/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-examples/standard_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:54:58,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:54:58,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:54:58,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:54:58,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:54:58,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:54:58,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:54:58,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:54:58,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:54:58,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:54:58,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:54:58,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:54:58,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:54:58,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:54:58,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:54:58,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:54:58,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:54:58,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:54:58,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:54:58,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:54:58,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:54:58,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:54:58,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:54:58,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:54:58,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:54:58,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:54:58,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:54:58,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:54:58,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:54:58,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:54:58,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:54:58,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:54:58,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:54:58,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:54:58,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:54:58,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:54:58,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:54:58,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:54:58,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:54:58,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:54:58,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:54:58,382 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 09:54:58,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:54:58,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:54:58,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:54:58,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:54:58,434 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:54:58,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:54:58,434 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:54:58,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:54:58,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:54:58,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:54:58,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:54:58,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:54:58,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:54:58,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:54:58,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:54:58,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:54:58,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:54:58,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:54:58,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:54:58,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:54:58,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:54:58,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:54:58,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:54:58,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:54:58,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:54:58,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:54:58,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:54:58,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:54:58,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:54:58,440 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 09:54:58,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:54:58,773 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:54:58,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:54:58,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:54:58,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:54:58,779 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2020-10-12 09:54:58,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/185ba2e0f/5603683eda7f40bfa1e2f2885e14d83c/FLAG5098c338a [2020-10-12 09:54:59,275 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:54:59,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2020-10-12 09:54:59,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/185ba2e0f/5603683eda7f40bfa1e2f2885e14d83c/FLAG5098c338a [2020-10-12 09:54:59,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/185ba2e0f/5603683eda7f40bfa1e2f2885e14d83c [2020-10-12 09:54:59,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:54:59,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:54:59,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:54:59,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:54:59,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:54:59,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:54:59,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1be1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59, skipping insertion in model container [2020-10-12 09:54:59,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:54:59,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:54:59,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:54:59,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:54:59,817 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:54:59,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:54:59,864 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:54:59,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59 WrapperNode [2020-10-12 09:54:59,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:54:59,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:54:59,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:54:59,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:54:59,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:54:59,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:55:00,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:55:00,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:55:00,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:55:00,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:55:00,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (1/1) ... [2020-10-12 09:55:00,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:55:00,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:55:00,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:55:00,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:55:00,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (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 09:55:00,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:55:00,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:55:00,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:55:00,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:55:00,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:55:00,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:55:00,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:55:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:55:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:55:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:55:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:55:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:55:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:55:00,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:55:00,330 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 09:55:00,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:00 BoogieIcfgContainer [2020-10-12 09:55:00,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:55:00,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:55:00,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:55:00,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:55:00,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:54:59" (1/3) ... [2020-10-12 09:55:00,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7caad6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:00, skipping insertion in model container [2020-10-12 09:55:00,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:54:59" (2/3) ... [2020-10-12 09:55:00,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7caad6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:00, skipping insertion in model container [2020-10-12 09:55:00,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:00" (3/3) ... [2020-10-12 09:55:00,342 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2020-10-12 09:55:00,353 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:55:00,362 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:55:00,382 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:55:00,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:55:00,410 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:55:00,411 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:55:00,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:55:00,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:55:00,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:55:00,412 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:55:00,412 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:55:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-12 09:55:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 09:55:00,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:00,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:00,443 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:00,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2020-10-12 09:55:00,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:00,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660788427] [2020-10-12 09:55:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:00,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:00,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:00,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:00,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:00,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 09:55:00,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:00,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-12 09:55:00,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:00,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:00,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:55:00,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:55:01,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:01,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:01,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:01,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:01,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:55:01,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:01,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:01,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:01,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:01,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:01,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660788427] [2020-10-12 09:55:01,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:55:01,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:55:01,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551314311] [2020-10-12 09:55:01,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:55:01,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:01,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:55:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:01,076 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-12 09:55:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:01,213 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2020-10-12 09:55:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:55:01,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-12 09:55:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:01,224 INFO L225 Difference]: With dead ends: 56 [2020-10-12 09:55:01,224 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 09:55:01,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 09:55:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-12 09:55:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 09:55:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-12 09:55:01,265 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-12 09:55:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:01,266 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-12 09:55:01,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:55:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-12 09:55:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:55:01,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:01,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:01,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:55:01,268 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:01,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2020-10-12 09:55:01,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:01,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289150154] [2020-10-12 09:55:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:01,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:01,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:01,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:02,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:02,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:55:02,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:02,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-12 09:55:02,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:02,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:55:02,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:02,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:55:02,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:02,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:02,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:02,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:02,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:02,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:02,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:02,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289150154] [2020-10-12 09:55:02,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:02,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:55:02,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230521003] [2020-10-12 09:55:02,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:55:02,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:02,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:55:02,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:55:02,844 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 12 states. [2020-10-12 09:55:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:03,286 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-12 09:55:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:55:03,287 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-12 09:55:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:03,289 INFO L225 Difference]: With dead ends: 39 [2020-10-12 09:55:03,289 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 09:55:03,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:55:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 09:55:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-12 09:55:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:55:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-12 09:55:03,301 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 22 [2020-10-12 09:55:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:03,301 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-12 09:55:03,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:55:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-12 09:55:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:55:03,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:03,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:03,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:55:03,303 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -4490095, now seen corresponding path program 1 times [2020-10-12 09:55:03,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:03,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823558390] [2020-10-12 09:55:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:03,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:03,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:55:03,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:03,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-12 09:55:03,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:03,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:55:03,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 09:55:03,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:55:03,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:03,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:03,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:03,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:03,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:03,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:03,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:03,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:03,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:03,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:03,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:03,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 09:55:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:03,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:03,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:03,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:03,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:03,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:03,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:55:03,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823558390] [2020-10-12 09:55:03,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:03,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:55:03,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240734764] [2020-10-12 09:55:03,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:55:03,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:55:03,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:55:03,837 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 5 states. [2020-10-12 09:55:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:03,924 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-12 09:55:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:55:03,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-12 09:55:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:03,928 INFO L225 Difference]: With dead ends: 65 [2020-10-12 09:55:03,928 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:55:03,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:55:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:55:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 09:55:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:55:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-12 09:55:03,937 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 30 [2020-10-12 09:55:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:03,938 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-12 09:55:03,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:55:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-12 09:55:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:55:03,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:03,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:03,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:55:03,940 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:03,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:03,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1087753673, now seen corresponding path program 2 times [2020-10-12 09:55:03,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:03,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213975359] [2020-10-12 09:55:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:03,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:04,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:06,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:55:06,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:06,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2057 [2020-10-12 09:55:06,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:06,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:55:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:06,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 09:55:06,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:06,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:06,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:06,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:06,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:55:06,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:06,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:06,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:06,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 09:55:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:06,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:06,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:06,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:06,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:55:06,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:06,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:06,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:06,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 09:55:06,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213975359] [2020-10-12 09:55:06,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:06,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:55:06,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423920669] [2020-10-12 09:55:06,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:55:06,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:06,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:55:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:55:06,125 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 6 states. [2020-10-12 09:55:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:06,274 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-12 09:55:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:55:06,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-12 09:55:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:06,278 INFO L225 Difference]: With dead ends: 74 [2020-10-12 09:55:06,278 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 09:55:06,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:55:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 09:55:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-12 09:55:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:55:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-12 09:55:06,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 35 [2020-10-12 09:55:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:06,295 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-12 09:55:06,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:55:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-12 09:55:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:55:06,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:06,299 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:06,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:55:06,300 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:06,300 INFO L82 PathProgramCache]: Analyzing trace with hash 322675081, now seen corresponding path program 3 times [2020-10-12 09:55:06,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:06,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073332801] [2020-10-12 09:55:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:06,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:10,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:10,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:55:10,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4202 [2020-10-12 09:55:10,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:10,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:55:10,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 09:55:10,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:55:10,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:10,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:10,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:10,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:10,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:10,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:10,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:10,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:10,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:10,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:10,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:10,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 09:55:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:10,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:10,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:10,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:10,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:10,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:10,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:10,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:10,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:10,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:10,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 09:55:10,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073332801] [2020-10-12 09:55:10,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:10,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:55:10,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260610769] [2020-10-12 09:55:10,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:55:10,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:10,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:55:10,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:55:10,596 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2020-10-12 09:55:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:10,773 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-10-12 09:55:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:55:10,774 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-12 09:55:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:10,776 INFO L225 Difference]: With dead ends: 83 [2020-10-12 09:55:10,776 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 09:55:10,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:55:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 09:55:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-12 09:55:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:55:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-12 09:55:10,799 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 40 [2020-10-12 09:55:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:10,800 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-12 09:55:10,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:55:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-12 09:55:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:55:10,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:10,809 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:10,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:55:10,809 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1004508223, now seen corresponding path program 4 times [2020-10-12 09:55:10,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:10,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708584574] [2020-10-12 09:55:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:10,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:10,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:10,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:15,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:15,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:55:15,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:15,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:55:15,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:55:15,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 09:55:15,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:55:15,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:15,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:15,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:15,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:15,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:15,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:15,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:15,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:15,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:55:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:15,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:15,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:15,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:15,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:15,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:15,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:15,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:15,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 09:55:15,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708584574] [2020-10-12 09:55:15,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:15,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:55:15,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792034128] [2020-10-12 09:55:15,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:55:15,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:55:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:55:15,972 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 8 states. [2020-10-12 09:55:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:16,137 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-12 09:55:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:55:16,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-12 09:55:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:16,139 INFO L225 Difference]: With dead ends: 92 [2020-10-12 09:55:16,139 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 09:55:16,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:55:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 09:55:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-12 09:55:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 09:55:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-12 09:55:16,153 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 45 [2020-10-12 09:55:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:16,153 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-12 09:55:16,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:55:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-12 09:55:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:55:16,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:16,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:16,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:55:16,159 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1696485759, now seen corresponding path program 5 times [2020-10-12 09:55:16,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:16,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510746057] [2020-10-12 09:55:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:16,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:16,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:16,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:21,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:55:21,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:21,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:55:21,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:55:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 09:55:21,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:55:21,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:21,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:21,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:21,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:21,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:21,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:21,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:21,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:21,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:21,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 09:55:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:21,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:21,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:21,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:21,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:21,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:21,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:21,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:21,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:21,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-12 09:55:21,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510746057] [2020-10-12 09:55:21,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:21,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:55:21,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571067319] [2020-10-12 09:55:21,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:55:21,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:21,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:55:21,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:55:21,320 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 9 states. [2020-10-12 09:55:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:21,508 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2020-10-12 09:55:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:55:21,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-12 09:55:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:21,511 INFO L225 Difference]: With dead ends: 101 [2020-10-12 09:55:21,511 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:55:21,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:55:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:55:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-12 09:55:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 09:55:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-12 09:55:21,534 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2020-10-12 09:55:21,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:21,535 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-12 09:55:21,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:55:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-12 09:55:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:55:21,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:21,542 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:21,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:55:21,543 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:21,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1402555975, now seen corresponding path program 6 times [2020-10-12 09:55:21,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:21,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582430467] [2020-10-12 09:55:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:21,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:26,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 09:55:26,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:55:26,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:55:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:55:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:55:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:26,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:26,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:26,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:26,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:26,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:26,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:26,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:26,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 09:55:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:26,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:26,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:26,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:26,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:26,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:26,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:26,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:26,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:26,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-10-12 09:55:26,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582430467] [2020-10-12 09:55:26,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:26,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:55:26,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003496700] [2020-10-12 09:55:26,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:55:26,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:55:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:55:26,682 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 10 states. [2020-10-12 09:55:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:26,827 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-12 09:55:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:55:26,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-12 09:55:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:26,829 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:55:26,829 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 09:55:26,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:55:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 09:55:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-12 09:55:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:55:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-12 09:55:26,838 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 55 [2020-10-12 09:55:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:26,838 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-12 09:55:26,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:55:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-12 09:55:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:55:26,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:26,840 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:26,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:55:26,840 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:26,841 INFO L82 PathProgramCache]: Analyzing trace with hash -643980423, now seen corresponding path program 7 times [2020-10-12 09:55:26,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:26,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249220482] [2020-10-12 09:55:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:26,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:55:31,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:31,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:55:31,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:55:31,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:55:31,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:55:31,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:31,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:31,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:31,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:31,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:31,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:31,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:31,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 09:55:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:31,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:31,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:31,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-12 09:55:31,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249220482] [2020-10-12 09:55:31,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:31,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:55:31,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731981511] [2020-10-12 09:55:31,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:55:31,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:31,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:55:31,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:55:31,956 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 11 states. [2020-10-12 09:55:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:32,096 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2020-10-12 09:55:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:55:32,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-12 09:55:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:32,097 INFO L225 Difference]: With dead ends: 119 [2020-10-12 09:55:32,098 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:55:32,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:55:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:55:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-12 09:55:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 09:55:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-12 09:55:32,107 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 60 [2020-10-12 09:55:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:32,108 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-12 09:55:32,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:55:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-12 09:55:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:55:32,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:32,109 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:32,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:55:32,109 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:32,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1600692145, now seen corresponding path program 8 times [2020-10-12 09:55:32,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:32,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476880871] [2020-10-12 09:55:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:37,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:55:37,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:37,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:55:37,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:37,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:55:37,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:55:37,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:55:37,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:37,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:37,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:37,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:37,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:37,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:37,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:37,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:37,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 09:55:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:37,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:37,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:37,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:37,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:37,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:37,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:37,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:37,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:37,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-12 09:55:37,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476880871] [2020-10-12 09:55:37,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:37,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:55:37,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106026111] [2020-10-12 09:55:37,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:55:37,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:55:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:55:37,244 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 12 states. [2020-10-12 09:55:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:37,370 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-12 09:55:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:55:37,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-12 09:55:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:37,372 INFO L225 Difference]: With dead ends: 128 [2020-10-12 09:55:37,372 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 09:55:37,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:55:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 09:55:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-12 09:55:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:55:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-12 09:55:37,381 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 65 [2020-10-12 09:55:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:37,382 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-12 09:55:37,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:55:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-12 09:55:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:55:37,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:37,383 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:37,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:55:37,383 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:37,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1818198129, now seen corresponding path program 9 times [2020-10-12 09:55:37,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:37,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444744928] [2020-10-12 09:55:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:37,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:42,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 09:55:42,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:42,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:55:42,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:42,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:55:42,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 09:55:42,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:55:42,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:42,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:42,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:42,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:42,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:42,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:42,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:42,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:42,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 09:55:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:42,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:42,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:42,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:42,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:42,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:42,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-12 09:55:42,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444744928] [2020-10-12 09:55:42,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:42,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:55:42,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718837367] [2020-10-12 09:55:42,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:55:42,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:42,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:55:42,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:55:42,507 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 13 states. [2020-10-12 09:55:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:42,686 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-10-12 09:55:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:55:42,686 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-12 09:55:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:42,687 INFO L225 Difference]: With dead ends: 137 [2020-10-12 09:55:42,687 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 09:55:42,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:55:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 09:55:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-12 09:55:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 09:55:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-12 09:55:42,702 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 70 [2020-10-12 09:55:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:42,703 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-12 09:55:42,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:55:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-12 09:55:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 09:55:42,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:42,704 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:42,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:55:42,705 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1491482025, now seen corresponding path program 10 times [2020-10-12 09:55:42,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:42,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731939228] [2020-10-12 09:55:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:42,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:47,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:47,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 09:55:47,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:47,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 09:55:47,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:47,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:55:47,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 09:55:47,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:55:47,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:47,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:47,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:47,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:47,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:47,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:47,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:47,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:47,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:47,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:47,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:47,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:47,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 09:55:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:47,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:47,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:47,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:47,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:47,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:47,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:47,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:47,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:47,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:47,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-10-12 09:55:47,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731939228] [2020-10-12 09:55:47,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:47,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:55:47,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89915995] [2020-10-12 09:55:47,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:55:47,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:47,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:55:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:55:47,864 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 14 states. [2020-10-12 09:55:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:48,000 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-10-12 09:55:48,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:55:48,000 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-12 09:55:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:48,001 INFO L225 Difference]: With dead ends: 146 [2020-10-12 09:55:48,001 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 09:55:48,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:55:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 09:55:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-12 09:55:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 09:55:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-12 09:55:48,014 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 75 [2020-10-12 09:55:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:48,014 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-12 09:55:48,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:55:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-12 09:55:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 09:55:48,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:48,016 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:48,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:55:48,016 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:48,017 INFO L82 PathProgramCache]: Analyzing trace with hash -904444567, now seen corresponding path program 11 times [2020-10-12 09:55:48,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:48,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232147266] [2020-10-12 09:55:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:53,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 09:55:53,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:53,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-12 09:55:53,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:53,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:55:53,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-12 09:55:53,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:55:53,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:53,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:53,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:53,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:53,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:53,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:53,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:53,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:53,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:53,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:53,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:53,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-12 09:55:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:53,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:53,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:53,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:53,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:53,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-12 09:55:53,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232147266] [2020-10-12 09:55:53,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:53,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:55:53,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555304057] [2020-10-12 09:55:53,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:55:53,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:55:53,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:55:53,249 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 15 states. [2020-10-12 09:55:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:53,506 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2020-10-12 09:55:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:55:53,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-10-12 09:55:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:53,508 INFO L225 Difference]: With dead ends: 155 [2020-10-12 09:55:53,508 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 09:55:53,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:55:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 09:55:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-12 09:55:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 09:55:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-12 09:55:53,531 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 80 [2020-10-12 09:55:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:53,531 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-12 09:55:53,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:55:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-12 09:55:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 09:55:53,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:53,533 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:53,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:55:53,533 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:53,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1432390751, now seen corresponding path program 12 times [2020-10-12 09:55:53,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:53,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649237813] [2020-10-12 09:55:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:58,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:58,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 09:55:58,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:58,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:55:58,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:55:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:55:58,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:58,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:58,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:58,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:58,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:58,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:58,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:58,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:58,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-12 09:55:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:58,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:58,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:58,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:58,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:58,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:58,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:58,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:58,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:58,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-12 09:55:58,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649237813] [2020-10-12 09:55:58,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:58,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:55:58,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715397897] [2020-10-12 09:55:58,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:55:58,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:58,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:55:58,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:55:58,740 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 16 states. [2020-10-12 09:55:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:58,947 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-10-12 09:55:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:55:58,947 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2020-10-12 09:55:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:58,948 INFO L225 Difference]: With dead ends: 164 [2020-10-12 09:55:58,948 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 09:55:58,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:55:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 09:55:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-12 09:55:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 09:55:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-12 09:55:58,966 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 85 [2020-10-12 09:55:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:58,967 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-12 09:55:58,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:55:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-12 09:55:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 09:55:58,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:58,968 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:58,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:55:58,968 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1011551647, now seen corresponding path program 13 times [2020-10-12 09:55:58,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:58,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103926273] [2020-10-12 09:55:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:58,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:59,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:59,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:04,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 09:56:04,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:04,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 09:56:04,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:04,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:56:04,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-12 09:56:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:56:04,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:04,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:04,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:04,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:04,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:04,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:04,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:04,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:04,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-12 09:56:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:04,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:04,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:04,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:04,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:04,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-10-12 09:56:04,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103926273] [2020-10-12 09:56:04,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:04,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:56:04,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137620275] [2020-10-12 09:56:04,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:56:04,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:56:04,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:56:04,175 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 17 states. [2020-10-12 09:56:04,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:04,422 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2020-10-12 09:56:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:56:04,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2020-10-12 09:56:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:04,424 INFO L225 Difference]: With dead ends: 173 [2020-10-12 09:56:04,424 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 09:56:04,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:56:04,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 09:56:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-12 09:56:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 09:56:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-12 09:56:04,444 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 90 [2020-10-12 09:56:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:04,444 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-12 09:56:04,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:56:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-12 09:56:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 09:56:04,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:04,447 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:04,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:56:04,447 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2085902745, now seen corresponding path program 14 times [2020-10-12 09:56:04,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:04,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976701854] [2020-10-12 09:56:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:04,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:09,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 09:56:09,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:09,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 09:56:09,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:56:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 09:56:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:56:09,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:09,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:09,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:09,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:09,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:09,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:09,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:09,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:09,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:09,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-12 09:56:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:09,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:09,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:09,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:09,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:09,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:09,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:09,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:09,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:09,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-10-12 09:56:09,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976701854] [2020-10-12 09:56:09,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:09,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:56:09,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784562950] [2020-10-12 09:56:09,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:56:09,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:09,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:56:09,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:56:09,684 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 18 states. [2020-10-12 09:56:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:09,913 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2020-10-12 09:56:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:56:09,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-10-12 09:56:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:09,916 INFO L225 Difference]: With dead ends: 182 [2020-10-12 09:56:09,917 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 09:56:09,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:56:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 09:56:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-10-12 09:56:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:56:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-12 09:56:09,926 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 95 [2020-10-12 09:56:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:09,926 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-12 09:56:09,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:56:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-12 09:56:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 09:56:09,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:09,928 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:09,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:56:09,928 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:09,928 INFO L82 PathProgramCache]: Analyzing trace with hash 69764953, now seen corresponding path program 15 times [2020-10-12 09:56:09,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:09,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225240915] [2020-10-12 09:56:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:09,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:10,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:14,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:14,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 09:56:14,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:14,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:56:14,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:56:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:56:14,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:15,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:15,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:15,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:15,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:15,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:15,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:15,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:15,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:15,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:15,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:15,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:15,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-12 09:56:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:15,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:15,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:15,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:15,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:15,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:56:15,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:15,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:15,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2020-10-12 09:56:15,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225240915] [2020-10-12 09:56:15,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:15,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:56:15,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838431946] [2020-10-12 09:56:15,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:56:15,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:15,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:56:15,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:56:15,138 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 19 states. [2020-10-12 09:56:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:15,405 INFO L93 Difference]: Finished difference Result 191 states and 199 transitions. [2020-10-12 09:56:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:56:15,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 100 [2020-10-12 09:56:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:15,407 INFO L225 Difference]: With dead ends: 191 [2020-10-12 09:56:15,408 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 09:56:15,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:56:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 09:56:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-10-12 09:56:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 09:56:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-12 09:56:15,416 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 100 [2020-10-12 09:56:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:15,416 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-12 09:56:15,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:56:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-12 09:56:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-12 09:56:15,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:15,417 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:15,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:56:15,418 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1950029935, now seen corresponding path program 16 times [2020-10-12 09:56:15,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:15,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078664665] [2020-10-12 09:56:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:16,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:20,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:20,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 09:56:20,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:20,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-12 09:56:20,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:20,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:56:20,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 09:56:20,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:56:20,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:20,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:20,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:20,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:20,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:20,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:20,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:20,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:20,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:20,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:20,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:20,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-12 09:56:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:20,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:20,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:20,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:20,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:20,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:20,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:20,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:20,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:20,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:20,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2020-10-12 09:56:20,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078664665] [2020-10-12 09:56:20,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:20,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:56:20,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421597873] [2020-10-12 09:56:20,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:56:20,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:20,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:56:20,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:56:20,722 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 20 states. [2020-10-12 09:56:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:21,008 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2020-10-12 09:56:21,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:56:21,009 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-10-12 09:56:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:21,010 INFO L225 Difference]: With dead ends: 200 [2020-10-12 09:56:21,010 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 09:56:21,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:56:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 09:56:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-12 09:56:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 09:56:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-12 09:56:21,020 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 105 [2020-10-12 09:56:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:21,020 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-12 09:56:21,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:56:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-12 09:56:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 09:56:21,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:21,021 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:21,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:56:21,022 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1872624559, now seen corresponding path program 17 times [2020-10-12 09:56:21,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:21,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364617542] [2020-10-12 09:56:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:21,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:23,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:26,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 09:56:26,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:26,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 09:56:26,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:26,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:56:26,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 09:56:26,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:56:26,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:26,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:26,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:26,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:26,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:26,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:26,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:26,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:26,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:26,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:26,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:26,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-12 09:56:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:26,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:26,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:26,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:26,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:26,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:26,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:26,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:26,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:26,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2020-10-12 09:56:26,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364617542] [2020-10-12 09:56:26,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:26,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:56:26,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346027701] [2020-10-12 09:56:26,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:56:26,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:26,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:56:26,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:56:26,305 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 21 states. [2020-10-12 09:56:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:26,583 INFO L93 Difference]: Finished difference Result 209 states and 217 transitions. [2020-10-12 09:56:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:56:26,584 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2020-10-12 09:56:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:26,585 INFO L225 Difference]: With dead ends: 209 [2020-10-12 09:56:26,586 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 09:56:26,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:56:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 09:56:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-12 09:56:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 09:56:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-12 09:56:26,597 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 110 [2020-10-12 09:56:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:26,598 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-12 09:56:26,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:56:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-12 09:56:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 09:56:26,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:26,599 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:26,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:56:26,600 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1397678711, now seen corresponding path program 18 times [2020-10-12 09:56:26,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:26,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030524090] [2020-10-12 09:56:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:28,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:31,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:31,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-12 09:56:31,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:31,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:56:31,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:31,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:56:31,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:56:31,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:56:31,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:56:31,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:31,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:31,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:31,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:31,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:31,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:31,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:31,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:31,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:31,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-12 09:56:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:31,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:31,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:31,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:31,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:31,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:31,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:31,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:31,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:31,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:31,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2020-10-12 09:56:31,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030524090] [2020-10-12 09:56:31,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:31,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:56:31,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795447598] [2020-10-12 09:56:31,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:56:31,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:56:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:56:31,916 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 22 states. [2020-10-12 09:56:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:32,139 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2020-10-12 09:56:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:56:32,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-10-12 09:56:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:32,140 INFO L225 Difference]: With dead ends: 218 [2020-10-12 09:56:32,140 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 09:56:32,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:56:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 09:56:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2020-10-12 09:56:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 09:56:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-10-12 09:56:32,150 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 115 [2020-10-12 09:56:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:32,151 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-10-12 09:56:32,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:56:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-10-12 09:56:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 09:56:32,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:32,152 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:32,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:56:32,153 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1196517705, now seen corresponding path program 19 times [2020-10-12 09:56:32,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:32,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785160111] [2020-10-12 09:56:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:32,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:32,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:34,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:37,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 09:56:37,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:37,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 09:56:37,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:37,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:56:37,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:37,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 09:56:37,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:37,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:37,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:37,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:37,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:37,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:37,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:37,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:37,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 09:56:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:37,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:37,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:37,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:37,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:37,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:37,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:37,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:37,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:37,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-10-12 09:56:37,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785160111] [2020-10-12 09:56:37,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:37,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:56:37,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639753701] [2020-10-12 09:56:37,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:56:37,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:56:37,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:56:37,465 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 23 states. [2020-10-12 09:56:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:37,759 INFO L93 Difference]: Finished difference Result 227 states and 235 transitions. [2020-10-12 09:56:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:56:37,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 120 [2020-10-12 09:56:37,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:37,761 INFO L225 Difference]: With dead ends: 227 [2020-10-12 09:56:37,761 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 09:56:37,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:56:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 09:56:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-12 09:56:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 09:56:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2020-10-12 09:56:37,772 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 120 [2020-10-12 09:56:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:37,773 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2020-10-12 09:56:37,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:56:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2020-10-12 09:56:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-12 09:56:37,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:37,775 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:37,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:56:37,775 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:37,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1222179713, now seen corresponding path program 20 times [2020-10-12 09:56:37,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:37,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683512219] [2020-10-12 09:56:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:37,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:41,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:42,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:42,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-12 09:56:42,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:42,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:56:42,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:56:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:56:42,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:43,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:43,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:43,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:43,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:43,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:43,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:43,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-12 09:56:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:43,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:43,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:43,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:43,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:43,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:43,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2020-10-12 09:56:43,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683512219] [2020-10-12 09:56:43,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:43,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:56:43,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881642609] [2020-10-12 09:56:43,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:56:43,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:56:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:56:43,102 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand 24 states. [2020-10-12 09:56:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:43,422 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2020-10-12 09:56:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:56:43,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 125 [2020-10-12 09:56:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:43,426 INFO L225 Difference]: With dead ends: 236 [2020-10-12 09:56:43,426 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 09:56:43,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:56:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 09:56:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-12 09:56:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 09:56:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-12 09:56:43,439 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 125 [2020-10-12 09:56:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:43,439 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-12 09:56:43,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:56:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-12 09:56:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 09:56:43,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:43,442 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:43,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:56:43,442 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:43,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:43,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1642509889, now seen corresponding path program 21 times [2020-10-12 09:56:43,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:43,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711975702] [2020-10-12 09:56:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:43,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:46,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:48,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 09:56:48,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:48,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-12 09:56:48,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:56:48,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-12 09:56:48,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:56:48,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:48,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:48,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:48,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:48,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:48,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:48,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:48,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-12 09:56:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:48,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:48,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:48,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:56:48,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:48,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2020-10-12 09:56:48,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711975702] [2020-10-12 09:56:48,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:48,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:56:48,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410884076] [2020-10-12 09:56:48,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:56:48,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:56:48,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:56:48,872 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 25 states. [2020-10-12 09:56:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:49,137 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2020-10-12 09:56:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:56:49,138 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 130 [2020-10-12 09:56:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:49,139 INFO L225 Difference]: With dead ends: 245 [2020-10-12 09:56:49,139 INFO L226 Difference]: Without dead ends: 140 [2020-10-12 09:56:49,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:56:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-12 09:56:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-12 09:56:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-12 09:56:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2020-10-12 09:56:49,149 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 130 [2020-10-12 09:56:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:49,150 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2020-10-12 09:56:49,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:56:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2020-10-12 09:56:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-12 09:56:49,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:49,151 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:49,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:56:49,151 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash -537099911, now seen corresponding path program 22 times [2020-10-12 09:56:49,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:49,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319859737] [2020-10-12 09:56:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:49,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:49,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:49,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:54,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-12 09:56:54,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:54,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5292 [2020-10-12 09:56:54,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:54,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:56:54,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:56:54,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:56:54,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:54,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:54,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:54,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:54,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:54,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:54,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:54,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:54,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:54,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:54,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:54,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-12 09:56:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:54,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:54,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2020-10-12 09:56:54,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319859737] [2020-10-12 09:56:54,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:54,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:56:54,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189442710] [2020-10-12 09:56:54,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:56:54,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:54,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:56:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:56:54,813 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand 26 states. [2020-10-12 09:56:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:55,164 INFO L93 Difference]: Finished difference Result 254 states and 262 transitions. [2020-10-12 09:56:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:56:55,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2020-10-12 09:56:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:55,166 INFO L225 Difference]: With dead ends: 254 [2020-10-12 09:56:55,167 INFO L226 Difference]: Without dead ends: 145 [2020-10-12 09:56:55,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:56:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-12 09:56:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2020-10-12 09:56:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 09:56:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2020-10-12 09:56:55,177 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 135 [2020-10-12 09:56:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:55,177 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2020-10-12 09:56:55,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:56:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2020-10-12 09:56:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 09:56:55,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:55,179 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:55,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:56:55,179 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash -216929479, now seen corresponding path program 23 times [2020-10-12 09:56:55,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:55,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118402176] [2020-10-12 09:56:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:55,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:55,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:00,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 09:57:00,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:00,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 09:57:00,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:57:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 09:57:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:57:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:00,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:00,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:00,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:00,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:00,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:57:00,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:00,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:00,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-12 09:57:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:00,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:00,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:00,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:00,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:00,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:00,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2020-10-12 09:57:00,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118402176] [2020-10-12 09:57:00,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:00,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:57:00,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470109272] [2020-10-12 09:57:00,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:57:00,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:00,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:57:00,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:57:00,612 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand 27 states. [2020-10-12 09:57:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:01,007 INFO L93 Difference]: Finished difference Result 263 states and 271 transitions. [2020-10-12 09:57:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:57:01,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 140 [2020-10-12 09:57:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:01,009 INFO L225 Difference]: With dead ends: 263 [2020-10-12 09:57:01,009 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 09:57:01,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:57:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 09:57:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-10-12 09:57:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 09:57:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2020-10-12 09:57:01,021 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 140 [2020-10-12 09:57:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:01,021 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2020-10-12 09:57:01,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:57:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2020-10-12 09:57:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-12 09:57:01,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:01,023 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:01,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:57:01,023 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:01,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2015645839, now seen corresponding path program 24 times [2020-10-12 09:57:01,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:01,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789709205] [2020-10-12 09:57:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:01,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:06,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-12 09:57:06,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:57:06,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5122 [2020-10-12 09:57:06,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:57:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:57:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:57:06,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:06,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:06,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:06,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:06,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:06,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:06,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:06,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:06,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:06,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:06,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:06,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-12 09:57:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:06,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:06,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:06,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:06,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:06,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked. [2020-10-12 09:57:06,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789709205] [2020-10-12 09:57:06,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:06,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:57:06,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564682839] [2020-10-12 09:57:06,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:57:06,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:06,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:57:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:57:06,591 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand 28 states. [2020-10-12 09:57:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:06,978 INFO L93 Difference]: Finished difference Result 272 states and 280 transitions. [2020-10-12 09:57:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:57:06,980 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 145 [2020-10-12 09:57:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:06,981 INFO L225 Difference]: With dead ends: 272 [2020-10-12 09:57:06,982 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 09:57:06,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:57:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 09:57:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-12 09:57:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 09:57:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2020-10-12 09:57:06,991 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 145 [2020-10-12 09:57:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:06,991 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2020-10-12 09:57:06,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:57:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2020-10-12 09:57:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 09:57:06,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:06,993 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:06,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:57:06,993 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1740834865, now seen corresponding path program 25 times [2020-10-12 09:57:06,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:06,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670666740] [2020-10-12 09:57:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:07,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:07,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:12,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:12,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 09:57:12,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:12,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-12 09:57:12,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:57:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 09:57:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:57:12,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:12,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:12,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:12,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-10-12 09:57:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:12,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:12,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:12,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:12,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:12,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:12,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:12,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:12,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:12,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2020-10-12 09:57:12,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670666740] [2020-10-12 09:57:12,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:12,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:57:12,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460178969] [2020-10-12 09:57:12,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:57:12,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:12,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:57:12,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:57:12,500 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand 29 states. [2020-10-12 09:57:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:12,863 INFO L93 Difference]: Finished difference Result 281 states and 289 transitions. [2020-10-12 09:57:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:57:12,864 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2020-10-12 09:57:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:12,865 INFO L225 Difference]: With dead ends: 281 [2020-10-12 09:57:12,865 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 09:57:12,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:57:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 09:57:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-12 09:57:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-12 09:57:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2020-10-12 09:57:12,875 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 150 [2020-10-12 09:57:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:12,875 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2020-10-12 09:57:12,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:57:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2020-10-12 09:57:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-12 09:57:12,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:12,876 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:12,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:57:12,877 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1815512425, now seen corresponding path program 26 times [2020-10-12 09:57:12,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:12,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413960027] [2020-10-12 09:57:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:12,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:12,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:18,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:18,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-12 09:57:18,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5185 [2020-10-12 09:57:18,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:57:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:57:18,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:18,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:18,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:18,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:18,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:18,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:18,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:18,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:18,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:18,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-12 09:57:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:18,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:18,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:18,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:18,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:18,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:57:18,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:18,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:18,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:18,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 2 proven. 351 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2020-10-12 09:57:18,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413960027] [2020-10-12 09:57:18,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:18,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:57:18,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347659489] [2020-10-12 09:57:18,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:57:18,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:57:18,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:57:18,652 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand 30 states. [2020-10-12 09:57:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:19,068 INFO L93 Difference]: Finished difference Result 290 states and 298 transitions. [2020-10-12 09:57:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:57:19,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 155 [2020-10-12 09:57:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:19,070 INFO L225 Difference]: With dead ends: 290 [2020-10-12 09:57:19,071 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 09:57:19,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:57:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 09:57:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-10-12 09:57:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 09:57:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2020-10-12 09:57:19,082 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 155 [2020-10-12 09:57:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:19,082 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2020-10-12 09:57:19,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:57:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2020-10-12 09:57:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-12 09:57:19,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:19,084 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:19,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:57:19,084 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash 116002089, now seen corresponding path program 27 times [2020-10-12 09:57:19,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:19,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013070686] [2020-10-12 09:57:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:19,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:19,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:24,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:24,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-12 09:57:24,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:57:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 09:57:24,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:57:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 09:57:24,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:24,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:24,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:24,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:24,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:24,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:24,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:24,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:24,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:24,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:24,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:24,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:24,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-10-12 09:57:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:24,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:24,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:24,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:24,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:24,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:24,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:24,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:24,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:24,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:24,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 2 proven. 378 refuted. 0 times theorem prover too weak. 1460 trivial. 0 not checked. [2020-10-12 09:57:24,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013070686] [2020-10-12 09:57:24,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:24,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:57:24,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566769021] [2020-10-12 09:57:24,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:57:24,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:24,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:57:24,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:57:24,597 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand 31 states. [2020-10-12 09:57:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:25,009 INFO L93 Difference]: Finished difference Result 299 states and 307 transitions. [2020-10-12 09:57:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:57:25,010 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2020-10-12 09:57:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:25,012 INFO L225 Difference]: With dead ends: 299 [2020-10-12 09:57:25,016 INFO L226 Difference]: Without dead ends: 170 [2020-10-12 09:57:25,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:57:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-12 09:57:25,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2020-10-12 09:57:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-12 09:57:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2020-10-12 09:57:25,031 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 160 [2020-10-12 09:57:25,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:25,032 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2020-10-12 09:57:25,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:57:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2020-10-12 09:57:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-12 09:57:25,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:25,033 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:25,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:57:25,034 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:25,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1322058593, now seen corresponding path program 28 times [2020-10-12 09:57:25,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:25,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954915027] [2020-10-12 09:57:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:25,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:25,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:30,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:30,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-12 09:57:30,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:57:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-12 09:57:30,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:57:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:57:30,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:30,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:30,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:30,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:30,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:30,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:30,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:30,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:30,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:30,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:30,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:30,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-12 09:57:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:30,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:30,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:30,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:30,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:30,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:30,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:30,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:30,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:30,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:30,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 1570 trivial. 0 not checked. [2020-10-12 09:57:30,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954915027] [2020-10-12 09:57:30,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:30,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:57:30,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208360342] [2020-10-12 09:57:30,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:57:30,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:30,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:57:30,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:57:30,692 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand 32 states. [2020-10-12 09:57:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:31,187 INFO L93 Difference]: Finished difference Result 308 states and 316 transitions. [2020-10-12 09:57:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:57:31,188 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 165 [2020-10-12 09:57:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:31,189 INFO L225 Difference]: With dead ends: 308 [2020-10-12 09:57:31,190 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 09:57:31,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:57:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 09:57:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-12 09:57:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-12 09:57:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2020-10-12 09:57:31,207 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 165 [2020-10-12 09:57:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:31,207 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2020-10-12 09:57:31,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:57:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2020-10-12 09:57:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-12 09:57:31,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:31,210 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:31,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:57:31,211 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1903622689, now seen corresponding path program 29 times [2020-10-12 09:57:31,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:31,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139365552] [2020-10-12 09:57:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:31,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:31,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:31,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:36,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:36,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-12 09:57:36,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:36,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-12 09:57:36,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:57:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-10-12 09:57:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:57:36,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:36,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:36,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:36,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:36,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:36,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:36,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:36,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:36,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:36,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:36,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:36,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-10-12 09:57:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:36,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:36,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:36,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:36,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:36,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:36,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-10-12 09:57:36,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139365552] [2020-10-12 09:57:36,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:36,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:57:36,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651729827] [2020-10-12 09:57:36,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:57:36,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:57:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:57:36,925 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand 33 states. [2020-10-12 09:57:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:37,317 INFO L93 Difference]: Finished difference Result 317 states and 325 transitions. [2020-10-12 09:57:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:57:37,317 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 170 [2020-10-12 09:57:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:37,319 INFO L225 Difference]: With dead ends: 317 [2020-10-12 09:57:37,319 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 09:57:37,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:57:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 09:57:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-12 09:57:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 09:57:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2020-10-12 09:57:37,329 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 170 [2020-10-12 09:57:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:37,330 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2020-10-12 09:57:37,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:57:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2020-10-12 09:57:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-12 09:57:37,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:37,331 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:37,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:57:37,332 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:37,332 INFO L82 PathProgramCache]: Analyzing trace with hash 123677017, now seen corresponding path program 30 times [2020-10-12 09:57:37,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:37,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353179055] [2020-10-12 09:57:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:37,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:37,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:42,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:42,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-12 09:57:42,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:57:42,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5310 [2020-10-12 09:57:42,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:42,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:57:42,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:57:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:57:42,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:43,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:43,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:43,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:43,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:43,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:43,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:43,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:43,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:43,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:43,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-10-12 09:57:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:43,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:43,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:43,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:43,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:43,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:43,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:43,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:43,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:43,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:43,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2020-10-12 09:57:43,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353179055] [2020-10-12 09:57:43,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:43,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:57:43,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896855435] [2020-10-12 09:57:43,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:57:43,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:43,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:57:43,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:57:43,265 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand 34 states. [2020-10-12 09:57:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:43,752 INFO L93 Difference]: Finished difference Result 326 states and 334 transitions. [2020-10-12 09:57:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:57:43,752 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 175 [2020-10-12 09:57:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:43,754 INFO L225 Difference]: With dead ends: 326 [2020-10-12 09:57:43,754 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 09:57:43,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:57:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 09:57:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2020-10-12 09:57:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 09:57:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2020-10-12 09:57:43,766 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 175 [2020-10-12 09:57:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:43,766 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2020-10-12 09:57:43,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:57:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2020-10-12 09:57:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-12 09:57:43,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:43,768 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:43,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:57:43,768 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash 576311065, now seen corresponding path program 31 times [2020-10-12 09:57:43,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:43,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687104362] [2020-10-12 09:57:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:43,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:48,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:48,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 09:57:48,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:57:48,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5118 [2020-10-12 09:57:48,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:57:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:57:48,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:49,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:49,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:49,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:49,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:49,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:49,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:49,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:49,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-10-12 09:57:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:49,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:49,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:49,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:49,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:49,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:49,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:49,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:49,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2422 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2020-10-12 09:57:49,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687104362] [2020-10-12 09:57:49,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:49,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:57:49,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270467190] [2020-10-12 09:57:49,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:57:49,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:57:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:57:49,543 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand 35 states. [2020-10-12 09:57:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:50,173 INFO L93 Difference]: Finished difference Result 335 states and 343 transitions. [2020-10-12 09:57:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:57:50,174 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 180 [2020-10-12 09:57:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:50,176 INFO L225 Difference]: With dead ends: 335 [2020-10-12 09:57:50,176 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 09:57:50,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:57:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 09:57:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-10-12 09:57:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-12 09:57:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2020-10-12 09:57:50,201 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 180 [2020-10-12 09:57:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:50,202 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2020-10-12 09:57:50,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:57:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2020-10-12 09:57:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-12 09:57:50,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:50,204 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:50,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:57:50,205 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 61667153, now seen corresponding path program 32 times [2020-10-12 09:57:50,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:50,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824097094] [2020-10-12 09:57:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:50,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:50,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:55,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:55,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-12 09:57:55,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:57:55,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-12 09:57:55,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:55,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:57:55,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:55,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:57:55,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:56,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:56,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:56,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:56,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:56,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:56,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:56,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:56,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:56,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:56,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-12 09:57:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:56,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:56,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:56,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:56,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:56,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:56,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:56,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:56,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:56,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 528 refuted. 0 times theorem prover too weak. 2050 trivial. 0 not checked. [2020-10-12 09:57:56,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824097094] [2020-10-12 09:57:56,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:56,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:57:56,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283874759] [2020-10-12 09:57:56,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:57:56,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:56,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:57:56,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:57:56,087 INFO L87 Difference]: Start difference. First operand 188 states and 191 transitions. Second operand 36 states. [2020-10-12 09:57:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:56,513 INFO L93 Difference]: Finished difference Result 344 states and 352 transitions. [2020-10-12 09:57:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:57:56,514 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2020-10-12 09:57:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:56,515 INFO L225 Difference]: With dead ends: 344 [2020-10-12 09:57:56,516 INFO L226 Difference]: Without dead ends: 195 [2020-10-12 09:57:56,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:57:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-12 09:57:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2020-10-12 09:57:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 09:57:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2020-10-12 09:57:56,528 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 185 [2020-10-12 09:57:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:56,529 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2020-10-12 09:57:56,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:57:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2020-10-12 09:57:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-12 09:57:56,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:56,530 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:56,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:57:56,531 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash -293434351, now seen corresponding path program 33 times [2020-10-12 09:57:56,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:56,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131134676] [2020-10-12 09:57:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:56,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:01,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:01,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-12 09:58:01,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:01,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-12 09:58:01,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:01,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:58:01,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:01,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:58:01,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:02,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:02,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:02,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:02,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:02,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:02,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:02,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:02,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:02,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:02,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:02,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:02,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-12 09:58:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:02,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:02,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:02,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:02,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:02,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:02,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2743 backedges. 2 proven. 561 refuted. 0 times theorem prover too weak. 2180 trivial. 0 not checked. [2020-10-12 09:58:02,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131134676] [2020-10-12 09:58:02,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:02,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:58:02,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859725957] [2020-10-12 09:58:02,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:58:02,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:58:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:58:02,367 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand 37 states. [2020-10-12 09:58:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:02,927 INFO L93 Difference]: Finished difference Result 353 states and 361 transitions. [2020-10-12 09:58:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:58:02,927 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 190 [2020-10-12 09:58:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:02,929 INFO L225 Difference]: With dead ends: 353 [2020-10-12 09:58:02,929 INFO L226 Difference]: Without dead ends: 200 [2020-10-12 09:58:02,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:58:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-12 09:58:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-10-12 09:58:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 09:58:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 201 transitions. [2020-10-12 09:58:02,942 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 201 transitions. Word has length 190 [2020-10-12 09:58:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:02,942 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 201 transitions. [2020-10-12 09:58:02,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:58:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 201 transitions. [2020-10-12 09:58:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-12 09:58:02,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:02,944 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:02,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:58:02,944 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash -948540087, now seen corresponding path program 34 times [2020-10-12 09:58:02,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:02,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396296088] [2020-10-12 09:58:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:02,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:03,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:07,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:07,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-12 09:58:07,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:07,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:58:07,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:58:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:58:07,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:08,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:08,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:08,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:08,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:08,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:08,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:08,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:08,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:08,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:08,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:08,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-10-12 09:58:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:08,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:08,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:08,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:08,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:08,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:08,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:08,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:08,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:08,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:08,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2911 backedges. 2 proven. 595 refuted. 0 times theorem prover too weak. 2314 trivial. 0 not checked. [2020-10-12 09:58:08,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396296088] [2020-10-12 09:58:08,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:08,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:58:08,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063138122] [2020-10-12 09:58:08,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:58:08,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:08,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:58:08,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:58:08,684 INFO L87 Difference]: Start difference. First operand 198 states and 201 transitions. Second operand 38 states. [2020-10-12 09:58:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:09,254 INFO L93 Difference]: Finished difference Result 362 states and 370 transitions. [2020-10-12 09:58:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:58:09,255 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 195 [2020-10-12 09:58:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:09,256 INFO L225 Difference]: With dead ends: 362 [2020-10-12 09:58:09,256 INFO L226 Difference]: Without dead ends: 205 [2020-10-12 09:58:09,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:58:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-12 09:58:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2020-10-12 09:58:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-12 09:58:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2020-10-12 09:58:09,271 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 195 [2020-10-12 09:58:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:09,271 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2020-10-12 09:58:09,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:58:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2020-10-12 09:58:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-12 09:58:09,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:09,273 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:09,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:58:09,273 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2065616631, now seen corresponding path program 35 times [2020-10-12 09:58:09,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:09,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579039732] [2020-10-12 09:58:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:09,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:09,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:14,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:14,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-12 09:58:14,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:14,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-12 09:58:14,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:58:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:58:14,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:15,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:15,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:15,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:15,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:15,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:15,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:15,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:15,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:15,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:15,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:15,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:15,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-10-12 09:58:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:15,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:15,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:15,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:15,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:15,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:15,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:15,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:15,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:15,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:15,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3084 backedges. 2 proven. 630 refuted. 0 times theorem prover too weak. 2452 trivial. 0 not checked. [2020-10-12 09:58:15,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579039732] [2020-10-12 09:58:15,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:15,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:58:15,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304463233] [2020-10-12 09:58:15,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:58:15,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:15,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:58:15,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:58:15,155 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand 39 states. [2020-10-12 09:58:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:15,634 INFO L93 Difference]: Finished difference Result 371 states and 379 transitions. [2020-10-12 09:58:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:58:15,635 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 200 [2020-10-12 09:58:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:15,637 INFO L225 Difference]: With dead ends: 371 [2020-10-12 09:58:15,637 INFO L226 Difference]: Without dead ends: 210 [2020-10-12 09:58:15,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:58:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-12 09:58:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-10-12 09:58:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 09:58:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2020-10-12 09:58:15,649 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 200 [2020-10-12 09:58:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:15,649 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2020-10-12 09:58:15,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:58:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2020-10-12 09:58:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-12 09:58:15,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:15,651 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:15,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:58:15,651 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:15,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1820035905, now seen corresponding path program 36 times [2020-10-12 09:58:15,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:15,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495651685] [2020-10-12 09:58:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:15,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:15,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:20,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-12 09:58:20,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5258 [2020-10-12 09:58:20,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:58:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:58:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:21,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:21,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:21,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:21,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:21,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:21,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:21,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:21,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:21,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-10-12 09:58:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:21,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:21,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:21,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:21,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:21,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:21,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:21,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:21,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:21,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:21,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3262 backedges. 2 proven. 666 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2020-10-12 09:58:21,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495651685] [2020-10-12 09:58:21,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:21,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:58:21,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543853170] [2020-10-12 09:58:21,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:58:21,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:21,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:58:21,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:58:21,768 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand 40 states. [2020-10-12 09:58:22,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:22,281 INFO L93 Difference]: Finished difference Result 380 states and 388 transitions. [2020-10-12 09:58:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:58:22,282 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 205 [2020-10-12 09:58:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:22,283 INFO L225 Difference]: With dead ends: 380 [2020-10-12 09:58:22,284 INFO L226 Difference]: Without dead ends: 215 [2020-10-12 09:58:22,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:58:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-12 09:58:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2020-10-12 09:58:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-12 09:58:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2020-10-12 09:58:22,298 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 205 [2020-10-12 09:58:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:22,298 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2020-10-12 09:58:22,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:58:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2020-10-12 09:58:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-12 09:58:22,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:22,300 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:22,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:58:22,300 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash -295322111, now seen corresponding path program 37 times [2020-10-12 09:58:22,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:22,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476581517] [2020-10-12 09:58:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:22,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:22,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:27,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:27,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-12 09:58:27,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:27,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-10-12 09:58:27,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 09:58:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-12 09:58:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 09:58:27,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:28,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:28,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:28,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:28,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:28,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:28,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:28,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:28,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:28,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:28,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:28,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-10-12 09:58:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:28,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:28,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:28,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:28,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:28,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:28,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:28,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 2074 trivial. 0 not checked. [2020-10-12 09:58:28,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476581517] [2020-10-12 09:58:28,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:28,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 09:58:28,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606586973] [2020-10-12 09:58:28,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 09:58:28,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:28,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 09:58:28,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:58:28,456 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand 41 states. [2020-10-12 09:58:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:28,951 INFO L93 Difference]: Finished difference Result 389 states and 397 transitions. [2020-10-12 09:58:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 09:58:28,952 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 210 [2020-10-12 09:58:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:28,954 INFO L225 Difference]: With dead ends: 389 [2020-10-12 09:58:28,954 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 09:58:28,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:58:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 09:58:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2020-10-12 09:58:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-12 09:58:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 221 transitions. [2020-10-12 09:58:28,965 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 221 transitions. Word has length 210 [2020-10-12 09:58:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:28,965 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 221 transitions. [2020-10-12 09:58:28,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 09:58:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 221 transitions. [2020-10-12 09:58:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-12 09:58:28,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:28,967 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:28,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:58:28,967 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:28,968 INFO L82 PathProgramCache]: Analyzing trace with hash 578572601, now seen corresponding path program 38 times [2020-10-12 09:58:28,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:28,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751733089] [2020-10-12 09:58:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:29,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:29,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:34,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:34,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-12 09:58:34,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:34,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5412 [2020-10-12 09:58:34,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 09:58:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-12 09:58:34,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 09:58:34,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:35,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:35,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:35,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:35,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:35,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:35,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:35,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:35,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:35,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:35,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:35,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:35,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-10-12 09:58:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:35,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:35,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:35,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:35,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:35,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:35,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:35,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3633 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2020-10-12 09:58:35,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751733089] [2020-10-12 09:58:35,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:35,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 09:58:35,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974410145] [2020-10-12 09:58:35,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 09:58:35,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 09:58:35,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:58:35,292 INFO L87 Difference]: Start difference. First operand 218 states and 221 transitions. Second operand 42 states. [2020-10-12 09:58:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:35,890 INFO L93 Difference]: Finished difference Result 398 states and 406 transitions. [2020-10-12 09:58:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 09:58:35,891 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 215 [2020-10-12 09:58:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:35,893 INFO L225 Difference]: With dead ends: 398 [2020-10-12 09:58:35,893 INFO L226 Difference]: Without dead ends: 225 [2020-10-12 09:58:35,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:58:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-12 09:58:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-10-12 09:58:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-12 09:58:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2020-10-12 09:58:35,905 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 215 [2020-10-12 09:58:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:35,906 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2020-10-12 09:58:35,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 09:58:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2020-10-12 09:58:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-12 09:58:35,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:35,907 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:35,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:58:35,908 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:35,908 INFO L82 PathProgramCache]: Analyzing trace with hash 234894073, now seen corresponding path program 39 times [2020-10-12 09:58:35,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:35,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309813571] [2020-10-12 09:58:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:35,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:36,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:41,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:41,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-12 09:58:41,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:41,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5607 [2020-10-12 09:58:41,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 09:58:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 09:58:41,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:42,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:42,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:42,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:42,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:42,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:42,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:42,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:42,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-12 09:58:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:42,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:42,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:42,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:42,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:42,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:42,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:42,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:42,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:42,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:42,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3826 backedges. 2 proven. 780 refuted. 0 times theorem prover too weak. 3044 trivial. 0 not checked. [2020-10-12 09:58:42,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309813571] [2020-10-12 09:58:42,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:42,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 09:58:42,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861590177] [2020-10-12 09:58:42,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 09:58:42,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 09:58:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:58:42,456 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand 43 states. [2020-10-12 09:58:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:43,101 INFO L93 Difference]: Finished difference Result 407 states and 415 transitions. [2020-10-12 09:58:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 09:58:43,101 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 220 [2020-10-12 09:58:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:43,103 INFO L225 Difference]: With dead ends: 407 [2020-10-12 09:58:43,103 INFO L226 Difference]: Without dead ends: 230 [2020-10-12 09:58:43,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:58:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-12 09:58:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2020-10-12 09:58:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-12 09:58:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 231 transitions. [2020-10-12 09:58:43,116 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 231 transitions. Word has length 220 [2020-10-12 09:58:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:43,117 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 231 transitions. [2020-10-12 09:58:43,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 09:58:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 231 transitions. [2020-10-12 09:58:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-12 09:58:43,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:43,118 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:43,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 09:58:43,119 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1355235535, now seen corresponding path program 40 times [2020-10-12 09:58:43,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:43,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639323323] [2020-10-12 09:58:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:43,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:43,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:48,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:48,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-12 09:58:48,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:48,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5372 [2020-10-12 09:58:48,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:48,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 09:58:48,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:48,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:58:48,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:49,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:49,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:49,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:49,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:49,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:49,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:49,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-12 09:58:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:49,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:49,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:49,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:49,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:49,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:49,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4024 backedges. 2 proven. 820 refuted. 0 times theorem prover too weak. 3202 trivial. 0 not checked. [2020-10-12 09:58:49,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639323323] [2020-10-12 09:58:49,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:49,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 09:58:49,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475883217] [2020-10-12 09:58:49,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 09:58:49,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 09:58:49,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:58:49,547 INFO L87 Difference]: Start difference. First operand 228 states and 231 transitions. Second operand 44 states. [2020-10-12 09:58:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:50,190 INFO L93 Difference]: Finished difference Result 416 states and 424 transitions. [2020-10-12 09:58:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 09:58:50,191 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 225 [2020-10-12 09:58:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:50,192 INFO L225 Difference]: With dead ends: 416 [2020-10-12 09:58:50,193 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 09:58:50,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:58:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 09:58:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2020-10-12 09:58:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-12 09:58:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 236 transitions. [2020-10-12 09:58:50,207 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 236 transitions. Word has length 225 [2020-10-12 09:58:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:50,208 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 236 transitions. [2020-10-12 09:58:50,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 09:58:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 236 transitions. [2020-10-12 09:58:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-12 09:58:50,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:50,209 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:50,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 09:58:50,210 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash 547393521, now seen corresponding path program 41 times [2020-10-12 09:58:50,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:50,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674509054] [2020-10-12 09:58:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:50,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:50,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:55,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:55,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-12 09:58:55,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:55,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5455 [2020-10-12 09:58:55,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:55,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 09:58:55,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:55,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 09:58:55,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:56,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:56,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:56,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:56,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:56,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:56,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:56,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:56,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:56,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-10-12 09:58:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:56,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:56,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:56,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:56,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:56,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:56,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:56,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:56,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:56,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:56,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 2 proven. 861 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2020-10-12 09:58:56,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674509054] [2020-10-12 09:58:56,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:56,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 09:58:56,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131669813] [2020-10-12 09:58:56,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 09:58:56,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 09:58:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:58:56,759 INFO L87 Difference]: Start difference. First operand 233 states and 236 transitions. Second operand 45 states. [2020-10-12 09:58:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:57,366 INFO L93 Difference]: Finished difference Result 425 states and 433 transitions. [2020-10-12 09:58:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 09:58:57,368 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 230 [2020-10-12 09:58:57,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:57,369 INFO L225 Difference]: With dead ends: 425 [2020-10-12 09:58:57,369 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 09:58:57,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:58:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 09:58:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2020-10-12 09:58:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-12 09:58:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 241 transitions. [2020-10-12 09:58:57,383 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 241 transitions. Word has length 230 [2020-10-12 09:58:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:57,383 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 241 transitions. [2020-10-12 09:58:57,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 09:58:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 241 transitions. [2020-10-12 09:58:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-12 09:58:57,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:57,385 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:57,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 09:58:57,386 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:57,386 INFO L82 PathProgramCache]: Analyzing trace with hash -294595287, now seen corresponding path program 42 times [2020-10-12 09:58:57,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:57,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134109860] [2020-10-12 09:58:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:57,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking...