:34:41,549 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-12 09:34:41,748 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-12 09:34:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:34:42,310 INFO L93 Difference]: Finished difference Result 196 states and 256 transitions. [2020-10-12 09:34:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:34:42,313 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-10-12 09:34:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:34:42,314 INFO L225 Difference]: With dead ends: 196 [2020-10-12 09:34:42,314 INFO L226 Difference]: Without dead ends: 191 [2020-10-12 09:34:42,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=328, Invalid=2122, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:34:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-12 09:34:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2020-10-12 09:34:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-12 09:34:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 191 transitions. [2020-10-12 09:34:42,352 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 191 transitions. Word has length 65 [2020-10-12 09:34:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:34:42,353 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 191 transitions. [2020-10-12 09:34:42,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:34:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 191 transitions. [2020-10-12 09:34:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:34:42,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:34:42,354 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:34:42,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:34:42,354 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:34:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:34:42,355 INFO L82 PathProgramCache]: Analyzing trace with hash -963673056, now seen corresponding path program 13 times [2020-10-12 09:34:42,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:34:42,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346258638] [2020-10-12 09:34:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:34:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:42,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:42,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:42,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:42,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:42,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:42,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:43,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:43,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:45,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:45,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:45,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:46,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:46,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:46,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:46,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:47,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:47,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:34:47,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 09:34:47,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:34:47,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:34:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:34:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 09:34:47,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:47,758 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-12 09:34:47,932 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-12 09:34:48,098 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-12 09:34:48,327 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-12 09:34:48,562 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-12 09:34:48,785 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61