/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_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:58:50,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:58:50,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:58:50,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:58:50,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:58:50,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:58:50,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:58:50,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:58:50,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:58:50,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:58:50,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:58:50,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:58:50,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:58:50,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:58:50,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:58:50,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:58:50,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:58:50,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:58:50,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:58:50,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:58:50,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:58:50,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:58:50,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:58:50,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:58:50,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:58:50,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:58:50,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:58:50,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:58:50,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:58:50,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:58:50,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:58:50,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:58:50,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:58:50,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:58:50,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:58:50,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:58:50,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:58:50,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:58:50,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:58:50,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:58:50,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:58:50,478 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 09:58:50,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:58:50,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:58:50,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:58:50,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:58:50,503 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:58:50,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:58:50,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:58:50,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:58:50,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:58:50,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:58:50,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:58:50,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:58:50,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:58:50,505 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:58:50,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:58:50,505 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:58:50,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:58:50,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:58:50,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:58:50,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:58:50,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:58:50,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:58:50,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:58:50,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:58:50,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:58:50,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:58:50,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:58:50,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:58:50,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:58:50,508 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 09:58:50,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:58:50,876 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:58:50,880 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:58:50,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:58:50,886 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:58:50,887 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2020-10-12 09:58:50,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27db1cae8/3a260c34ce444fa0a7eee4e5d833b1f9/FLAG8a49a8306 [2020-10-12 09:58:51,481 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:58:51,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2020-10-12 09:58:51,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27db1cae8/3a260c34ce444fa0a7eee4e5d833b1f9/FLAG8a49a8306 [2020-10-12 09:58:51,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27db1cae8/3a260c34ce444fa0a7eee4e5d833b1f9 [2020-10-12 09:58:51,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:58:51,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:58:51,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:58:51,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:58:51,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:58:51,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:58:51" (1/1) ... [2020-10-12 09:58:51,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24493d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:51, skipping insertion in model container [2020-10-12 09:58:51,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:58:51" (1/1) ... [2020-10-12 09:58:51,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:58:51,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:58:52,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:58:52,087 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:58:52,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:58:52,129 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:58:52,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52 WrapperNode [2020-10-12 09:58:52,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:58:52,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:58:52,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:58:52,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:58:52,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (1/1) ... [2020-10-12 09:58:52,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (1/1) ... [2020-10-12 09:58:52,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (1/1) ... [2020-10-12 09:58:52,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (1/1) ... [2020-10-12 09:58:52,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (1/1) ... [2020-10-12 09:58:52,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (1/1) ... [2020-10-12 09:58:52,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (1/1) ... [2020-10-12 09:58:52,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:58:52,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:58:52,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:58:52,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:58:52,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (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 09:58:52,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:58:52,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:58:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:58:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:58:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:58:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:58:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:58:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:58:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:58:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:58:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:58:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:58:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:58:52,575 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:58:52,575 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 09:58:52,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:58:52 BoogieIcfgContainer [2020-10-12 09:58:52,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:58:52,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:58:52,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:58:52,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:58:52,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:58:51" (1/3) ... [2020-10-12 09:58:52,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af9cef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:58:52, skipping insertion in model container [2020-10-12 09:58:52,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:52" (2/3) ... [2020-10-12 09:58:52,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af9cef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:58:52, skipping insertion in model container [2020-10-12 09:58:52,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:58:52" (3/3) ... [2020-10-12 09:58:52,589 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2020-10-12 09:58:52,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:58:52,609 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:58:52,630 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:58:52,663 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:58:52,663 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:58:52,664 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:58:52,664 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:58:52,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:58:52,667 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:58:52,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:58:52,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:58:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-12 09:58:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 09:58:52,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:52,719 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] [2020-10-12 09:58:52,719 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2020-10-12 09:58:52,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:52,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535822636] [2020-10-12 09:58:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:52,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:52,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:53,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:53,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:53,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:53,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 09:58:53,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:58:53,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-12 09:58:53,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:58:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:58:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:58:53,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:58:53,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:53,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:53,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:53,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:53,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:53,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:58:53,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:53,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:58:53,744 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 09:58:53,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535822636] [2020-10-12 09:58:53,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:58:53,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:58:53,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222260722] [2020-10-12 09:58:53,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:58:53,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:53,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:58:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:58:53,791 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-10-12 09:58:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:54,070 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2020-10-12 09:58:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:58:54,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-12 09:58:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:54,095 INFO L225 Difference]: With dead ends: 60 [2020-10-12 09:58:54,096 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 09:58:54,103 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 09:58:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 09:58:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 09:58:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 09:58:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-12 09:58:54,209 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-12 09:58:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:54,210 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-12 09:58:54,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:58:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-12 09:58:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:58:54,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:54,214 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] [2020-10-12 09:58:54,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:58:54,216 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:54,216 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2020-10-12 09:58:54,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:54,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570614767] [2020-10-12 09:58:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:54,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:54,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:54,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:54,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:59,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:58:59,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:58:59,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:58:59,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:58:59,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 09:58:59,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:58:59,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:58:59,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:59,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:59,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:59,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:59,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:58:59,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:59,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:58:59,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570614767] [2020-10-12 09:58:59,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:59,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:58:59,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579056029] [2020-10-12 09:58:59,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:58:59,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:59,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:58:59,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:58:59,370 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 9 states. [2020-10-12 09:58:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:59,660 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-12 09:58:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:58:59,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-12 09:58:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:59,663 INFO L225 Difference]: With dead ends: 41 [2020-10-12 09:58:59,663 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 09:58:59,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:58:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 09:58:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-12 09:58:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 09:58:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-12 09:58:59,676 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2020-10-12 09:58:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:59,677 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-12 09:58:59,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:58:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-12 09:58:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:58:59,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:59,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:59,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:58:59,680 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1175041461, now seen corresponding path program 1 times [2020-10-12 09:58:59,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:59,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656203810] [2020-10-12 09:58:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:04,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:04,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:59:04,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:04,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:04,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:04,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:59:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:59:04,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:04,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:04,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:04,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:04,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:04,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:04,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:04,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:04,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:04,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 09:59:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:04,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:04,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:04,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:04,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:04,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 09:59:04,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:04,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:04,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:04,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:04,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:05,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656203810] [2020-10-12 09:59:05,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:05,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:59:05,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821343183] [2020-10-12 09:59:05,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:59:05,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:05,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:59:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:05,034 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 13 states. [2020-10-12 09:59:05,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:05,469 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-12 09:59:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:59:05,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 09:59:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:05,475 INFO L225 Difference]: With dead ends: 51 [2020-10-12 09:59:05,475 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 09:59:05,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:59:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 09:59:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 09:59:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:59:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-12 09:59:05,504 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2020-10-12 09:59:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:05,505 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-12 09:59:05,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:59:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-12 09:59:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:59:05,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:05,507 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-12 09:59:05,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:59:05,507 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1778939977, now seen corresponding path program 2 times [2020-10-12 09:59:05,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:05,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666417677] [2020-10-12 09:59:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:05,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:10,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:59:10,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:10,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:59:10,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:10,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:59:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:59:10,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 09:59:10,938 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2020-10-12 09:59:11,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:11,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:11,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:11,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:11,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:11,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:11,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:11,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:11,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:11,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:11,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 09:59:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:11,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:11,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:11,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:11,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:59:11,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:11,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:11,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:11,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666417677] [2020-10-12 09:59:11,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:11,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:59:11,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141640485] [2020-10-12 09:59:11,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:59:11,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:59:11,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:59:11,211 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 14 states. [2020-10-12 09:59:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:11,659 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-12 09:59:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:59:11,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-12 09:59:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:11,661 INFO L225 Difference]: With dead ends: 52 [2020-10-12 09:59:11,662 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 09:59:11,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:59:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 09:59:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 09:59:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:59:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-12 09:59:11,671 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 35 [2020-10-12 09:59:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:11,671 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-12 09:59:11,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:59:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-12 09:59:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:59:11,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:11,673 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:11,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:59:11,673 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash 975042507, now seen corresponding path program 3 times [2020-10-12 09:59:11,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:11,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171675713] [2020-10-12 09:59:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:16,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:59:16,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:16,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:16,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:16,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:59:16,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:16,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:59:16,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:17,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:17,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:17,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:17,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:17,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:17,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:17,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:17,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 09:59:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:17,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:17,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:17,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:17,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:59:17,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:17,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:17,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:17,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:17,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:17,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171675713] [2020-10-12 09:59:17,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:17,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:59:17,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913294700] [2020-10-12 09:59:17,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:59:17,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:59:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:59:17,257 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 15 states. [2020-10-12 09:59:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:17,565 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-12 09:59:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:59:17,565 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 09:59:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:17,567 INFO L225 Difference]: With dead ends: 53 [2020-10-12 09:59:17,567 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:59:17,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:59:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:59:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 09:59:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:59:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-12 09:59:17,576 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 36 [2020-10-12 09:59:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:17,576 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-12 09:59:17,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:59:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-12 09:59:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:59:17,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:17,578 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:17,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:59:17,578 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:17,579 INFO L82 PathProgramCache]: Analyzing trace with hash 449153591, now seen corresponding path program 4 times [2020-10-12 09:59:17,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:17,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145889218] [2020-10-12 09:59:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:22,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:59:22,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:22,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:22,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:59:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 09:59:22,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:23,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:23,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:23,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:23,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:23,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:23,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:23,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:23,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:23,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 09:59:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:23,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:23,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:23,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:23,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:23,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:23,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:23,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145889218] [2020-10-12 09:59:23,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:23,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:59:23,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45501801] [2020-10-12 09:59:23,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:59:23,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:23,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:59:23,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:59:23,111 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 16 states. [2020-10-12 09:59:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:23,654 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-12 09:59:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:59:23,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 09:59:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:23,656 INFO L225 Difference]: With dead ends: 54 [2020-10-12 09:59:23,656 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 09:59:23,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:59:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 09:59:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 09:59:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:59:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-12 09:59:23,666 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 37 [2020-10-12 09:59:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:23,666 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-12 09:59:23,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:59:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-12 09:59:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:59:23,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:23,668 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:23,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:59:23,668 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1326466379, now seen corresponding path program 5 times [2020-10-12 09:59:23,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:23,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774098094] [2020-10-12 09:59:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:23,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:24,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:24,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:28,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:28,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 09:59:28,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:28,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:28,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:59:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:59:28,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:29,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:29,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:29,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:29,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:29,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:29,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:29,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:29,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:29,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:29,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:29,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:29,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 09:59:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:29,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:29,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:29,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:29,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:29,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:29,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:29,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:29,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774098094] [2020-10-12 09:59:29,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:29,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:59:29,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439381547] [2020-10-12 09:59:29,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:59:29,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:29,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:59:29,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:59:29,498 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 17 states. [2020-10-12 09:59:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:30,085 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-12 09:59:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:59:30,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 09:59:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:30,086 INFO L225 Difference]: With dead ends: 55 [2020-10-12 09:59:30,087 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 09:59:30,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:59:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 09:59:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 09:59:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 09:59:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-12 09:59:30,097 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 38 [2020-10-12 09:59:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:30,097 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-12 09:59:30,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:59:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-12 09:59:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:59:30,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:30,098 INFO L422 BasicCegarLoop]: trace histogram [6, 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, 1, 1] [2020-10-12 09:59:30,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:59:30,099 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1541608265, now seen corresponding path program 6 times [2020-10-12 09:59:30,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:30,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568982568] [2020-10-12 09:59:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:35,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:59:35,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:35,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:35,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:35,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:59:35,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:35,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 09:59:35,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:35,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:35,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:35,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:35,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:35,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:35,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:35,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:35,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:35,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:35,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:35,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:59:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:35,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:35,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:35,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:35,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:35,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568982568] [2020-10-12 09:59:35,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:35,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:59:35,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022550800] [2020-10-12 09:59:35,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:59:35,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:59:35,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:59:35,604 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 18 states. [2020-10-12 09:59:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:36,103 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-12 09:59:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:59:36,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-12 09:59:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:36,105 INFO L225 Difference]: With dead ends: 56 [2020-10-12 09:59:36,105 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 09:59:36,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:59:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 09:59:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 09:59:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:59:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-12 09:59:36,114 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 39 [2020-10-12 09:59:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:36,114 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-12 09:59:36,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:59:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-12 09:59:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:59:36,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:36,116 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:36,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:59:36,116 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash -257609013, now seen corresponding path program 7 times [2020-10-12 09:59:36,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:36,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473891268] [2020-10-12 09:59:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:36,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:41,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:59:41,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:41,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:41,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:41,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:59:41,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:41,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:59:41,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:41,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:41,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:41,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:41,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:41,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:41,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:41,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:41,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 09:59:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:41,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:41,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:41,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:41,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:41,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:41,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:41,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:41,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:41,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:41,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473891268] [2020-10-12 09:59:41,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:41,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:59:41,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332356785] [2020-10-12 09:59:41,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:59:41,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:59:41,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:59:41,643 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 19 states. [2020-10-12 09:59:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:42,112 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-12 09:59:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:59:42,112 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-12 09:59:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:42,114 INFO L225 Difference]: With dead ends: 57 [2020-10-12 09:59:42,114 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:59:42,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:59:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:59:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-12 09:59:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 09:59:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-12 09:59:42,123 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 40 [2020-10-12 09:59:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:42,123 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-12 09:59:42,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:59:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-12 09:59:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:59:42,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:42,124 INFO L422 BasicCegarLoop]: trace histogram [8, 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, 1, 1] [2020-10-12 09:59:42,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:59:42,125 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 891662135, now seen corresponding path program 8 times [2020-10-12 09:59:42,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:42,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77994576] [2020-10-12 09:59:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:43,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:47,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:47,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:59:47,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:47,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:59:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 09:59:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:48,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:48,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:48,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:48,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:48,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:48,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:48,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:59:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:48,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:48,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:48,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:48,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:48,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:48,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77994576] [2020-10-12 09:59:48,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:48,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:59:48,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405172007] [2020-10-12 09:59:48,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:59:48,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:59:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:59:48,199 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 20 states. [2020-10-12 09:59:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:48,633 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-12 09:59:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:59:48,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-12 09:59:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:48,635 INFO L225 Difference]: With dead ends: 58 [2020-10-12 09:59:48,636 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 09:59:48,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:59:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 09:59:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-12 09:59:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 09:59:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-12 09:59:48,646 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 41 [2020-10-12 09:59:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:48,646 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-12 09:59:48,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:59:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-12 09:59:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:59:48,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:48,647 INFO L422 BasicCegarLoop]: trace histogram [9, 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, 1, 1] [2020-10-12 09:59:48,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:59:48,648 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:48,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2135637941, now seen corresponding path program 9 times [2020-10-12 09:59:48,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:48,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110546996] [2020-10-12 09:59:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:48,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:51,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:53,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:59:53,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:53,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:53,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:53,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:59:53,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:53,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:59:53,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:54,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:54,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:54,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:54,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:54,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:54,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:54,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:54,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:54,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:54,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:54,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:59:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:54,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:54,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:54,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:54,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:54,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:54,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:54,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:54,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:54,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:54,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110546996] [2020-10-12 09:59:54,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:54,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:59:54,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730369650] [2020-10-12 09:59:54,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:59:54,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:54,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:59:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:59:54,350 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 21 states. [2020-10-12 09:59:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:54,798 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-12 09:59:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:59:54,799 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-12 09:59:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:54,800 INFO L225 Difference]: With dead ends: 59 [2020-10-12 09:59:54,800 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:59:54,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:59:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:59:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 09:59:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 09:59:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-12 09:59:54,809 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 42 [2020-10-12 09:59:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:54,809 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-12 09:59:54,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:59:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-12 09:59:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:59:54,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:54,811 INFO L422 BasicCegarLoop]: trace histogram [10, 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, 1, 1] [2020-10-12 09:59:54,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:59:54,811 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1492659785, now seen corresponding path program 10 times [2020-10-12 09:59:54,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:54,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787667732] [2020-10-12 09:59:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:54,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:59,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:59:59,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:59,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:59,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:59,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:59:59,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:59,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:59:59,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:00,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:00,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:00,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:00,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:00,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:00,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:00,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:00,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:00,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 10:00:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:00,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:00,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:00,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:00:00,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:00,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:00,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:00,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:00,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:00,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787667732] [2020-10-12 10:00:00,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:00,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:00:00,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624524595] [2020-10-12 10:00:00,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:00:00,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:00:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:00,579 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 22 states. [2020-10-12 10:00:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:00,977 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-12 10:00:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:00:00,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-10-12 10:00:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:00,979 INFO L225 Difference]: With dead ends: 60 [2020-10-12 10:00:00,979 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:00:00,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:00:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:00:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 10:00:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:00:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-12 10:00:00,988 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 43 [2020-10-12 10:00:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:00,988 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-12 10:00:00,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:00:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-12 10:00:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:00:00,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:00,989 INFO L422 BasicCegarLoop]: trace histogram [11, 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, 1, 1] [2020-10-12 10:00:00,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:00:00,990 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:00,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1259793867, now seen corresponding path program 11 times [2020-10-12 10:00:00,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:00,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817114012] [2020-10-12 10:00:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:00,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:03,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:05,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:00:05,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:05,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:00:05,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:00:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:00:06,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:06,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:06,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:06,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:06,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:06,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:06,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:06,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:06,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:06,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:06,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:06,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 10:00:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:06,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:06,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:06,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:06,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:00:06,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:06,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:06,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:06,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:06,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:06,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817114012] [2020-10-12 10:00:06,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:06,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:00:06,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248412516] [2020-10-12 10:00:06,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:00:06,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:00:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:06,856 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 23 states. [2020-10-12 10:00:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:07,211 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-12 10:00:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:00:07,211 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-10-12 10:00:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:07,212 INFO L225 Difference]: With dead ends: 61 [2020-10-12 10:00:07,213 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 10:00:07,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:00:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 10:00:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 10:00:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 10:00:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-12 10:00:07,231 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2020-10-12 10:00:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:07,233 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-12 10:00:07,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:00:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-12 10:00:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:00:07,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:07,238 INFO L422 BasicCegarLoop]: trace histogram [12, 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, 1, 1] [2020-10-12 10:00:07,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:00:07,239 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:07,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:07,239 INFO L82 PathProgramCache]: Analyzing trace with hash 686511159, now seen corresponding path program 12 times [2020-10-12 10:00:07,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:07,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246361807] [2020-10-12 10:00:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:07,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:09,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:12,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:00:12,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:12,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:00:12,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:00:12,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:12,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:00:12,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:13,186 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-12 10:00:13,467 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2020-10-12 10:00:13,617 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2020-10-12 10:00:13,767 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2020-10-12 10:00:13,969 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-12 10:00:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:14,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:14,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:14,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:14,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:14,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:14,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:14,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:14,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:14,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:14,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:00:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:14,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:14,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:14,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:14,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:14,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:14,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:14,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:14,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246361807] [2020-10-12 10:00:14,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:14,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:00:14,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160683056] [2020-10-12 10:00:14,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:00:14,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:00:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:00:14,416 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 24 states. [2020-10-12 10:00:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:15,051 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-10-12 10:00:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:00:15,052 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-12 10:00:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:15,053 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:00:15,053 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 10:00:15,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:00:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 10:00:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-12 10:00:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 10:00:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-12 10:00:15,062 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 45 [2020-10-12 10:00:15,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:15,062 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-12 10:00:15,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:00:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-12 10:00:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:00:15,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:15,063 INFO L422 BasicCegarLoop]: trace histogram [13, 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, 1, 1] [2020-10-12 10:00:15,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:00:15,064 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 94616395, now seen corresponding path program 13 times [2020-10-12 10:00:15,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:15,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541951214] [2020-10-12 10:00:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:15,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:16,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:16,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:20,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:20,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 10:00:20,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:20,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:00:20,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:20,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:00:20,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:20,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:00:20,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:21,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:21,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:21,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:21,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:21,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:21,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:21,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:21,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:21,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:21,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:21,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 10:00:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:21,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:21,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:21,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:21,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:21,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:21,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:21,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:21,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:21,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 4 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:21,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541951214] [2020-10-12 10:00:21,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:21,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:00:21,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681538391] [2020-10-12 10:00:21,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:00:21,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:21,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:00:21,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:00:21,911 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 25 states. [2020-10-12 10:00:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:22,430 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-10-12 10:00:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:00:22,431 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-12 10:00:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:22,432 INFO L225 Difference]: With dead ends: 63 [2020-10-12 10:00:22,432 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 10:00:22,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:00:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 10:00:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-12 10:00:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 10:00:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-12 10:00:22,447 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2020-10-12 10:00:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:22,447 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-12 10:00:22,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:00:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-12 10:00:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 10:00:22,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:22,448 INFO L422 BasicCegarLoop]: trace histogram [14, 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, 1, 1] [2020-10-12 10:00:22,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:00:22,449 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1074252105, now seen corresponding path program 14 times [2020-10-12 10:00:22,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:22,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339751044] [2020-10-12 10:00:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:22,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:22,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:22,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:22,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:22,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:27,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:27,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 10:00:27,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:27,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:00:27,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:27,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:00:27,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:27,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:00:27,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:28,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:28,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:28,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:28,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:28,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:28,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:28,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:28,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:28,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 10:00:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:28,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:28,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:28,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:28,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:28,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:28,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:28,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:28,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:28,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:28,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:28,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339751044] [2020-10-12 10:00:28,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:28,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:00:28,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767211893] [2020-10-12 10:00:28,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:00:28,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:28,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:00:28,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:00:28,632 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 26 states. [2020-10-12 10:00:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:29,113 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-12 10:00:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:00:29,115 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 47 [2020-10-12 10:00:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:29,116 INFO L225 Difference]: With dead ends: 64 [2020-10-12 10:00:29,116 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 10:00:29,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:00:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 10:00:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-12 10:00:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:00:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-12 10:00:29,125 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 47 [2020-10-12 10:00:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:29,126 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-12 10:00:29,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:00:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-12 10:00:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:00:29,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:29,127 INFO L422 BasicCegarLoop]: trace histogram [15, 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, 1, 1] [2020-10-12 10:00:29,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:00:29,127 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:29,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:29,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1345530059, now seen corresponding path program 15 times [2020-10-12 10:00:29,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:29,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882060939] [2020-10-12 10:00:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:29,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:34,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:34,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:00:34,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:34,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:00:34,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:00:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:00:34,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:35,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:35,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:35,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:35,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:35,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:35,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:35,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:00:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:35,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:35,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:35,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:35,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:35,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 4 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:35,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882060939] [2020-10-12 10:00:35,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:35,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:00:35,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443288615] [2020-10-12 10:00:35,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:00:35,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:35,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:00:35,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:00:35,596 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 27 states. [2020-10-12 10:00:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:36,068 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-10-12 10:00:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:00:36,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2020-10-12 10:00:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:36,070 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:00:36,070 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 10:00:36,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:00:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 10:00:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 10:00:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 10:00:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-12 10:00:36,080 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 48 [2020-10-12 10:00:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:36,081 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-12 10:00:36,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:00:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-12 10:00:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:00:36,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:36,082 INFO L422 BasicCegarLoop]: trace histogram [16, 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, 1, 1] [2020-10-12 10:00:36,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:00:36,083 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash -950634185, now seen corresponding path program 16 times [2020-10-12 10:00:36,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:36,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903885305] [2020-10-12 10:00:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:36,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:39,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:41,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:41,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 10:00:41,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:41,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:00:41,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:00:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:00:41,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:43,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:43,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:43,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:43,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:00:43,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:43,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:43,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:43,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:43,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 10:00:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:43,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:43,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:43,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:43,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903885305] [2020-10-12 10:00:43,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:43,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:00:43,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116620336] [2020-10-12 10:00:43,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:00:43,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:00:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:00:43,420 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 28 states. [2020-10-12 10:00:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:44,088 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-12 10:00:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:00:44,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 49 [2020-10-12 10:00:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:44,089 INFO L225 Difference]: With dead ends: 66 [2020-10-12 10:00:44,089 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 10:00:44,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=403, Invalid=857, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:00:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 10:00:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 10:00:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 10:00:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-12 10:00:44,107 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 49 [2020-10-12 10:00:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:44,107 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-12 10:00:44,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:00:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-12 10:00:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:00:44,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:44,108 INFO L422 BasicCegarLoop]: trace histogram [17, 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, 1, 1] [2020-10-12 10:00:44,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:00:44,109 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash 882718283, now seen corresponding path program 17 times [2020-10-12 10:00:44,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:44,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145097077] [2020-10-12 10:00:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:44,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:45,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:47,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:49,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 10:00:49,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:00:49,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:00:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:00:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:50,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:50,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:50,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:50,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:00:50,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:50,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:50,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:50,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:50,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:50,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:00:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:50,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:50,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:50,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:50,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:50,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:50,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:50,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145097077] [2020-10-12 10:00:50,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:50,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:00:50,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100933607] [2020-10-12 10:00:50,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:00:50,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:00:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:00:50,784 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 29 states. [2020-10-12 10:00:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:51,368 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-10-12 10:00:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:00:51,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 50 [2020-10-12 10:00:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:51,369 INFO L225 Difference]: With dead ends: 67 [2020-10-12 10:00:51,370 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 10:00:51,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:00:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 10:00:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 10:00:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 10:00:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-12 10:00:51,377 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 50 [2020-10-12 10:00:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:51,377 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-12 10:00:51,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:00:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-12 10:00:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:00:51,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:51,378 INFO L422 BasicCegarLoop]: trace histogram [18, 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, 1, 1] [2020-10-12 10:00:51,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:00:51,378 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1882069943, now seen corresponding path program 18 times [2020-10-12 10:00:51,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:51,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110908435] [2020-10-12 10:00:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:51,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:51,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:51,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:51,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:56,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:56,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:00:56,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:56,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:00:56,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:00:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:00:56,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:58,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:58,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:58,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:58,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:58,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:58,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:00:58,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:58,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:58,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:00:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:58,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:58,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:58,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:58,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:58,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:58,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 4 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:58,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110908435] [2020-10-12 10:00:58,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:58,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:00:58,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570501996] [2020-10-12 10:00:58,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:00:58,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:58,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:00:58,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=564, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:00:58,714 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 30 states. [2020-10-12 10:00:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:59,433 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-12 10:00:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:00:59,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 51 [2020-10-12 10:00:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:59,435 INFO L225 Difference]: With dead ends: 68 [2020-10-12 10:00:59,435 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 10:00:59,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:00:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 10:00:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 10:00:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 10:00:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-12 10:00:59,443 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 51 [2020-10-12 10:00:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:59,443 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-12 10:00:59,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:00:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-12 10:00:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:00:59,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:59,444 INFO L422 BasicCegarLoop]: trace histogram [19, 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, 1, 1] [2020-10-12 10:00:59,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:00:59,444 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1497766965, now seen corresponding path program 19 times [2020-10-12 10:00:59,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:59,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708289058] [2020-10-12 10:00:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:59,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:03,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:04,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:04,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:01:04,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:01:04,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:01:04,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:01:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:01:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:06,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:06,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:06,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:06,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:06,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:06,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:06,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:06,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 10:01:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:06,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:01:06,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:06,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:01:06,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:01:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:01:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:01:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 4 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:01:06,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708289058] [2020-10-12 10:01:06,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:06,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:01:06,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453107855] [2020-10-12 10:01:06,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:01:06,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:06,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:01:06,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=599, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:06,243 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 31 states. [2020-10-12 10:01:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:06,843 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-12 10:01:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:01:06,843 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 52 [2020-10-12 10:01:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:06,844 INFO L225 Difference]: With dead ends: 69 [2020-10-12 10:01:06,844 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 10:01:06,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=493, Invalid=989, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:01:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 10:01:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 10:01:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 10:01:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-12 10:01:06,852 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 52 [2020-10-12 10:01:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:06,852 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-12 10:01:06,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:01:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-12 10:01:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 10:01:06,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:06,853 INFO L422 BasicCegarLoop]: trace histogram [20, 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, 1, 1] [2020-10-12 10:01:06,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:01:06,853 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:06,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1101471287, now seen corresponding path program 20 times [2020-10-12 10:01:06,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:06,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910950015] [2020-10-12 10:01:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:08,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:09,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:11,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:01:11,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:01:11,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:01:11,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:11,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:01:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:01:11,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:12,631 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-10-12 10:01:12,773 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2020-10-12 10:01:12,926 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-10-12 10:01:13,089 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-12 10:01:13,255 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-10-12 10:01:13,545 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2020-10-12 10:01:13,839 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2020-10-12 10:01:13,996 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-10-12 10:01:14,166 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-10-12 10:01:14,342 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-10-12 10:01:14,534 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2020-10-12 10:01:14,730 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 29 [2020-10-12 10:01:14,942 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-10-12 10:01:15,148 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2020-10-12 10:01:15,332 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2020-10-12 10:01:15,511 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 24 [2020-10-12 10:01:15,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:15,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:15,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:15,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:15,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:15,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:15,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:15,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:15,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 10:01:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:15,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:15,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:15,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:01:15,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:15,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:01:15,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:15,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:01:15,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:01:15,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:01:15,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:01:15,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910950015] [2020-10-12 10:01:15,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:15,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:01:15,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364471520] [2020-10-12 10:01:15,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:01:15,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:15,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:01:15,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=635, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:15,770 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 32 states. [2020-10-12 10:01:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:16,558 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-12 10:01:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:01:16,561 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 53 [2020-10-12 10:01:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:16,562 INFO L225 Difference]: With dead ends: 70 [2020-10-12 10:01:16,562 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 10:01:16,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:01:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 10:01:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 10:01:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:01:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-12 10:01:16,570 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 53 [2020-10-12 10:01:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:16,570 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-12 10:01:16,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:01:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-12 10:01:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:01:16,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:16,571 INFO L422 BasicCegarLoop]: trace histogram [21, 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, 1, 1] [2020-10-12 10:01:16,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:01:16,572 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash 73478475, now seen corresponding path program 21 times [2020-10-12 10:01:16,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:16,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492946266] [2020-10-12 10:01:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:16,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:16,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:16,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:21,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:21,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:01:21,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:01:21,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:01:21,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:21,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:01:21,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:21,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:01:21,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:23,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:23,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:23,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:23,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:23,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:23,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:23,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:23,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:23,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:23,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:01:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:23,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:23,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:01:23,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:23,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:23,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:23,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:01:23,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:01:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:01:23,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:01:23,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492946266] [2020-10-12 10:01:23,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:23,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:01:23,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803263523] [2020-10-12 10:01:23,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:01:23,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:23,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:01:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=672, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:01:23,616 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 33 states. [2020-10-12 10:01:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:24,222 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-10-12 10:01:24,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:01:24,222 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 54 [2020-10-12 10:01:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:24,223 INFO L225 Difference]: With dead ends: 71 [2020-10-12 10:01:24,223 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:01:24,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=558, Invalid=1082, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:01:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:01:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 10:01:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:01:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-12 10:01:24,232 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 54 [2020-10-12 10:01:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:24,232 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-12 10:01:24,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:01:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-12 10:01:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 10:01:24,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:24,233 INFO L422 BasicCegarLoop]: trace histogram [22, 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, 1, 1] [2020-10-12 10:01:24,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:01:24,233 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1729527625, now seen corresponding path program 22 times [2020-10-12 10:01:24,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:24,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197213788] [2020-10-12 10:01:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:24,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:26,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:29,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 10:01:29,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:01:29,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:01:29,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:01:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:01:29,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:31,191 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2020-10-12 10:01:32,021 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 27 [2020-10-12 10:01:32,213 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 27 [2020-10-12 10:01:32,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:32,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:32,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:32,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:32,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:32,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:32,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:32,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:32,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 10:01:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:32,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:32,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:32,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:01:32,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:32,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:01:32,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:32,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:01:32,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:01:32,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:01:32,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 4 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:01:32,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197213788] [2020-10-12 10:01:32,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:32,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:01:32,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67072456] [2020-10-12 10:01:32,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:01:32,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:01:32,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:01:32,816 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 34 states. [2020-10-12 10:01:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:33,459 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-10-12 10:01:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:01:33,467 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 55 [2020-10-12 10:01:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:33,468 INFO L225 Difference]: With dead ends: 72 [2020-10-12 10:01:33,468 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 10:01:33,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=592, Invalid=1130, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:01:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 10:01:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 10:01:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 10:01:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-12 10:01:33,475 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 55 [2020-10-12 10:01:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:33,475 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-12 10:01:33,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:01:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-12 10:01:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:01:33,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:33,476 INFO L422 BasicCegarLoop]: trace histogram [23, 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, 1, 1] [2020-10-12 10:01:33,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:01:33,476 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1788141877, now seen corresponding path program 23 times [2020-10-12 10:01:33,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:33,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279175185] [2020-10-12 10:01:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:33,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:33,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:33,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:33,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:33,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:34,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:38,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:38,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:01:38,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:01:38,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:01:38,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:01:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 10:01:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:01:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:40,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:40,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:40,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:40,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:40,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:40,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:40,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:40,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:40,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:40,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:01:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:40,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:40,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:40,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:01:40,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:40,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:01:40,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:40,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:01:40,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:01:40,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:01:40,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 4 proven. 279 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:01:40,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279175185] [2020-10-12 10:01:40,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:40,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:01:40,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015647916] [2020-10-12 10:01:40,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:01:40,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:40,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:01:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=709, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:01:40,760 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 34 states. [2020-10-12 10:01:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:41,581 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2020-10-12 10:01:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:01:41,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-10-12 10:01:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:41,585 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:01:41,585 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 10:01:41,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=566, Invalid=1074, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:01:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 10:01:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-12 10:01:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:01:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-12 10:01:41,595 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 56 [2020-10-12 10:01:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:41,595 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-12 10:01:41,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:01:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-12 10:01:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:01:41,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:41,596 INFO L422 BasicCegarLoop]: trace histogram [24, 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, 1, 1] [2020-10-12 10:01:41,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:01:41,596 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash 689783607, now seen corresponding path program 24 times [2020-10-12 10:01:41,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:41,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593338655] [2020-10-12 10:01:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:41,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:45,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:46,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:46,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:46,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:01:46,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:01:46,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:01:46,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:46,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:01:46,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 10:01:46,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:01:46,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:48,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:48,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:48,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:48,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:48,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:48,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:48,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:01:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:48,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:48,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:01:48,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:48,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:01:48,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:48,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:01:48,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:01:48,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:01:48,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 4 proven. 303 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:01:49,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593338655] [2020-10-12 10:01:49,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:49,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:01:49,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418216522] [2020-10-12 10:01:49,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:01:49,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:49,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:01:49,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=748, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:01:49,054 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 35 states. [2020-10-12 10:01:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:49,894 INFO L93 Difference]: Finished difference Result 100 states and 131 transitions. [2020-10-12 10:01:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:01:49,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 57 [2020-10-12 10:01:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:49,896 INFO L225 Difference]: With dead ends: 100 [2020-10-12 10:01:49,896 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 10:01:49,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=600, Invalid=1122, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:01:49,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 10:01:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2020-10-12 10:01:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:01:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-12 10:01:49,907 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 57 [2020-10-12 10:01:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:49,907 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-12 10:01:49,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:01:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-12 10:01:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:01:49,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:49,908 INFO L422 BasicCegarLoop]: trace histogram [25, 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, 1, 1] [2020-10-12 10:01:49,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:01:49,908 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash 196062283, now seen corresponding path program 25 times [2020-10-12 10:01:49,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:49,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131802203] [2020-10-12 10:01:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:49,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:54,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:01:54,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:54,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:01:54,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:01:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:01:54,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:57,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:57,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:57,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:57,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:57,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:57,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:57,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:57,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:01:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:57,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:57,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:57,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:01:57,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:57,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:01:57,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:01:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:01:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:01:57,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 4 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:01:57,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131802203] [2020-10-12 10:01:57,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:57,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:01:57,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956961255] [2020-10-12 10:01:57,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:01:57,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:01:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=830, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:01:57,750 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 37 states. [2020-10-12 10:01:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:58,438 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-10-12 10:01:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:01:58,439 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 58 [2020-10-12 10:01:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:58,439 INFO L225 Difference]: With dead ends: 75 [2020-10-12 10:01:58,440 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 10:01:58,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=700, Invalid=1280, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:01:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 10:01:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 10:01:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:01:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-12 10:01:58,449 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 58 [2020-10-12 10:01:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:58,449 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-12 10:01:58,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:01:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-12 10:01:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 10:01:58,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:58,450 INFO L422 BasicCegarLoop]: trace histogram [26, 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, 1, 1] [2020-10-12 10:01:58,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:01:58,451 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:58,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2070570423, now seen corresponding path program 26 times [2020-10-12 10:01:58,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:58,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913516340] [2020-10-12 10:01:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:58,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:58,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:03,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 10:02:03,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:03,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:02:03,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:03,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:02:03,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 10:02:03,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:02:03,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:03,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:03,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:03,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:03,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:03,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:03,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:03,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:03,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:03,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:03,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:03,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 10:02:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:03,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:03,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:02:03,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:03,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:03,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:02:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:03,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 2 proven. 351 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:02:03,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913516340] [2020-10-12 10:02:03,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:03,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:02:03,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370849356] [2020-10-12 10:02:03,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:02:03,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:03,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:02:03,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:02:03,993 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 30 states. [2020-10-12 10:02:04,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:04,679 INFO L93 Difference]: Finished difference Result 221 states and 335 transitions. [2020-10-12 10:02:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:02:04,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-10-12 10:02:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:04,681 INFO L225 Difference]: With dead ends: 221 [2020-10-12 10:02:04,681 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 10:02:04,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:02:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 10:02:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-12 10:02:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-12 10:02:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 172 transitions. [2020-10-12 10:02:04,711 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 172 transitions. Word has length 59 [2020-10-12 10:02:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:04,711 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 172 transitions. [2020-10-12 10:02:04,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:02:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 172 transitions. [2020-10-12 10:02:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-12 10:02:04,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:04,713 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:04,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:02:04,713 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash 461442187, now seen corresponding path program 27 times [2020-10-12 10:02:04,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:04,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868273181] [2020-10-12 10:02:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:04,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:04,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:05,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:09,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 10:02:09,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:09,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:02:09,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:02:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:02:09,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:10,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:10,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:10,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:10,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:10,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:10,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:10,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:10,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:10,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:10,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:10,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:10,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-12 10:02:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:10,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:10,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:10,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:02:10,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:10,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:02:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 2 proven. 378 refuted. 0 times theorem prover too weak. 1514 trivial. 0 not checked. [2020-10-12 10:02:10,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868273181] [2020-10-12 10:02:10,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:10,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:02:10,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284591003] [2020-10-12 10:02:10,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:02:10,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:10,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:02:10,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:02:10,328 INFO L87 Difference]: Start difference. First operand 167 states and 172 transitions. Second operand 31 states. [2020-10-12 10:02:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:10,821 INFO L93 Difference]: Finished difference Result 305 states and 319 transitions. [2020-10-12 10:02:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:02:10,822 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 164 [2020-10-12 10:02:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:10,824 INFO L225 Difference]: With dead ends: 305 [2020-10-12 10:02:10,824 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 10:02:10,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 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 10:02:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 10:02:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-12 10:02:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 10:02:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2020-10-12 10:02:10,853 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 164 [2020-10-12 10:02:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:10,854 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2020-10-12 10:02:10,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:02:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2020-10-12 10:02:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-12 10:02:10,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:10,855 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:10,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:02:10,856 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1042968441, now seen corresponding path program 28 times [2020-10-12 10:02:10,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:10,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590979616] [2020-10-12 10:02:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:10,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:11,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:11,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:15,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-12 10:02:15,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:02:15,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:02:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:02:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:16,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:16,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:16,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:16,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:16,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:16,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:16,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:16,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:16,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:16,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:16,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:16,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-12 10:02:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:16,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:16,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:16,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:02:16,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:16,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:02:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2020-10-12 10:02:16,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590979616] [2020-10-12 10:02:16,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:16,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:02:16,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638646105] [2020-10-12 10:02:16,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:02:16,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:16,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:02:16,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:02:16,516 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand 32 states. [2020-10-12 10:02:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:17,088 INFO L93 Difference]: Finished difference Result 314 states and 328 transitions. [2020-10-12 10:02:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:02:17,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 169 [2020-10-12 10:02:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:17,091 INFO L225 Difference]: With dead ends: 314 [2020-10-12 10:02:17,092 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 10:02:17,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 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 10:02:17,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 10:02:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-12 10:02:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 10:02:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 182 transitions. [2020-10-12 10:02:17,119 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 182 transitions. Word has length 169 [2020-10-12 10:02:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:17,119 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 182 transitions. [2020-10-12 10:02:17,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:02:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 182 transitions. [2020-10-12 10:02:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-12 10:02:17,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:17,121 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:17,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:02:17,121 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:17,121 INFO L82 PathProgramCache]: Analyzing trace with hash 15374283, now seen corresponding path program 29 times [2020-10-12 10:02:17,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:17,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056094489] [2020-10-12 10:02:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:17,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:17,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:17,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:22,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-12 10:02:22,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:22,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:02:22,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:02:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-12 10:02:22,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:02:22,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:22,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:22,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:22,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:22,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:22,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:22,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:22,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:22,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:22,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:22,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:22,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-10-12 10:02:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:22,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:22,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:02:22,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:22,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:22,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:22,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:02:22,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:22,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 2 proven. 435 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2020-10-12 10:02:22,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056094489] [2020-10-12 10:02:22,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:22,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:02:22,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681636476] [2020-10-12 10:02:22,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:02:22,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:22,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:02:22,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:02:22,814 INFO L87 Difference]: Start difference. First operand 177 states and 182 transitions. Second operand 33 states. [2020-10-12 10:02:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:23,322 INFO L93 Difference]: Finished difference Result 323 states and 337 transitions. [2020-10-12 10:02:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:02:23,323 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 174 [2020-10-12 10:02:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:23,325 INFO L225 Difference]: With dead ends: 323 [2020-10-12 10:02:23,325 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 10:02:23,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 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 10:02:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 10:02:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-12 10:02:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 10:02:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 187 transitions. [2020-10-12 10:02:23,350 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 187 transitions. Word has length 174 [2020-10-12 10:02:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:23,350 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 187 transitions. [2020-10-12 10:02:23,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:02:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 187 transitions. [2020-10-12 10:02:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-12 10:02:23,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:23,351 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:23,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:02:23,352 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:23,352 INFO L82 PathProgramCache]: Analyzing trace with hash 846015161, now seen corresponding path program 30 times [2020-10-12 10:02:23,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:23,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364178447] [2020-10-12 10:02:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:23,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:23,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:23,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:28,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-12 10:02:28,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:28,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 10:02:28,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:02:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 10:02:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:02:28,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:29,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:29,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:29,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:29,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:29,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:29,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:29,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:29,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:29,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:29,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-12 10:02:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:29,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:02:29,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:29,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:29,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:02:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:29,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2329 backedges. 2 proven. 465 refuted. 0 times theorem prover too weak. 1862 trivial. 0 not checked. [2020-10-12 10:02:29,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364178447] [2020-10-12 10:02:29,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:29,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:02:29,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490415183] [2020-10-12 10:02:29,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:02:29,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:29,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:02:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:29,063 INFO L87 Difference]: Start difference. First operand 182 states and 187 transitions. Second operand 34 states. [2020-10-12 10:02:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:29,658 INFO L93 Difference]: Finished difference Result 332 states and 346 transitions. [2020-10-12 10:02:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:02:29,658 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 179 [2020-10-12 10:02:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:29,660 INFO L225 Difference]: With dead ends: 332 [2020-10-12 10:02:29,660 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 10:02:29,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 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 10:02:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 10:02:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-12 10:02:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 10:02:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 192 transitions. [2020-10-12 10:02:29,684 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 192 transitions. Word has length 179 [2020-10-12 10:02:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:29,684 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 192 transitions. [2020-10-12 10:02:29,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:02:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 192 transitions. [2020-10-12 10:02:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-12 10:02:29,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:29,686 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:29,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:02:29,686 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:29,686 INFO L82 PathProgramCache]: Analyzing trace with hash -660008181, now seen corresponding path program 31 times [2020-10-12 10:02:29,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:29,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227581905] [2020-10-12 10:02:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:34,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:34,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-12 10:02:34,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:34,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:02:34,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:34,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:02:34,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 10:02:34,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:02:34,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:35,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:35,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:35,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:35,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:35,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:35,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:35,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-10-12 10:02:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:35,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:35,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:02:35,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:35,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:35,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:35,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:35,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:02:35,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:35,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 1986 trivial. 0 not checked. [2020-10-12 10:02:35,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227581905] [2020-10-12 10:02:35,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:35,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:02:35,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108081268] [2020-10-12 10:02:35,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:02:35,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:02:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:35,446 INFO L87 Difference]: Start difference. First operand 187 states and 192 transitions. Second operand 35 states. [2020-10-12 10:02:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:36,171 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2020-10-12 10:02:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:02:36,172 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 184 [2020-10-12 10:02:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:36,173 INFO L225 Difference]: With dead ends: 341 [2020-10-12 10:02:36,173 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 10:02:36,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 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 10:02:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 10:02:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-12 10:02:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 10:02:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-10-12 10:02:36,209 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 184 [2020-10-12 10:02:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:36,209 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-10-12 10:02:36,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:02:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-10-12 10:02:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-12 10:02:36,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:36,211 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:36,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:02:36,211 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2098186759, now seen corresponding path program 32 times [2020-10-12 10:02:36,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:36,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783273862] [2020-10-12 10:02:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:36,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking...