/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_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:51:05,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:51:05,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:51:05,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:51:05,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:51:05,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:51:05,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:51:05,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:51:05,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:51:05,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:51:05,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:51:05,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:51:05,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:51:05,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:51:05,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:51:05,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:51:05,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:51:05,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:51:05,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:51:05,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:51:05,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:51:05,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:51:05,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:51:05,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:51:05,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:51:05,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:51:05,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:51:05,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:51:05,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:51:05,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:51:05,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:51:05,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:51:05,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:51:05,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:51:05,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:51:05,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:51:05,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:51:05,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:51:05,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:51:05,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:51:05,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:51:05,437 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 09:51:05,459 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:51:05,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:51:05,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:51:05,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:51:05,461 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:51:05,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:51:05,461 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:51:05,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:51:05,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:51:05,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:51:05,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:51:05,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:51:05,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:51:05,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:51:05,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:51:05,463 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:51:05,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:51:05,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:51:05,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:51:05,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:51:05,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:51:05,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:05,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:51:05,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:51:05,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:51:05,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:51:05,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:51:05,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:51:05,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:51:05,466 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 09:51:05,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:51:05,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:51:05,765 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:51:05,767 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:51:05,767 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:51:05,768 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2020-10-12 09:51:05,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73da31670/10180ea562cf4bb0a5a31a8a7041a855/FLAG6f4709c51 [2020-10-12 09:51:06,267 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:51:06,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2020-10-12 09:51:06,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73da31670/10180ea562cf4bb0a5a31a8a7041a855/FLAG6f4709c51 [2020-10-12 09:51:06,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73da31670/10180ea562cf4bb0a5a31a8a7041a855 [2020-10-12 09:51:06,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:51:06,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:51:06,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:06,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:51:06,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:51:06,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:06,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ca24e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06, skipping insertion in model container [2020-10-12 09:51:06,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:06,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:51:06,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:51:06,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:06,930 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:51:06,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:06,982 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:51:06,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06 WrapperNode [2020-10-12 09:51:06,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:06,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:51:06,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:51:06,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:07,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:07,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:07,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:07,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:07,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:07,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:07,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (1/1) ... [2020-10-12 09:51:07,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:07,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:07,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:07,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:07,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:07,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:07,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:07,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:07,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:07,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:07,562 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-12 09:51:07,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:07 BoogieIcfgContainer [2020-10-12 09:51:07,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:07,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:07,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:07,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:07,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:51:06" (1/3) ... [2020-10-12 09:51:07,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45407c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:07, skipping insertion in model container [2020-10-12 09:51:07,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:06" (2/3) ... [2020-10-12 09:51:07,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45407c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:07, skipping insertion in model container [2020-10-12 09:51:07,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:07" (3/3) ... [2020-10-12 09:51:07,580 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2020-10-12 09:51:07,595 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:07,605 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:07,633 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:07,686 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:07,686 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:07,686 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:07,686 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:07,686 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:07,687 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:07,687 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:07,687 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-12 09:51:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 09:51:07,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:07,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:07,719 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:07,726 INFO L82 PathProgramCache]: Analyzing trace with hash 772526198, now seen corresponding path program 1 times [2020-10-12 09:51:07,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:07,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946628941] [2020-10-12 09:51:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:07,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:09,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:09,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 09:51:09,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:51:09,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-12 09:51:09,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:09,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:09,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:09,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:09,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:09,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:09,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:09,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:09,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:51:09,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:09,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:09,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:09,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:09,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:09,561 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 09:51:09,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946628941] [2020-10-12 09:51:09,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:09,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:09,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219572988] [2020-10-12 09:51:09,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:09,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:09,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:09,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:09,591 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-10-12 09:51:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:09,826 INFO L93 Difference]: Finished difference Result 88 states and 131 transitions. [2020-10-12 09:51:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:09,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-12 09:51:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:09,842 INFO L225 Difference]: With dead ends: 88 [2020-10-12 09:51:09,842 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 09:51:09,848 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 09:51:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 09:51:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-12 09:51:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:51:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-12 09:51:09,921 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 25 [2020-10-12 09:51:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:09,923 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-12 09:51:09,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-12 09:51:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:51:09,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:09,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:09,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:09,930 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:09,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1854451550, now seen corresponding path program 1 times [2020-10-12 09:51:09,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:09,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045842399] [2020-10-12 09:51:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:09,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:14,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:14,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:51:14,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:51:14,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:51:14,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:14,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:15,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:15,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:15,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:15,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:15,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:15,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:15,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:15,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:15,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 09:51:15,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045842399] [2020-10-12 09:51:15,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:15,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:15,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872788529] [2020-10-12 09:51:15,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:15,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:15,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:15,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:15,059 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 5 states. [2020-10-12 09:51:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:15,286 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2020-10-12 09:51:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:15,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-12 09:51:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:15,288 INFO L225 Difference]: With dead ends: 92 [2020-10-12 09:51:15,288 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 09:51:15,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:51:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 09:51:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-10-12 09:51:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:51:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-12 09:51:15,301 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 37 [2020-10-12 09:51:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:15,302 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-12 09:51:15,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-12 09:51:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:51:15,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:15,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:15,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:15,305 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2002402898, now seen corresponding path program 2 times [2020-10-12 09:51:15,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:15,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584328823] [2020-10-12 09:51:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:15,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:15,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:15,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:15,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:20,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:51:20,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:20,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:51:20,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:20,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:20,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:20,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:20,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:20,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:20,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:20,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:20,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:20,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 09:51:20,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584328823] [2020-10-12 09:51:20,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:20,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:20,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852339983] [2020-10-12 09:51:20,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:20,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:20,382 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 6 states. [2020-10-12 09:51:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:20,606 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2020-10-12 09:51:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:20,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-12 09:51:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:20,609 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:51:20,609 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 09:51:20,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 09:51:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 09:51:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-10-12 09:51:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:51:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-12 09:51:20,620 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 49 [2020-10-12 09:51:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:20,620 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-12 09:51:20,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-12 09:51:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:51:20,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:20,623 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:20,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:20,624 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1043476666, now seen corresponding path program 3 times [2020-10-12 09:51:20,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:20,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797175397] [2020-10-12 09:51:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:20,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:25,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:51:25,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:25,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 09:51:25,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:25,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:51:25,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:51:25,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:51:25,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:25,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:25,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:25,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:25,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:25,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:25,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:25,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 09:51:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-12 09:51:25,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797175397] [2020-10-12 09:51:25,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:25,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:51:25,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820075020] [2020-10-12 09:51:25,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:51:25,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:25,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:51:25,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:25,796 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 7 states. [2020-10-12 09:51:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:26,164 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2020-10-12 09:51:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:51:26,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-12 09:51:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:26,166 INFO L225 Difference]: With dead ends: 136 [2020-10-12 09:51:26,167 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 09:51:26,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 09:51:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 09:51:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-10-12 09:51:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:51:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-12 09:51:26,185 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 61 [2020-10-12 09:51:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:26,186 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-12 09:51:26,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:51:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-12 09:51:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 09:51:26,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:26,189 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:26,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:26,189 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:26,189 INFO L82 PathProgramCache]: Analyzing trace with hash -233545158, now seen corresponding path program 4 times [2020-10-12 09:51:26,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:26,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788395373] [2020-10-12 09:51:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:26,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:26,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:26,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:26,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:31,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:31,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 09:51:31,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:31,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:51:31,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:31,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:51:31,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:31,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:51:31,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:31,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:31,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:31,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:31,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:31,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:31,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:31,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:31,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-12 09:51:31,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788395373] [2020-10-12 09:51:31,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:31,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:51:31,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060304606] [2020-10-12 09:51:31,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:51:31,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:51:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:31,337 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 8 states. [2020-10-12 09:51:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:31,686 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2020-10-12 09:51:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:51:31,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-12 09:51:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:31,689 INFO L225 Difference]: With dead ends: 158 [2020-10-12 09:51:31,689 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 09:51:31,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 09:51:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 09:51:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-10-12 09:51:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 09:51:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2020-10-12 09:51:31,719 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 73 [2020-10-12 09:51:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:31,720 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2020-10-12 09:51:31,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:51:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2020-10-12 09:51:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 09:51:31,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:31,724 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:31,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:31,725 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:31,726 INFO L82 PathProgramCache]: Analyzing trace with hash -941689042, now seen corresponding path program 5 times [2020-10-12 09:51:31,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:31,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900078338] [2020-10-12 09:51:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:31,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:31,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:31,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:31,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:31,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:36,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 09:51:36,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:36,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:51:36,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:51:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:51:36,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:36,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:36,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:36,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:36,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:36,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:36,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:36,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-12 09:51:36,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900078338] [2020-10-12 09:51:36,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:36,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:51:36,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914987489] [2020-10-12 09:51:36,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:51:36,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:51:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:36,844 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 9 states. [2020-10-12 09:51:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:37,129 INFO L93 Difference]: Finished difference Result 180 states and 198 transitions. [2020-10-12 09:51:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:51:37,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-12 09:51:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:37,131 INFO L225 Difference]: With dead ends: 180 [2020-10-12 09:51:37,131 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 09:51:37,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:51:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 09:51:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2020-10-12 09:51:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:51:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2020-10-12 09:51:37,142 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 85 [2020-10-12 09:51:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:37,142 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2020-10-12 09:51:37,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:51:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2020-10-12 09:51:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 09:51:37,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:37,144 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:37,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:37,144 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash 509513250, now seen corresponding path program 6 times [2020-10-12 09:51:37,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:37,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712403147] [2020-10-12 09:51:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:37,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:37,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:37,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:42,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 09:51:42,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:51:42,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:51:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 09:51:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:51:42,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:42,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:42,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:42,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:42,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:42,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:42,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:42,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:42,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:42,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:42,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-12 09:51:42,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712403147] [2020-10-12 09:51:42,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:42,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:51:42,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878340372] [2020-10-12 09:51:42,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:51:42,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:51:42,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:42,295 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand 10 states. [2020-10-12 09:51:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:42,611 INFO L93 Difference]: Finished difference Result 202 states and 220 transitions. [2020-10-12 09:51:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:51:42,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-10-12 09:51:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:42,613 INFO L225 Difference]: With dead ends: 202 [2020-10-12 09:51:42,613 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 09:51:42,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 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 09:51:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 09:51:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2020-10-12 09:51:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:51:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2020-10-12 09:51:42,637 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 97 [2020-10-12 09:51:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:42,638 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2020-10-12 09:51:42,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:51:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2020-10-12 09:51:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-12 09:51:42,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:42,640 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:42,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:42,640 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash -331077866, now seen corresponding path program 7 times [2020-10-12 09:51:42,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:42,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843139713] [2020-10-12 09:51:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:47,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:47,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 09:51:47,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:47,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-12 09:51:47,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:47,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:51:47,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:51:47,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:51:47,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:47,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:47,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:47,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:47,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:47,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:47,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:47,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:47,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:47,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:47,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-12 09:51:47,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843139713] [2020-10-12 09:51:47,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:47,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:51:47,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805027806] [2020-10-12 09:51:47,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:51:47,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:47,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:51:47,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:47,806 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand 11 states. [2020-10-12 09:51:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:48,198 INFO L93 Difference]: Finished difference Result 224 states and 242 transitions. [2020-10-12 09:51:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:51:48,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-10-12 09:51:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:48,200 INFO L225 Difference]: With dead ends: 224 [2020-10-12 09:51:48,200 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 09:51:48,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 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 09:51:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 09:51:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2020-10-12 09:51:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 09:51:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2020-10-12 09:51:48,226 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 109 [2020-10-12 09:51:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:48,227 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2020-10-12 09:51:48,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:51:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2020-10-12 09:51:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-12 09:51:48,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:48,233 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:48,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:51:48,234 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1136706058, now seen corresponding path program 8 times [2020-10-12 09:51:48,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:48,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358544373] [2020-10-12 09:51:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:48,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:48,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:48,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:48,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:48,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:53,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-12 09:51:53,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:53,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:51:53,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:51:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:51:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:51:53,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:53,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:53,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:53,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:53,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:53,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:53,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:53,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-10-12 09:51:53,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358544373] [2020-10-12 09:51:53,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:53,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:51:53,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681582137] [2020-10-12 09:51:53,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:51:53,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:51:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:51:53,391 INFO L87 Difference]: Start difference. First operand 127 states and 134 transitions. Second operand 12 states. [2020-10-12 09:51:53,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:53,761 INFO L93 Difference]: Finished difference Result 246 states and 264 transitions. [2020-10-12 09:51:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:51:53,761 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 121 [2020-10-12 09:51:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:53,762 INFO L225 Difference]: With dead ends: 246 [2020-10-12 09:51:53,763 INFO L226 Difference]: Without dead ends: 145 [2020-10-12 09:51:53,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 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 09:51:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-12 09:51:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2020-10-12 09:51:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 09:51:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 146 transitions. [2020-10-12 09:51:53,773 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 146 transitions. Word has length 121 [2020-10-12 09:51:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:53,774 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 146 transitions. [2020-10-12 09:51:53,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:51:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 146 transitions. [2020-10-12 09:51:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-12 09:51:53,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:53,775 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 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 09:51:53,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:51:53,776 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1384472318, now seen corresponding path program 9 times [2020-10-12 09:51:53,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:53,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456108882] [2020-10-12 09:51:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:53,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:58,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-12 09:51:58,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:58,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-12 09:51:58,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:58,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:51:58,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:51:58,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:51:58,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:58,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:58,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:58,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:58,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:58,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:58,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:58,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:58,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:58,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2020-10-12 09:51:59,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456108882] [2020-10-12 09:51:59,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:59,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:51:59,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147910137] [2020-10-12 09:51:59,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:51:59,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:51:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:51:59,019 INFO L87 Difference]: Start difference. First operand 139 states and 146 transitions. Second operand 13 states. [2020-10-12 09:51:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:59,445 INFO L93 Difference]: Finished difference Result 268 states and 286 transitions. [2020-10-12 09:51:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:51:59,446 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 133 [2020-10-12 09:51:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:59,448 INFO L225 Difference]: With dead ends: 268 [2020-10-12 09:51:59,448 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 09:51:59,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:51:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 09:51:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2020-10-12 09:51:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 09:51:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2020-10-12 09:51:59,458 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 133 [2020-10-12 09:51:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:59,458 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2020-10-12 09:51:59,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:51:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2020-10-12 09:51:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-12 09:51:59,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:59,460 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 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 09:51:59,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:51:59,460 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:59,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1640168946, now seen corresponding path program 10 times [2020-10-12 09:51:59,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:59,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640157895] [2020-10-12 09:51:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:59,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:04,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-12 09:52:04,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:04,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 09:52:04,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:52:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:52:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:52:04,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:04,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:04,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:04,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:04,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:04,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:04,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-10-12 09:52:04,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640157895] [2020-10-12 09:52:04,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:04,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:52:04,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874246107] [2020-10-12 09:52:04,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:52:04,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:04,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:52:04,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:04,643 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand 14 states. [2020-10-12 09:52:05,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:05,074 INFO L93 Difference]: Finished difference Result 290 states and 308 transitions. [2020-10-12 09:52:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:52:05,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 145 [2020-10-12 09:52:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:05,077 INFO L225 Difference]: With dead ends: 290 [2020-10-12 09:52:05,077 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 09:52:05,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 09:52:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2020-10-12 09:52:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 09:52:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 170 transitions. [2020-10-12 09:52:05,087 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 170 transitions. Word has length 145 [2020-10-12 09:52:05,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:05,087 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 170 transitions. [2020-10-12 09:52:05,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:52:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 170 transitions. [2020-10-12 09:52:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-12 09:52:05,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:05,089 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 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 09:52:05,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:52:05,089 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:05,090 INFO L82 PathProgramCache]: Analyzing trace with hash -701849882, now seen corresponding path program 11 times [2020-10-12 09:52:05,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:05,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644130789] [2020-10-12 09:52:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:05,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:10,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-12 09:52:10,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:10,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:52:10,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:10,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-12 09:52:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:10,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:10,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:10,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:10,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:10,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:10,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:10,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:10,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:52:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-10-12 09:52:10,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644130789] [2020-10-12 09:52:10,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:10,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:10,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597148180] [2020-10-12 09:52:10,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:10,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:10,278 INFO L87 Difference]: Start difference. First operand 163 states and 170 transitions. Second operand 15 states. [2020-10-12 09:52:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:10,764 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2020-10-12 09:52:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:10,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 157 [2020-10-12 09:52:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:10,766 INFO L225 Difference]: With dead ends: 312 [2020-10-12 09:52:10,766 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 09:52:10,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 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 09:52:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 09:52:10,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2020-10-12 09:52:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 09:52:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 182 transitions. [2020-10-12 09:52:10,782 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 182 transitions. Word has length 157 [2020-10-12 09:52:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:10,782 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 182 transitions. [2020-10-12 09:52:10,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 182 transitions. [2020-10-12 09:52:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-12 09:52:10,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:10,784 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 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 09:52:10,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:10,785 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash 804078042, now seen corresponding path program 12 times [2020-10-12 09:52:10,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:10,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364078662] [2020-10-12 09:52:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:10,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:15,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-12 09:52:15,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:15,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-12 09:52:15,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:15,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:16,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:16,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:16,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:16,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:16,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:16,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:16,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:16,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:16,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:16,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-10-12 09:52:16,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364078662] [2020-10-12 09:52:16,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:16,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:16,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138104332] [2020-10-12 09:52:16,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:16,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:16,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:16,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:16,027 INFO L87 Difference]: Start difference. First operand 175 states and 182 transitions. Second operand 16 states. [2020-10-12 09:52:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:16,533 INFO L93 Difference]: Finished difference Result 334 states and 352 transitions. [2020-10-12 09:52:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:16,534 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 169 [2020-10-12 09:52:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:16,536 INFO L225 Difference]: With dead ends: 334 [2020-10-12 09:52:16,536 INFO L226 Difference]: Without dead ends: 193 [2020-10-12 09:52:16,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 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 09:52:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-12 09:52:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2020-10-12 09:52:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 09:52:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 194 transitions. [2020-10-12 09:52:16,545 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 194 transitions. Word has length 169 [2020-10-12 09:52:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:16,545 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 194 transitions. [2020-10-12 09:52:16,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 194 transitions. [2020-10-12 09:52:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-12 09:52:16,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:16,547 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 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 09:52:16,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:52:16,548 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:16,548 INFO L82 PathProgramCache]: Analyzing trace with hash 180086478, now seen corresponding path program 13 times [2020-10-12 09:52:16,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:16,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126384701] [2020-10-12 09:52:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:16,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:21,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-12 09:52:21,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:21,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-12 09:52:21,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:21,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:21,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:21,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:21,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:21,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:21,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:21,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:21,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:21,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:21,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:21,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:21,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2020-10-12 09:52:21,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126384701] [2020-10-12 09:52:21,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:21,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:21,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353214156] [2020-10-12 09:52:21,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:21,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:21,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:21,834 INFO L87 Difference]: Start difference. First operand 187 states and 194 transitions. Second operand 17 states. [2020-10-12 09:52:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:22,388 INFO L93 Difference]: Finished difference Result 356 states and 374 transitions. [2020-10-12 09:52:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:22,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 181 [2020-10-12 09:52:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:22,390 INFO L225 Difference]: With dead ends: 356 [2020-10-12 09:52:22,391 INFO L226 Difference]: Without dead ends: 205 [2020-10-12 09:52:22,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 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 09:52:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-12 09:52:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2020-10-12 09:52:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-12 09:52:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 206 transitions. [2020-10-12 09:52:22,400 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 206 transitions. Word has length 181 [2020-10-12 09:52:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:22,400 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 206 transitions. [2020-10-12 09:52:22,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 206 transitions. [2020-10-12 09:52:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-12 09:52:22,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:22,403 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 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 09:52:22,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:52:22,403 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash 499617218, now seen corresponding path program 14 times [2020-10-12 09:52:22,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:22,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546099358] [2020-10-12 09:52:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:27,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-12 09:52:27,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:27,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5216 [2020-10-12 09:52:27,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:27,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:27,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:52:27,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:27,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:27,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:27,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:27,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:27,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:27,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:27,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:27,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:27,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:27,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:27,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2020-10-12 09:52:27,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546099358] [2020-10-12 09:52:27,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:27,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:27,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185058425] [2020-10-12 09:52:27,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:27,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:27,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:27,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:27,868 INFO L87 Difference]: Start difference. First operand 199 states and 206 transitions. Second operand 18 states. [2020-10-12 09:52:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:28,463 INFO L93 Difference]: Finished difference Result 378 states and 396 transitions. [2020-10-12 09:52:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:28,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 193 [2020-10-12 09:52:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:28,465 INFO L225 Difference]: With dead ends: 378 [2020-10-12 09:52:28,466 INFO L226 Difference]: Without dead ends: 217 [2020-10-12 09:52:28,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 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 09:52:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-12 09:52:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2020-10-12 09:52:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-12 09:52:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 218 transitions. [2020-10-12 09:52:28,474 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 218 transitions. Word has length 193 [2020-10-12 09:52:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:28,475 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 218 transitions. [2020-10-12 09:52:28,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 218 transitions. [2020-10-12 09:52:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-12 09:52:28,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:28,476 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 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 09:52:28,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:28,477 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1002518198, now seen corresponding path program 15 times [2020-10-12 09:52:28,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:28,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105264540] [2020-10-12 09:52:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:28,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:28,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:28,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:34,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:34,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-12 09:52:34,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:34,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5755 [2020-10-12 09:52:34,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:34,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:34,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:34,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:34,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:34,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:34,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:34,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:34,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:34,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-10-12 09:52:34,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105264540] [2020-10-12 09:52:34,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:34,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:34,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82602518] [2020-10-12 09:52:34,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:34,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:34,500 INFO L87 Difference]: Start difference. First operand 211 states and 218 transitions. Second operand 19 states. [2020-10-12 09:52:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:35,003 INFO L93 Difference]: Finished difference Result 400 states and 418 transitions. [2020-10-12 09:52:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:35,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 205 [2020-10-12 09:52:35,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:35,005 INFO L225 Difference]: With dead ends: 400 [2020-10-12 09:52:35,005 INFO L226 Difference]: Without dead ends: 229 [2020-10-12 09:52:35,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-12 09:52:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 223. [2020-10-12 09:52:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-12 09:52:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 230 transitions. [2020-10-12 09:52:35,022 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 230 transitions. Word has length 205 [2020-10-12 09:52:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:35,023 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 230 transitions. [2020-10-12 09:52:35,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 230 transitions. [2020-10-12 09:52:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-12 09:52:35,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:35,024 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 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 09:52:35,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:35,025 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1390010794, now seen corresponding path program 16 times [2020-10-12 09:52:35,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:35,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25776278] [2020-10-12 09:52:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:35,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:40,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:40,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-12 09:52:40,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:40,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-12 09:52:40,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:52:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-12 09:52:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:52:40,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:40,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:40,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:40,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:40,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:40,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:40,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:40,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2020-10-12 09:52:40,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25776278] [2020-10-12 09:52:40,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:40,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:52:40,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282165138] [2020-10-12 09:52:40,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:52:40,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:52:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:40,439 INFO L87 Difference]: Start difference. First operand 223 states and 230 transitions. Second operand 20 states. [2020-10-12 09:52:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:41,079 INFO L93 Difference]: Finished difference Result 422 states and 440 transitions. [2020-10-12 09:52:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:52:41,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 217 [2020-10-12 09:52:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:41,081 INFO L225 Difference]: With dead ends: 422 [2020-10-12 09:52:41,081 INFO L226 Difference]: Without dead ends: 241 [2020-10-12 09:52:41,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 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 09:52:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-12 09:52:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 235. [2020-10-12 09:52:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-12 09:52:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 242 transitions. [2020-10-12 09:52:41,092 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 242 transitions. Word has length 217 [2020-10-12 09:52:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:41,093 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 242 transitions. [2020-10-12 09:52:41,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:52:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 242 transitions. [2020-10-12 09:52:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-12 09:52:41,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:41,095 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 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 09:52:41,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:41,095 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1824689822, now seen corresponding path program 17 times [2020-10-12 09:52:41,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:41,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428857721] [2020-10-12 09:52:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:41,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:46,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-12 09:52:46,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:46,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-12 09:52:46,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:52:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-12 09:52:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:52:46,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:46,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:46,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:46,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:46,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:46,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2020-10-12 09:52:46,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428857721] [2020-10-12 09:52:46,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:46,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:52:46,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245983965] [2020-10-12 09:52:46,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:52:46,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:46,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:52:46,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:46,481 INFO L87 Difference]: Start difference. First operand 235 states and 242 transitions. Second operand 21 states. [2020-10-12 09:52:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:47,141 INFO L93 Difference]: Finished difference Result 444 states and 462 transitions. [2020-10-12 09:52:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:52:47,142 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 229 [2020-10-12 09:52:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:47,145 INFO L225 Difference]: With dead ends: 444 [2020-10-12 09:52:47,145 INFO L226 Difference]: Without dead ends: 253 [2020-10-12 09:52:47,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 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 09:52:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-12 09:52:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 247. [2020-10-12 09:52:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-12 09:52:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 254 transitions. [2020-10-12 09:52:47,154 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 254 transitions. Word has length 229 [2020-10-12 09:52:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:47,154 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 254 transitions. [2020-10-12 09:52:47,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:52:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 254 transitions. [2020-10-12 09:52:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-12 09:52:47,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:47,156 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 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 09:52:47,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:52:47,156 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1364443758, now seen corresponding path program 18 times [2020-10-12 09:52:47,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:47,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41222687] [2020-10-12 09:52:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:47,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:47,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:47,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:47,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:47,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:52,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:52,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-12 09:52:52,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:52,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-12 09:52:52,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:52,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:52:52,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:52,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:52:52,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:52,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:52,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:52,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:52,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:52,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:52,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:52,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:52,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1944 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2020-10-12 09:52:52,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41222687] [2020-10-12 09:52:52,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:52,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:52:52,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404189479] [2020-10-12 09:52:52,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:52:52,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:52:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:52:52,620 INFO L87 Difference]: Start difference. First operand 247 states and 254 transitions. Second operand 22 states. [2020-10-12 09:52:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:53,332 INFO L93 Difference]: Finished difference Result 466 states and 484 transitions. [2020-10-12 09:52:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:52:53,333 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 241 [2020-10-12 09:52:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:53,335 INFO L225 Difference]: With dead ends: 466 [2020-10-12 09:52:53,335 INFO L226 Difference]: Without dead ends: 265 [2020-10-12 09:52:53,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 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 09:52:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-12 09:52:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2020-10-12 09:52:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 09:52:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 266 transitions. [2020-10-12 09:52:53,346 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 266 transitions. Word has length 241 [2020-10-12 09:52:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:53,346 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 266 transitions. [2020-10-12 09:52:53,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:52:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 266 transitions. [2020-10-12 09:52:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-12 09:52:53,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:53,348 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 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 09:52:53,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:52:53,348 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:53,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1497886342, now seen corresponding path program 19 times [2020-10-12 09:52:53,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:53,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117151954] [2020-10-12 09:52:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:53,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:53,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:53,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:53,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:58,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-12 09:52:58,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:58,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:52:58,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:52:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-12 09:52:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:52:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:58,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:58,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:58,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:58,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:58,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:58,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:58,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:58,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2020-10-12 09:52:58,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117151954] [2020-10-12 09:52:58,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:58,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:52:58,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078907280] [2020-10-12 09:52:58,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:52:58,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:58,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:52:58,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:52:58,728 INFO L87 Difference]: Start difference. First operand 259 states and 266 transitions. Second operand 23 states. [2020-10-12 09:52:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:59,426 INFO L93 Difference]: Finished difference Result 488 states and 506 transitions. [2020-10-12 09:52:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:52:59,426 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 253 [2020-10-12 09:52:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:59,428 INFO L225 Difference]: With dead ends: 488 [2020-10-12 09:52:59,428 INFO L226 Difference]: Without dead ends: 277 [2020-10-12 09:52:59,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 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 09:52:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-12 09:52:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 271. [2020-10-12 09:52:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 09:52:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 278 transitions. [2020-10-12 09:52:59,440 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 278 transitions. Word has length 253 [2020-10-12 09:52:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:59,441 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 278 transitions. [2020-10-12 09:52:59,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:52:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 278 transitions. [2020-10-12 09:52:59,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-12 09:52:59,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:59,443 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 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 09:52:59,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:52:59,445 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash -926506630, now seen corresponding path program 20 times [2020-10-12 09:52:59,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:59,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74443805] [2020-10-12 09:52:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:59,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:59,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:59,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:59,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:04,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-12 09:53:04,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-12 09:53:04,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:04,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:04,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-12 09:53:04,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:04,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:04,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:04,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:04,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:04,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:04,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:53:04,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:04,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:04,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:04,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:04,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2020-10-12 09:53:05,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74443805] [2020-10-12 09:53:05,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:05,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:05,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514785251] [2020-10-12 09:53:05,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:05,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:05,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:05,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:05,023 INFO L87 Difference]: Start difference. First operand 271 states and 278 transitions. Second operand 24 states. [2020-10-12 09:53:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:05,936 INFO L93 Difference]: Finished difference Result 510 states and 528 transitions. [2020-10-12 09:53:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:05,937 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 265 [2020-10-12 09:53:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:05,939 INFO L225 Difference]: With dead ends: 510 [2020-10-12 09:53:05,940 INFO L226 Difference]: Without dead ends: 289 [2020-10-12 09:53:05,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:05,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-12 09:53:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 283. [2020-10-12 09:53:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-12 09:53:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 290 transitions. [2020-10-12 09:53:05,955 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 290 transitions. Word has length 265 [2020-10-12 09:53:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:05,956 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 290 transitions. [2020-10-12 09:53:05,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 290 transitions. [2020-10-12 09:53:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-12 09:53:05,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:05,959 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 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 09:53:05,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:53:05,959 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:05,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:05,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1960400494, now seen corresponding path program 21 times [2020-10-12 09:53:05,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:05,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995671737] [2020-10-12 09:53:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:11,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:11,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-12 09:53:11,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:11,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5297 [2020-10-12 09:53:11,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:11,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:11,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-12 09:53:11,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:11,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:11,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:11,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:11,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:11,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:11,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:11,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:11,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:11,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:11,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:11,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:11,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-12 09:53:11,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995671737] [2020-10-12 09:53:11,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:11,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:53:11,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032435693] [2020-10-12 09:53:11,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:53:11,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:11,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:53:11,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:11,897 INFO L87 Difference]: Start difference. First operand 283 states and 290 transitions. Second operand 25 states. [2020-10-12 09:53:12,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:12,695 INFO L93 Difference]: Finished difference Result 532 states and 550 transitions. [2020-10-12 09:53:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:53:12,696 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 277 [2020-10-12 09:53:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:12,698 INFO L225 Difference]: With dead ends: 532 [2020-10-12 09:53:12,698 INFO L226 Difference]: Without dead ends: 301 [2020-10-12 09:53:12,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-12 09:53:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 295. [2020-10-12 09:53:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-12 09:53:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 302 transitions. [2020-10-12 09:53:12,709 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 302 transitions. Word has length 277 [2020-10-12 09:53:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:12,710 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 302 transitions. [2020-10-12 09:53:12,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:53:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 302 transitions. [2020-10-12 09:53:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-12 09:53:12,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:12,712 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 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 09:53:12,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:53:12,712 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash -256832158, now seen corresponding path program 22 times [2020-10-12 09:53:12,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:12,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60190938] [2020-10-12 09:53:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:12,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:12,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:12,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:12,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:12,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:17,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:17,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-12 09:53:17,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:17,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-12 09:53:17,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 09:53:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:17,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:18,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:18,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:18,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:18,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:18,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:18,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:18,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:18,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:18,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:18,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:18,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2904 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-12 09:53:18,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60190938] [2020-10-12 09:53:18,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:18,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:18,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854739828] [2020-10-12 09:53:18,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:18,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:18,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:18,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:18,244 INFO L87 Difference]: Start difference. First operand 295 states and 302 transitions. Second operand 26 states. [2020-10-12 09:53:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:19,168 INFO L93 Difference]: Finished difference Result 554 states and 572 transitions. [2020-10-12 09:53:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:19,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 289 [2020-10-12 09:53:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:19,171 INFO L225 Difference]: With dead ends: 554 [2020-10-12 09:53:19,171 INFO L226 Difference]: Without dead ends: 313 [2020-10-12 09:53:19,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 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 09:53:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-12 09:53:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 307. [2020-10-12 09:53:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-12 09:53:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 314 transitions. [2020-10-12 09:53:19,186 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 314 transitions. Word has length 289 [2020-10-12 09:53:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:19,187 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 314 transitions. [2020-10-12 09:53:19,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 314 transitions. [2020-10-12 09:53:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-12 09:53:19,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:19,191 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 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 09:53:19,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:53:19,191 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:19,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:19,192 INFO L82 PathProgramCache]: Analyzing trace with hash -352401834, now seen corresponding path program 23 times [2020-10-12 09:53:19,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:19,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572754268] [2020-10-12 09:53:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:19,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:24,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-12 09:53:24,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:24,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-12 09:53:24,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:24,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:24,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:24,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:24,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:24,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:24,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:24,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:24,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:24,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:24,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:24,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3174 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2645 trivial. 0 not checked. [2020-10-12 09:53:24,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572754268] [2020-10-12 09:53:24,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:24,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:24,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996159634] [2020-10-12 09:53:24,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:24,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:24,751 INFO L87 Difference]: Start difference. First operand 307 states and 314 transitions. Second operand 27 states. [2020-10-12 09:53:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:25,601 INFO L93 Difference]: Finished difference Result 576 states and 594 transitions. [2020-10-12 09:53:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:25,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 301 [2020-10-12 09:53:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:25,605 INFO L225 Difference]: With dead ends: 576 [2020-10-12 09:53:25,606 INFO L226 Difference]: Without dead ends: 325 [2020-10-12 09:53:25,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 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 09:53:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-12 09:53:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 319. [2020-10-12 09:53:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-12 09:53:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 326 transitions. [2020-10-12 09:53:25,617 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 326 transitions. Word has length 301 [2020-10-12 09:53:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:25,617 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 326 transitions. [2020-10-12 09:53:25,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 326 transitions. [2020-10-12 09:53:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-12 09:53:25,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:25,620 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 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 09:53:25,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:53:25,623 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash 770933066, now seen corresponding path program 24 times [2020-10-12 09:53:25,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:25,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285844190] [2020-10-12 09:53:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:25,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:25,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:25,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:25,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:30,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-12 09:53:30,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:30,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5231 [2020-10-12 09:53:30,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:30,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:31,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:31,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:31,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:31,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:31,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:31,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:31,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:31,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3456 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2880 trivial. 0 not checked. [2020-10-12 09:53:31,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285844190] [2020-10-12 09:53:31,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:31,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:31,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803689195] [2020-10-12 09:53:31,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:31,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:31,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:31,437 INFO L87 Difference]: Start difference. First operand 319 states and 326 transitions. Second operand 28 states. [2020-10-12 09:53:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:32,341 INFO L93 Difference]: Finished difference Result 598 states and 616 transitions. [2020-10-12 09:53:32,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:32,342 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 313 [2020-10-12 09:53:32,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:32,345 INFO L225 Difference]: With dead ends: 598 [2020-10-12 09:53:32,345 INFO L226 Difference]: Without dead ends: 337 [2020-10-12 09:53:32,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-12 09:53:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 331. [2020-10-12 09:53:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-12 09:53:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 338 transitions. [2020-10-12 09:53:32,355 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 338 transitions. Word has length 313 [2020-10-12 09:53:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:32,355 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 338 transitions. [2020-10-12 09:53:32,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:32,356 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 338 transitions. [2020-10-12 09:53:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-12 09:53:32,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:32,358 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 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 09:53:32,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:53:32,358 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1623179714, now seen corresponding path program 25 times [2020-10-12 09:53:32,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:32,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830376402] [2020-10-12 09:53:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:37,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-12 09:53:37,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:37,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:53:37,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:37,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:53:37,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-12 09:53:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:53:37,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:37,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:37,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:37,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:37,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:37,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:37,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:37,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:37,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:37,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3750 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3125 trivial. 0 not checked. [2020-10-12 09:53:37,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830376402] [2020-10-12 09:53:37,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:37,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:53:37,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044418753] [2020-10-12 09:53:37,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:53:37,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:53:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:37,991 INFO L87 Difference]: Start difference. First operand 331 states and 338 transitions. Second operand 29 states. [2020-10-12 09:53:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:38,953 INFO L93 Difference]: Finished difference Result 620 states and 638 transitions. [2020-10-12 09:53:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:53:38,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 325 [2020-10-12 09:53:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:38,957 INFO L225 Difference]: With dead ends: 620 [2020-10-12 09:53:38,957 INFO L226 Difference]: Without dead ends: 349 [2020-10-12 09:53:38,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 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 09:53:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-12 09:53:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 343. [2020-10-12 09:53:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-12 09:53:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 350 transitions. [2020-10-12 09:53:38,967 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 350 transitions. Word has length 325 [2020-10-12 09:53:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:38,968 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 350 transitions. [2020-10-12 09:53:38,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:53:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 350 transitions. [2020-10-12 09:53:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-12 09:53:38,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:38,970 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 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 09:53:38,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:53:38,971 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1075182898, now seen corresponding path program 26 times [2020-10-12 09:53:38,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:38,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264691418] [2020-10-12 09:53:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:38,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:39,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:39,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:44,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-12 09:53:44,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:44,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5319 [2020-10-12 09:53:44,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:44,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:53:44,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:53:44,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:53:44,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:44,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:44,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:44,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:44,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:44,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:44,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:44,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4056 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3380 trivial. 0 not checked. [2020-10-12 09:53:44,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264691418] [2020-10-12 09:53:44,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:44,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:53:44,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195294646] [2020-10-12 09:53:44,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:53:44,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:53:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:44,974 INFO L87 Difference]: Start difference. First operand 343 states and 350 transitions. Second operand 30 states. [2020-10-12 09:53:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:45,981 INFO L93 Difference]: Finished difference Result 642 states and 660 transitions. [2020-10-12 09:53:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:53:45,982 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 337 [2020-10-12 09:53:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:45,984 INFO L225 Difference]: With dead ends: 642 [2020-10-12 09:53:45,984 INFO L226 Difference]: Without dead ends: 361 [2020-10-12 09:53:45,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 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 09:53:45,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-12 09:53:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2020-10-12 09:53:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-12 09:53:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 362 transitions. [2020-10-12 09:53:45,994 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 362 transitions. Word has length 337 [2020-10-12 09:53:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:45,995 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 362 transitions. [2020-10-12 09:53:45,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:53:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 362 transitions. [2020-10-12 09:53:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-12 09:53:45,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:45,997 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 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 09:53:45,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:53:45,997 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash 757448230, now seen corresponding path program 27 times [2020-10-12 09:53:45,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:45,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873950412] [2020-10-12 09:53:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:46,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:46,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:46,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:46,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:46,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:51,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:51,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-12 09:53:51,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:51,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:53:51,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:53:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 09:53:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:53:51,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:51,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:51,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:51,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:51,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:51,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:51,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:51,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:51,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4374 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 3645 trivial. 0 not checked. [2020-10-12 09:53:51,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873950412] [2020-10-12 09:53:51,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:51,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:53:51,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545555802] [2020-10-12 09:53:51,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:53:51,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:51,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:53:51,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:53:51,666 INFO L87 Difference]: Start difference. First operand 355 states and 362 transitions. Second operand 31 states. [2020-10-12 09:53:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:52,710 INFO L93 Difference]: Finished difference Result 664 states and 682 transitions. [2020-10-12 09:53:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:53:52,710 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 349 [2020-10-12 09:53:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:52,713 INFO L225 Difference]: With dead ends: 664 [2020-10-12 09:53:52,713 INFO L226 Difference]: Without dead ends: 373 [2020-10-12 09:53:52,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:53:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-12 09:53:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 367. [2020-10-12 09:53:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-12 09:53:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 374 transitions. [2020-10-12 09:53:52,724 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 374 transitions. Word has length 349 [2020-10-12 09:53:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:52,724 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 374 transitions. [2020-10-12 09:53:52,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:53:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 374 transitions. [2020-10-12 09:53:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-12 09:53:52,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:52,727 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 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 09:53:52,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:53:52,727 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:52,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1633648358, now seen corresponding path program 28 times [2020-10-12 09:53:52,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:52,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623434811] [2020-10-12 09:53:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:52,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:59,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:59,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-12 09:53:59,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:59,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6517 [2020-10-12 09:53:59,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:59,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:53:59,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:59,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:53:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:59,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:59,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:59,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:59,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:59,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:59,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:59,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 3920 trivial. 0 not checked. [2020-10-12 09:53:59,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623434811] [2020-10-12 09:53:59,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:59,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:53:59,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349676487] [2020-10-12 09:53:59,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:53:59,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:53:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:53:59,921 INFO L87 Difference]: Start difference. First operand 367 states and 374 transitions. Second operand 32 states. [2020-10-12 09:54:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:00,883 INFO L93 Difference]: Finished difference Result 686 states and 704 transitions. [2020-10-12 09:54:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:54:00,884 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 361 [2020-10-12 09:54:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:00,887 INFO L225 Difference]: With dead ends: 686 [2020-10-12 09:54:00,887 INFO L226 Difference]: Without dead ends: 385 [2020-10-12 09:54:00,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-12 09:54:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 379. [2020-10-12 09:54:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-12 09:54:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 386 transitions. [2020-10-12 09:54:00,897 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 386 transitions. Word has length 361 [2020-10-12 09:54:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:00,897 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 386 transitions. [2020-10-12 09:54:00,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:54:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 386 transitions. [2020-10-12 09:54:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-12 09:54:00,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:00,900 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 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 09:54:00,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:54:00,900 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:00,901 INFO L82 PathProgramCache]: Analyzing trace with hash -399030770, now seen corresponding path program 29 times [2020-10-12 09:54:00,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:00,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847407984] [2020-10-12 09:54:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-12 09:54:06,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:06,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5623 [2020-10-12 09:54:06,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:06,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:54:06,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:06,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:07,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:07,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:07,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:07,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:07,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:07,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5046 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 4205 trivial. 0 not checked. [2020-10-12 09:54:07,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847407984] [2020-10-12 09:54:07,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:07,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:54:07,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194743756] [2020-10-12 09:54:07,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:54:07,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:54:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:07,242 INFO L87 Difference]: Start difference. First operand 379 states and 386 transitions. Second operand 33 states. [2020-10-12 09:54:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:08,405 INFO L93 Difference]: Finished difference Result 708 states and 726 transitions. [2020-10-12 09:54:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:54:08,406 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 373 [2020-10-12 09:54:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:08,409 INFO L225 Difference]: With dead ends: 708 [2020-10-12 09:54:08,409 INFO L226 Difference]: Without dead ends: 397 [2020-10-12 09:54:08,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-12 09:54:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 391. [2020-10-12 09:54:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-12 09:54:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 398 transitions. [2020-10-12 09:54:08,419 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 398 transitions. Word has length 373 [2020-10-12 09:54:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:08,420 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 398 transitions. [2020-10-12 09:54:08,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:54:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 398 transitions. [2020-10-12 09:54:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-10-12 09:54:08,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:08,423 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 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 09:54:08,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:54:08,423 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:08,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2031815938, now seen corresponding path program 30 times [2020-10-12 09:54:08,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:08,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302412218] [2020-10-12 09:54:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:08,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:17,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:17,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 393 [2020-10-12 09:54:17,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:17,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9227 [2020-10-12 09:54:17,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:54:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-12 09:54:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:54:17,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:18,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:18,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:18,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:18,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:18,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:18,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:18,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:18,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:18,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:18,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5400 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4500 trivial. 0 not checked. [2020-10-12 09:54:18,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302412218] [2020-10-12 09:54:18,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:18,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:54:18,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8517717] [2020-10-12 09:54:18,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:54:18,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:18,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:54:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:18,422 INFO L87 Difference]: Start difference. First operand 391 states and 398 transitions. Second operand 34 states. [2020-10-12 09:54:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:19,599 INFO L93 Difference]: Finished difference Result 730 states and 748 transitions. [2020-10-12 09:54:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:54:19,599 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 385 [2020-10-12 09:54:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:19,602 INFO L225 Difference]: With dead ends: 730 [2020-10-12 09:54:19,602 INFO L226 Difference]: Without dead ends: 409 [2020-10-12 09:54:19,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-12 09:54:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 403. [2020-10-12 09:54:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-12 09:54:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 410 transitions. [2020-10-12 09:54:19,613 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 410 transitions. Word has length 385 [2020-10-12 09:54:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:19,613 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 410 transitions. [2020-10-12 09:54:19,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:54:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 410 transitions. [2020-10-12 09:54:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-12 09:54:19,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:19,617 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 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 09:54:19,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:54:19,619 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:19,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:19,619 INFO L82 PathProgramCache]: Analyzing trace with hash -604187146, now seen corresponding path program 31 times [2020-10-12 09:54:19,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:19,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802021079] [2020-10-12 09:54:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:19,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:19,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:19,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:25,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:25,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-12 09:54:25,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:25,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5767 [2020-10-12 09:54:25,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-12 09:54:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:25,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:26,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:26,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:26,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:26,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:26,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:26,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:26,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:26,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:26,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:26,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:26,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5766 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 4805 trivial. 0 not checked. [2020-10-12 09:54:26,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802021079] [2020-10-12 09:54:26,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:26,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:26,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10170447] [2020-10-12 09:54:26,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:26,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:26,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:26,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:26,186 INFO L87 Difference]: Start difference. First operand 403 states and 410 transitions. Second operand 35 states. [2020-10-12 09:54:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:27,438 INFO L93 Difference]: Finished difference Result 752 states and 770 transitions. [2020-10-12 09:54:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:27,439 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 397 [2020-10-12 09:54:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:27,442 INFO L225 Difference]: With dead ends: 752 [2020-10-12 09:54:27,442 INFO L226 Difference]: Without dead ends: 421 [2020-10-12 09:54:27,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-12 09:54:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 415. [2020-10-12 09:54:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-12 09:54:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 422 transitions. [2020-10-12 09:54:27,453 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 422 transitions. Word has length 397 [2020-10-12 09:54:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:27,453 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 422 transitions. [2020-10-12 09:54:27,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 422 transitions. [2020-10-12 09:54:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-10-12 09:54:27,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:27,457 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 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 09:54:27,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:54:27,457 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:27,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1223843606, now seen corresponding path program 32 times [2020-10-12 09:54:27,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:27,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512176797] [2020-10-12 09:54:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:27,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:27,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:27,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:27,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:36,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:36,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-12 09:54:36,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:36,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8892 [2020-10-12 09:54:36,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:54:36,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-12 09:54:36,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:54:36,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:37,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:37,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:37,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:37,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:37,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:37,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:37,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:37,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6144 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5120 trivial. 0 not checked. [2020-10-12 09:54:37,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512176797] [2020-10-12 09:54:37,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:37,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:54:37,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295825205] [2020-10-12 09:54:37,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:54:37,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:54:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:37,203 INFO L87 Difference]: Start difference. First operand 415 states and 422 transitions. Second operand 36 states. [2020-10-12 09:54:38,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:38,517 INFO L93 Difference]: Finished difference Result 774 states and 792 transitions. [2020-10-12 09:54:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:54:38,518 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 409 [2020-10-12 09:54:38,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:38,520 INFO L225 Difference]: With dead ends: 774 [2020-10-12 09:54:38,520 INFO L226 Difference]: Without dead ends: 433 [2020-10-12 09:54:38,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-12 09:54:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 427. [2020-10-12 09:54:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-12 09:54:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 434 transitions. [2020-10-12 09:54:38,535 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 434 transitions. Word has length 409 [2020-10-12 09:54:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:38,535 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 434 transitions. [2020-10-12 09:54:38,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:54:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 434 transitions. [2020-10-12 09:54:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-10-12 09:54:38,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:38,539 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 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 09:54:38,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:54:38,539 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash -872518178, now seen corresponding path program 33 times [2020-10-12 09:54:38,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:38,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571042237] [2020-10-12 09:54:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:38,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:44,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:44,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 429 [2020-10-12 09:54:44,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:44,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5453 [2020-10-12 09:54:44,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:54:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-12 09:54:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:54:44,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:44,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:44,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:44,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:44,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:44,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:44,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:44,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:44,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:44,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:44,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:44,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5445 trivial. 0 not checked. [2020-10-12 09:54:44,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571042237] [2020-10-12 09:54:44,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:44,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:54:44,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338028887] [2020-10-12 09:54:44,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:54:44,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:54:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:44,905 INFO L87 Difference]: Start difference. First operand 427 states and 434 transitions. Second operand 37 states. [2020-10-12 09:54:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:46,105 INFO L93 Difference]: Finished difference Result 796 states and 814 transitions. [2020-10-12 09:54:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:54:46,106 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 421 [2020-10-12 09:54:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:46,109 INFO L225 Difference]: With dead ends: 796 [2020-10-12 09:54:46,109 INFO L226 Difference]: Without dead ends: 445 [2020-10-12 09:54:46,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-12 09:54:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 439. [2020-10-12 09:54:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-12 09:54:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 446 transitions. [2020-10-12 09:54:46,121 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 446 transitions. Word has length 421 [2020-10-12 09:54:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:46,121 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 446 transitions. [2020-10-12 09:54:46,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:54:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 446 transitions. [2020-10-12 09:54:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-10-12 09:54:46,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:46,124 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 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 09:54:46,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:54:46,125 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:46,125 INFO L82 PathProgramCache]: Analyzing trace with hash -134202158, now seen corresponding path program 34 times [2020-10-12 09:54:46,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:46,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46018109] [2020-10-12 09:54:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:46,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:52,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:52,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 441 [2020-10-12 09:54:52,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:52,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6171 [2020-10-12 09:54:52,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:52,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:54:52,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-12 09:54:52,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:54:52,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:53,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:53,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:53,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:53,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:53,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:53,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:53,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:53,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6936 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5780 trivial. 0 not checked. [2020-10-12 09:54:53,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46018109] [2020-10-12 09:54:53,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:53,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:54:53,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743030252] [2020-10-12 09:54:53,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:54:53,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:53,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:54:53,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:53,261 INFO L87 Difference]: Start difference. First operand 439 states and 446 transitions. Second operand 38 states. [2020-10-12 09:54:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:54,646 INFO L93 Difference]: Finished difference Result 818 states and 836 transitions. [2020-10-12 09:54:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:54:54,647 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 433 [2020-10-12 09:54:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:54,650 INFO L225 Difference]: With dead ends: 818 [2020-10-12 09:54:54,650 INFO L226 Difference]: Without dead ends: 457 [2020-10-12 09:54:54,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-10-12 09:54:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2020-10-12 09:54:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-12 09:54:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 458 transitions. [2020-10-12 09:54:54,664 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 458 transitions. Word has length 433 [2020-10-12 09:54:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:54,664 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 458 transitions. [2020-10-12 09:54:54,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:54:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 458 transitions. [2020-10-12 09:54:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-12 09:54:54,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:54,669 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 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 09:54:54,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:54:54,669 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash 868486598, now seen corresponding path program 35 times [2020-10-12 09:54:54,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:54,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421185106] [2020-10-12 09:54:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:54,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking...