/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=NARROWEST --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/systemc/mem_slave_tlm.1.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:41:08,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:41:08,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:41:08,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:41:08,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:41:08,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:41:08,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:41:08,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:41:08,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:41:08,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:41:08,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:41:08,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:41:08,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:41:08,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:41:08,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:41:08,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:41:08,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:41:08,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:41:08,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:41:08,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:41:08,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:41:08,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:41:08,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:41:08,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:41:08,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:41:08,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:41:08,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:41:08,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:41:08,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:41:08,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:41:08,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:41:08,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:41:08,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:41:08,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:41:08,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:41:08,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:41:08,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:41:08,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:41:08,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:41:08,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:41:08,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:41:08,538 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 [2020-10-13 15:41:08,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:41:08,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:41:08,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:41:08,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:41:08,585 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:41:08,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:41:08,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:41:08,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:41:08,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:41:08,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:41:08,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:41:08,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:41:08,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:41:08,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:41:08,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:41:08,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:41:08,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:41:08,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:41:08,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:41:08,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:41:08,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:41:08,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:41:08,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:41:08,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:41:08,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:41:08,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:41:08,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:41:08,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:41:08,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:41:08,591 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 15:41:08,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:41:08,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:41:08,966 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:41:08,968 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:41:08,969 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:41:08,969 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.1.cil.c [2020-10-13 15:41:09,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16059a65c/606387cd89214efda1fe9fdda6edfa75/FLAG2f8516d40 [2020-10-13 15:41:09,532 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:41:09,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.1.cil.c [2020-10-13 15:41:09,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16059a65c/606387cd89214efda1fe9fdda6edfa75/FLAG2f8516d40 [2020-10-13 15:41:09,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16059a65c/606387cd89214efda1fe9fdda6edfa75 [2020-10-13 15:41:09,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:41:09,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:41:09,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:41:09,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:41:09,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:41:09,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:41:09" (1/1) ... [2020-10-13 15:41:09,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e2f0c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:09, skipping insertion in model container [2020-10-13 15:41:09,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:41:09" (1/1) ... [2020-10-13 15:41:09,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:41:09,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:41:10,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:41:10,354 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:41:10,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:41:10,579 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:41:10,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10 WrapperNode [2020-10-13 15:41:10,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:41:10,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:41:10,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:41:10,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:41:10,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (1/1) ... [2020-10-13 15:41:10,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (1/1) ... [2020-10-13 15:41:10,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (1/1) ... [2020-10-13 15:41:10,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (1/1) ... [2020-10-13 15:41:10,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (1/1) ... [2020-10-13 15:41:10,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (1/1) ... [2020-10-13 15:41:10,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (1/1) ... [2020-10-13 15:41:10,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:41:10,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:41:10,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:41:10,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:41:10,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (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 [2020-10-13 15:41:10,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:41:10,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:41:10,744 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-13 15:41:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-13 15:41:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-13 15:41:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-13 15:41:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-13 15:41:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-13 15:41:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-13 15:41:10,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:41:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:41:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 15:41:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-13 15:41:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-13 15:41:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-13 15:41:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-13 15:41:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-13 15:41:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-13 15:41:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-13 15:41:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:41:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:41:10,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:41:11,802 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:41:11,802 INFO L295 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-13 15:41:11,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:41:11 BoogieIcfgContainer [2020-10-13 15:41:11,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:41:11,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:41:11,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:41:11,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:41:11,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:41:09" (1/3) ... [2020-10-13 15:41:11,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72eb4d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:41:11, skipping insertion in model container [2020-10-13 15:41:11,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:10" (2/3) ... [2020-10-13 15:41:11,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72eb4d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:41:11, skipping insertion in model container [2020-10-13 15:41:11,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:41:11" (3/3) ... [2020-10-13 15:41:11,827 INFO L109 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.1.cil.c [2020-10-13 15:41:11,845 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:41:11,858 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:41:11,872 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:41:11,899 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:41:11,900 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:41:11,900 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:41:11,900 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:41:11,900 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:41:11,901 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:41:11,901 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:41:11,901 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:41:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-10-13 15:41:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 15:41:11,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:11,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:11,942 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:11,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1545125351, now seen corresponding path program 1 times [2020-10-13 15:41:11,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:11,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676276787] [2020-10-13 15:41:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:12,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:12,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:12,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:12,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:13,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:13,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:13,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:14,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:15,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:16,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:16,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:17,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:17,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 15:41:17,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:41:17,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:41:17,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:17,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 15:41:17,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:17,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 15:41:17,530 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:41:17,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:17,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:17,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:17,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:17,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:17,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:41:17,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:17,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:17,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:17,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:17,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:17,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676276787] [2020-10-13 15:41:17,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:17,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 15:41:17,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314768874] [2020-10-13 15:41:17,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 15:41:17,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:17,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 15:41:17,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 15:41:17,599 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-10-13 15:41:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:18,844 INFO L93 Difference]: Finished difference Result 619 states and 1099 transitions. [2020-10-13 15:41:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 15:41:18,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-10-13 15:41:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:18,863 INFO L225 Difference]: With dead ends: 619 [2020-10-13 15:41:18,864 INFO L226 Difference]: Without dead ends: 340 [2020-10-13 15:41:18,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 15:41:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-13 15:41:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 289. [2020-10-13 15:41:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-13 15:41:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 484 transitions. [2020-10-13 15:41:18,949 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 484 transitions. Word has length 39 [2020-10-13 15:41:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:18,949 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 484 transitions. [2020-10-13 15:41:18,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 15:41:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 484 transitions. [2020-10-13 15:41:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 15:41:18,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:18,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:18,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:41:18,954 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash -12354039, now seen corresponding path program 1 times [2020-10-13 15:41:18,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:18,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182011163] [2020-10-13 15:41:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:20,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:20,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:20,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:21,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:23,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:23,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 15:41:23,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:41:23,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:41:23,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 15:41:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:41:23,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:24,161 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:41:24,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:24,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:24,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:24,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:24,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:24,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:41:24,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:24,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:24,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:24,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:24,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 15:41:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:24,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182011163] [2020-10-13 15:41:24,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:24,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:24,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616332238] [2020-10-13 15:41:24,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:24,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:24,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:24,205 INFO L87 Difference]: Start difference. First operand 289 states and 484 transitions. Second operand 4 states. [2020-10-13 15:41:24,491 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:41:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:26,294 INFO L93 Difference]: Finished difference Result 848 states and 1389 transitions. [2020-10-13 15:41:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:26,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-13 15:41:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:26,304 INFO L225 Difference]: With dead ends: 848 [2020-10-13 15:41:26,304 INFO L226 Difference]: Without dead ends: 585 [2020-10-13 15:41:26,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-13 15:41:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 518. [2020-10-13 15:41:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-10-13 15:41:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 844 transitions. [2020-10-13 15:41:26,370 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 844 transitions. Word has length 40 [2020-10-13 15:41:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:26,373 INFO L479 AbstractCegarLoop]: Abstraction has 518 states and 844 transitions. [2020-10-13 15:41:26,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 844 transitions. [2020-10-13 15:41:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 15:41:26,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:26,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:26,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:41:26,379 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:26,379 INFO L82 PathProgramCache]: Analyzing trace with hash 870065496, now seen corresponding path program 1 times [2020-10-13 15:41:26,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:26,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620863668] [2020-10-13 15:41:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:26,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:26,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:26,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:26,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:26,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:26,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:27,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:27,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:29,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 15:41:29,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 15:41:29,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2610 [2020-10-13 15:41:29,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 15:41:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 15:41:29,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:29,184 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:41:29,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:29,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:29,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:29,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:41:29,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:29,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:29,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620863668] [2020-10-13 15:41:29,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:29,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:29,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933362854] [2020-10-13 15:41:29,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:29,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:29,206 INFO L87 Difference]: Start difference. First operand 518 states and 844 transitions. Second operand 4 states. [2020-10-13 15:41:29,335 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:41:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:31,046 INFO L93 Difference]: Finished difference Result 1504 states and 2449 transitions. [2020-10-13 15:41:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:31,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-13 15:41:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:31,056 INFO L225 Difference]: With dead ends: 1504 [2020-10-13 15:41:31,056 INFO L226 Difference]: Without dead ends: 1019 [2020-10-13 15:41:31,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2020-10-13 15:41:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 924. [2020-10-13 15:41:31,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2020-10-13 15:41:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1525 transitions. [2020-10-13 15:41:31,147 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1525 transitions. Word has length 41 [2020-10-13 15:41:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:31,148 INFO L479 AbstractCegarLoop]: Abstraction has 924 states and 1525 transitions. [2020-10-13 15:41:31,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1525 transitions. [2020-10-13 15:41:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 15:41:31,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:31,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:31,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:41:31,153 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash 977389863, now seen corresponding path program 1 times [2020-10-13 15:41:31,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:31,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575881623] [2020-10-13 15:41:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:31,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:31,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:33,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:33,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 15:41:33,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:41:33,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2052 [2020-10-13 15:41:33,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:41:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:41:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 15:41:33,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:33,410 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:41:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:33,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:33,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:33,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:33,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:33,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:41:33,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:33,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:33,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:33,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:33,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:33,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575881623] [2020-10-13 15:41:33,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:33,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:33,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54834522] [2020-10-13 15:41:33,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:33,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:33,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:33,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:33,429 INFO L87 Difference]: Start difference. First operand 924 states and 1525 transitions. Second operand 4 states. [2020-10-13 15:41:33,563 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:41:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:35,362 INFO L93 Difference]: Finished difference Result 2207 states and 3609 transitions. [2020-10-13 15:41:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:35,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-13 15:41:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:35,379 INFO L225 Difference]: With dead ends: 2207 [2020-10-13 15:41:35,380 INFO L226 Difference]: Without dead ends: 1296 [2020-10-13 15:41:35,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2020-10-13 15:41:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1160. [2020-10-13 15:41:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-10-13 15:41:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1823 transitions. [2020-10-13 15:41:35,482 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1823 transitions. Word has length 42 [2020-10-13 15:41:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:35,484 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1823 transitions. [2020-10-13 15:41:35,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1823 transitions. [2020-10-13 15:41:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 15:41:35,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:35,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:35,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:41:35,488 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:35,488 INFO L82 PathProgramCache]: Analyzing trace with hash -552063609, now seen corresponding path program 1 times [2020-10-13 15:41:35,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:35,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616659868] [2020-10-13 15:41:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:35,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:35,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:36,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 15:41:36,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:41:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-13 15:41:36,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 15:41:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:41:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 15:41:36,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:36,351 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:41:36,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:36,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:36,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:36,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:36,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:41:36,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:36,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616659868] [2020-10-13 15:41:36,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:36,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:36,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641403377] [2020-10-13 15:41:36,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:36,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:36,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:36,388 INFO L87 Difference]: Start difference. First operand 1160 states and 1823 transitions. Second operand 4 states. [2020-10-13 15:41:36,521 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:41:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:38,073 INFO L93 Difference]: Finished difference Result 3037 states and 4837 transitions. [2020-10-13 15:41:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:38,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-13 15:41:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:38,088 INFO L225 Difference]: With dead ends: 3037 [2020-10-13 15:41:38,089 INFO L226 Difference]: Without dead ends: 1908 [2020-10-13 15:41:38,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-10-13 15:41:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1729. [2020-10-13 15:41:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1729 states. [2020-10-13 15:41:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2750 transitions. [2020-10-13 15:41:38,291 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2750 transitions. Word has length 50 [2020-10-13 15:41:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:38,291 INFO L479 AbstractCegarLoop]: Abstraction has 1729 states and 2750 transitions. [2020-10-13 15:41:38,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2750 transitions. [2020-10-13 15:41:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 15:41:38,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:38,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-13 15:41:38,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:41:38,301 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash -187867522, now seen corresponding path program 1 times [2020-10-13 15:41:38,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:38,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399292096] [2020-10-13 15:41:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:38,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:38,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:38,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:38,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:38,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:40,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:40,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:40,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:40,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:41,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:43,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:43,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 15:41:43,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 15:41:43,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:41:43,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:41:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:41:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:43,469 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:41:43,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:43,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:43,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:43,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:43,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:43,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:41:43,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:43,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:43,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:43,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:43,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:43,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:41:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:43,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:43,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:43,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:41:43,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:43,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:41:43,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:43,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:43,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 15:41:43,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:43,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 15:41:43,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399292096] [2020-10-13 15:41:43,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:43,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:41:43,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690382708] [2020-10-13 15:41:43,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:41:43,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:43,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:41:43,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:43,603 INFO L87 Difference]: Start difference. First operand 1729 states and 2750 transitions. Second operand 5 states. [2020-10-13 15:41:43,821 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:41:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:45,572 INFO L93 Difference]: Finished difference Result 3591 states and 5664 transitions. [2020-10-13 15:41:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:41:45,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 15:41:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:45,586 INFO L225 Difference]: With dead ends: 3591 [2020-10-13 15:41:45,586 INFO L226 Difference]: Without dead ends: 1882 [2020-10-13 15:41:45,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:41:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2020-10-13 15:41:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1718. [2020-10-13 15:41:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-10-13 15:41:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2733 transitions. [2020-10-13 15:41:45,744 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2733 transitions. Word has length 63 [2020-10-13 15:41:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:45,745 INFO L479 AbstractCegarLoop]: Abstraction has 1718 states and 2733 transitions. [2020-10-13 15:41:45,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:41:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2733 transitions. [2020-10-13 15:41:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 15:41:45,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:45,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-13 15:41:45,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:41:45,751 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1574652932, now seen corresponding path program 1 times [2020-10-13 15:41:45,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:45,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378526818] [2020-10-13 15:41:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:45,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:45,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:45,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:45,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:45,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:50,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:50,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:50,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 15:41:50,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:41:50,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:41:50,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:50,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:50,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 15:41:50,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:41:50,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:50,908 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:41:50,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:50,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:50,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:50,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:50,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:50,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:41:50,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:50,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:50,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:50,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:50,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:50,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:41:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:50,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:50,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:50,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:41:50,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:50,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:41:50,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:50,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:50,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:50,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 15:41:50,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:51,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378526818] [2020-10-13 15:41:51,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:51,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:41:51,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447921709] [2020-10-13 15:41:51,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:41:51,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:41:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:51,005 INFO L87 Difference]: Start difference. First operand 1718 states and 2733 transitions. Second operand 5 states. [2020-10-13 15:41:51,535 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:41:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:53,276 INFO L93 Difference]: Finished difference Result 3940 states and 6395 transitions. [2020-10-13 15:41:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:41:53,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 15:41:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:53,295 INFO L225 Difference]: With dead ends: 3940 [2020-10-13 15:41:53,295 INFO L226 Difference]: Without dead ends: 2242 [2020-10-13 15:41:53,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:41:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-10-13 15:41:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2050. [2020-10-13 15:41:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2050 states. [2020-10-13 15:41:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3334 transitions. [2020-10-13 15:41:53,457 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3334 transitions. Word has length 63 [2020-10-13 15:41:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:53,458 INFO L479 AbstractCegarLoop]: Abstraction has 2050 states and 3334 transitions. [2020-10-13 15:41:53,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:41:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3334 transitions. [2020-10-13 15:41:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 15:41:53,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:53,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-13 15:41:53,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:41:53,460 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1852463729, now seen corresponding path program 1 times [2020-10-13 15:41:53,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:53,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138731843] [2020-10-13 15:41:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:53,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:53,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:53,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:53,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:54,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:54,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 15:41:54,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:41:54,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-13 15:41:54,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:54,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:54,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 15:41:54,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 15:41:54,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:54,677 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:41:54,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:54,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:54,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:54,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:54,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:54,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:41:54,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:54,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:54,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138731843] [2020-10-13 15:41:54,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:54,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:54,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687085448] [2020-10-13 15:41:54,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:54,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:54,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:54,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:54,697 INFO L87 Difference]: Start difference. First operand 2050 states and 3334 transitions. Second operand 4 states. [2020-10-13 15:41:54,822 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:41:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:55,964 INFO L93 Difference]: Finished difference Result 4268 states and 7107 transitions. [2020-10-13 15:41:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:55,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-13 15:41:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:55,976 INFO L225 Difference]: With dead ends: 4268 [2020-10-13 15:41:55,976 INFO L226 Difference]: Without dead ends: 2238 [2020-10-13 15:41:55,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2020-10-13 15:41:56,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2050. [2020-10-13 15:41:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2050 states. [2020-10-13 15:41:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3267 transitions. [2020-10-13 15:41:56,139 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3267 transitions. Word has length 63 [2020-10-13 15:41:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:56,139 INFO L479 AbstractCegarLoop]: Abstraction has 2050 states and 3267 transitions. [2020-10-13 15:41:56,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3267 transitions. [2020-10-13 15:41:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 15:41:56,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:56,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-13 15:41:56,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:41:56,142 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1607730664, now seen corresponding path program 1 times [2020-10-13 15:41:56,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:56,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598722253] [2020-10-13 15:41:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:56,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:56,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 15:41:56,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:41:56,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-13 15:41:56,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 15:41:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 15:41:56,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:56,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:56,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:56,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:56,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:56,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:41:56,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:56,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:56,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598722253] [2020-10-13 15:41:56,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:56,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:56,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932683600] [2020-10-13 15:41:56,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:56,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:56,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:56,724 INFO L87 Difference]: Start difference. First operand 2050 states and 3267 transitions. Second operand 4 states. [2020-10-13 15:41:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:58,487 INFO L93 Difference]: Finished difference Result 3939 states and 6431 transitions. [2020-10-13 15:41:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:58,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-13 15:41:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:58,512 INFO L225 Difference]: With dead ends: 3939 [2020-10-13 15:41:58,512 INFO L226 Difference]: Without dead ends: 3935 [2020-10-13 15:41:58,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2020-10-13 15:41:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3541. [2020-10-13 15:41:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3541 states. [2020-10-13 15:41:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5927 transitions. [2020-10-13 15:41:58,842 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5927 transitions. Word has length 63 [2020-10-13 15:41:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:58,843 INFO L479 AbstractCegarLoop]: Abstraction has 3541 states and 5927 transitions. [2020-10-13 15:41:58,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5927 transitions. [2020-10-13 15:41:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 15:41:58,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:58,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:58,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:41:58,847 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash -297288247, now seen corresponding path program 1 times [2020-10-13 15:41:58,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:58,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585503991] [2020-10-13 15:41:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:58,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:58,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:59,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:00,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:00,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 15:42:00,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:42:00,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-10-13 15:42:00,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:00,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:42:00,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 15:42:00,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 15:42:00,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:00,172 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:42:00,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:00,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:00,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:00,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:00,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:00,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:42:00,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:00,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:00,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:00,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:00,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:00,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:42:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:00,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:00,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:00,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 15:42:00,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:00,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 15:42:00,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:42:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:42:00,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:42:00,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585503991] [2020-10-13 15:42:00,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:42:00,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:42:00,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354013183] [2020-10-13 15:42:00,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:42:00,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:42:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:42:00,332 INFO L87 Difference]: Start difference. First operand 3541 states and 5927 transitions. Second operand 7 states. [2020-10-13 15:42:00,626 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-13 15:42:01,334 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:42:03,305 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:42:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:04,489 INFO L93 Difference]: Finished difference Result 11865 states and 21894 transitions. [2020-10-13 15:42:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:42:04,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-13 15:42:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:04,549 INFO L225 Difference]: With dead ends: 11865 [2020-10-13 15:42:04,549 INFO L226 Difference]: Without dead ends: 8344 [2020-10-13 15:42:04,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:42:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8344 states. [2020-10-13 15:42:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8344 to 7423. [2020-10-13 15:42:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7423 states. [2020-10-13 15:42:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 13523 transitions. [2020-10-13 15:42:05,764 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 13523 transitions. Word has length 75 [2020-10-13 15:42:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:05,767 INFO L479 AbstractCegarLoop]: Abstraction has 7423 states and 13523 transitions. [2020-10-13 15:42:05,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:42:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 13523 transitions. [2020-10-13 15:42:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 15:42:05,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:05,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:05,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:42:05,782 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:05,783 INFO L82 PathProgramCache]: Analyzing trace with hash -30419342, now seen corresponding path program 1 times [2020-10-13 15:42:05,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:05,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120346165] [2020-10-13 15:42:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:05,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:06,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:06,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:06,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 15:42:06,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:42:06,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-13 15:42:06,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 15:42:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 15:42:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:42:06,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:07,071 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:42:07,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:07,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:07,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:07,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:07,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:42:07,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:07,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:07,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:07,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:07,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:07,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:42:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:07,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:07,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:07,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 15:42:07,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:07,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:42:07,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:42:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:42:07,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:42:07,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120346165] [2020-10-13 15:42:07,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:42:07,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 15:42:07,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99235506] [2020-10-13 15:42:07,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 15:42:07,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:07,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 15:42:07,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 15:42:07,240 INFO L87 Difference]: Start difference. First operand 7423 states and 13523 transitions. Second operand 10 states. [2020-10-13 15:42:07,399 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:42:07,654 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 15:42:07,864 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 15:42:08,853 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 15:42:09,020 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-13 15:42:10,287 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-13 15:42:10,515 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-13 15:42:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:11,172 INFO L93 Difference]: Finished difference Result 16796 states and 31994 transitions. [2020-10-13 15:42:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 15:42:11,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-13 15:42:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:11,238 INFO L225 Difference]: With dead ends: 16796 [2020-10-13 15:42:11,238 INFO L226 Difference]: Without dead ends: 9393 [2020-10-13 15:42:11,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-13 15:42:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2020-10-13 15:42:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 7890. [2020-10-13 15:42:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7890 states. [2020-10-13 15:42:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7890 states to 7890 states and 13778 transitions. [2020-10-13 15:42:12,337 INFO L78 Accepts]: Start accepts. Automaton has 7890 states and 13778 transitions. Word has length 76 [2020-10-13 15:42:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:12,338 INFO L479 AbstractCegarLoop]: Abstraction has 7890 states and 13778 transitions. [2020-10-13 15:42:12,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 15:42:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 7890 states and 13778 transitions. [2020-10-13 15:42:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 15:42:12,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:12,352 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:12,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:42:12,353 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:12,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1676932106, now seen corresponding path program 1 times [2020-10-13 15:42:12,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:12,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822712882] [2020-10-13 15:42:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:12,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:12,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:12,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:12,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:12,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:13,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:13,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:14,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:14,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:15,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:17,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:17,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:17,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:17,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 15:42:17,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 15:42:17,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:42:17,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:17,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:17,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 15:42:17,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 15:42:17,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:17,515 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:42:17,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:17,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:17,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:17,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:17,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:42:17,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:17,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:17,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:17,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:17,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:17,652 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 15:42:17,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:42:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:17,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:17,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:42:17,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:17,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:42:17,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:17,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:17,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:42:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:17,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:17,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:17,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:42:17,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:17,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:42:17,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:17,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 15:42:17,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822712882] [2020-10-13 15:42:17,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:42:17,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 15:42:17,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305982881] [2020-10-13 15:42:17,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:42:17,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:17,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:42:17,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:42:17,762 INFO L87 Difference]: Start difference. First operand 7890 states and 13778 transitions. Second operand 6 states. [2020-10-13 15:42:18,489 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:42:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:20,847 INFO L93 Difference]: Finished difference Result 18562 states and 35326 transitions. [2020-10-13 15:42:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:42:20,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-10-13 15:42:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:20,900 INFO L225 Difference]: With dead ends: 18562 [2020-10-13 15:42:20,901 INFO L226 Difference]: Without dead ends: 10739 [2020-10-13 15:42:20,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:42:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10739 states. [2020-10-13 15:42:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10739 to 10027. [2020-10-13 15:42:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10027 states. [2020-10-13 15:42:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 17689 transitions. [2020-10-13 15:42:22,076 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 17689 transitions. Word has length 90 [2020-10-13 15:42:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:22,076 INFO L479 AbstractCegarLoop]: Abstraction has 10027 states and 17689 transitions. [2020-10-13 15:42:22,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:42:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 17689 transitions. [2020-10-13 15:42:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 15:42:22,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:22,087 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:22,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:42:22,088 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash -670574538, now seen corresponding path program 1 times [2020-10-13 15:42:22,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:22,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34386179] [2020-10-13 15:42:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:22,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:22,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:22,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:22,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:23,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:23,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:23,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:27,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:27,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 15:42:27,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:42:27,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:42:27,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:27,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:27,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 15:42:27,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 15:42:27,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:27,243 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:42:27,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:27,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:27,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:27,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:27,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:42:27,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:27,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:27,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:42:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:27,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:27,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:27,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:42:27,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:27,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:42:27,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:27,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:27,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:42:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:27,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:27,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:27,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:42:27,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:27,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:42:27,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:27,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:27,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:27,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:27,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 15:42:27,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34386179] [2020-10-13 15:42:27,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:42:27,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 15:42:27,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677511560] [2020-10-13 15:42:27,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:42:27,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:27,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:42:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:42:27,473 INFO L87 Difference]: Start difference. First operand 10027 states and 17689 transitions. Second operand 6 states. [2020-10-13 15:42:28,326 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:42:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:31,203 INFO L93 Difference]: Finished difference Result 20628 states and 39247 transitions. [2020-10-13 15:42:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:42:31,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-13 15:42:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:31,255 INFO L225 Difference]: With dead ends: 20628 [2020-10-13 15:42:31,255 INFO L226 Difference]: Without dead ends: 10668 [2020-10-13 15:42:31,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:42:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2020-10-13 15:42:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 9966. [2020-10-13 15:42:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9966 states. [2020-10-13 15:42:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 17387 transitions. [2020-10-13 15:42:32,617 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 17387 transitions. Word has length 94 [2020-10-13 15:42:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:32,618 INFO L479 AbstractCegarLoop]: Abstraction has 9966 states and 17387 transitions. [2020-10-13 15:42:32,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:42:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 17387 transitions. [2020-10-13 15:42:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 15:42:32,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:32,628 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:32,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 15:42:32,628 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1704045181, now seen corresponding path program 1 times [2020-10-13 15:42:32,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:32,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117165357] [2020-10-13 15:42:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:32,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:32,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:32,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:32,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:32,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:33,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:33,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:33,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:33,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:33,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:34,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:34,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:35,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:36,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:37,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:37,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:37,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 15:42:37,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 15:42:37,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 15:42:37,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:37,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:42:37,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 15:42:37,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 15:42:37,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:37,774 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:42:37,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:37,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:37,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:37,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:42:37,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:37,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:42:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:37,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:37,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:37,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:42:37,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:37,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:42:37,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:37,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:37,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:37,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:37,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:38,114 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-13 15:42:38,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:42:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:38,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:38,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:42:38,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:42:38,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 15:42:38,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117165357] [2020-10-13 15:42:38,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:42:38,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 15:42:38,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508482457] [2020-10-13 15:42:38,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:42:38,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:38,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:42:38,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:42:38,142 INFO L87 Difference]: Start difference. First operand 9966 states and 17387 transitions. Second operand 6 states. [2020-10-13 15:42:38,466 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:42:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:40,397 INFO L93 Difference]: Finished difference Result 21824 states and 42475 transitions. [2020-10-13 15:42:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:42:40,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-10-13 15:42:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:40,452 INFO L225 Difference]: With dead ends: 21824 [2020-10-13 15:42:40,452 INFO L226 Difference]: Without dead ends: 11925 [2020-10-13 15:42:40,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:42:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11925 states. [2020-10-13 15:42:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11925 to 11139. [2020-10-13 15:42:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11139 states. [2020-10-13 15:42:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11139 states to 11139 states and 20092 transitions. [2020-10-13 15:42:42,065 INFO L78 Accepts]: Start accepts. Automaton has 11139 states and 20092 transitions. Word has length 96 [2020-10-13 15:42:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:42,065 INFO L479 AbstractCegarLoop]: Abstraction has 11139 states and 20092 transitions. [2020-10-13 15:42:42,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:42:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 11139 states and 20092 transitions. [2020-10-13 15:42:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 15:42:42,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:42,073 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-13 15:42:42,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 15:42:42,073 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2014236504, now seen corresponding path program 1 times [2020-10-13 15:42:42,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:42,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679271828] [2020-10-13 15:42:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:42,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:42,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:47,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 15:42:47,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:42:47,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:42:47,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 15:42:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 15:42:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:47,218 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:42:47,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:47,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:47,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:47,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:47,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:42:47,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:47,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:47,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:42:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:47,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:47,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:42:47,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:47,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:42:47,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:47,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:47,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:47,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:47,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:47,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:42:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:47,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:47,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:42:47,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:47,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:42:47,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:47,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:47,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:47,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:47,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:47,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 15:42:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:47,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:47,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 15:42:47,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:47,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:42:47,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-13 15:42:47,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 15:42:47,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:47,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 15:42:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:47,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:42:47,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:47,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:42:47,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:47,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:47,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:42:47,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:47,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 15:42:47,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679271828] [2020-10-13 15:42:47,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:42:47,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 15:42:47,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122336556] [2020-10-13 15:42:47,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:42:47,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:47,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:42:47,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:42:47,520 INFO L87 Difference]: Start difference. First operand 11139 states and 20092 transitions. Second operand 7 states. [2020-10-13 15:42:47,695 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:42:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:52,033 INFO L93 Difference]: Finished difference Result 31740 states and 76176 transitions. [2020-10-13 15:42:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 15:42:52,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 132 [2020-10-13 15:42:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:52,125 INFO L225 Difference]: With dead ends: 31740 [2020-10-13 15:42:52,126 INFO L226 Difference]: Without dead ends: 20625 [2020-10-13 15:42:52,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 15:42:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20625 states. [2020-10-13 15:42:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20625 to 19404. [2020-10-13 15:42:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19404 states. [2020-10-13 15:42:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19404 states to 19404 states and 43998 transitions. [2020-10-13 15:42:55,935 INFO L78 Accepts]: Start accepts. Automaton has 19404 states and 43998 transitions. Word has length 132 [2020-10-13 15:42:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:55,935 INFO L479 AbstractCegarLoop]: Abstraction has 19404 states and 43998 transitions. [2020-10-13 15:42:55,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:42:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand 19404 states and 43998 transitions. [2020-10-13 15:42:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 15:42:55,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:55,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:55,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 15:42:55,943 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1227960428, now seen corresponding path program 1 times [2020-10-13 15:42:55,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:55,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367783280] [2020-10-13 15:42:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:55,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:57,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:57,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:57,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:58,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:59,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:00,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:00,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 15:43:00,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 15:43:00,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:43:00,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:00,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:43:00,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 15:43:00,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 15:43:00,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:01,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:43:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:01,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:01,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:43:01,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:01,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:43:01,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:01,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:01,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:01,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:01,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:01,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:43:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:01,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:01,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:01,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:43:01,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:01,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:43:01,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:01,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:01,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:01,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:01,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:01,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 15:43:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:01,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:01,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:01,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 15:43:01,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:01,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:43:01,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:43:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 15:43:01,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:01,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 15:43:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:01,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:01,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:01,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:43:01,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:01,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:43:01,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:01,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:43:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 15:43:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 15:43:01,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 15:43:01,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367783280] [2020-10-13 15:43:01,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:43:01,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:43:01,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322292916] [2020-10-13 15:43:01,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:43:01,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:43:01,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:43:01,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:43:01,467 INFO L87 Difference]: Start difference. First operand 19404 states and 43998 transitions. Second operand 7 states. [2020-10-13 15:43:01,603 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:43:02,119 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:43:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:43:07,721 INFO L93 Difference]: Finished difference Result 46102 states and 123161 transitions. [2020-10-13 15:43:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:43:07,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-13 15:43:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:43:07,875 INFO L225 Difference]: With dead ends: 46102 [2020-10-13 15:43:07,876 INFO L226 Difference]: Without dead ends: 26715 [2020-10-13 15:43:08,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:43:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26715 states. [2020-10-13 15:43:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26715 to 25398. [2020-10-13 15:43:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25398 states. [2020-10-13 15:43:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25398 states to 25398 states and 53959 transitions. [2020-10-13 15:43:13,996 INFO L78 Accepts]: Start accepts. Automaton has 25398 states and 53959 transitions. Word has length 107 [2020-10-13 15:43:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:43:13,996 INFO L479 AbstractCegarLoop]: Abstraction has 25398 states and 53959 transitions. [2020-10-13 15:43:13,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:43:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 25398 states and 53959 transitions. [2020-10-13 15:43:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 15:43:14,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:43:14,003 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:43:14,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 15:43:14,003 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:43:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:43:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash -854631658, now seen corresponding path program 1 times [2020-10-13 15:43:14,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:43:14,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682363520] [2020-10-13 15:43:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:43:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:14,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:14,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:14,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:14,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:14,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:15,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:15,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:15,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:15,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:19,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:19,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 15:43:19,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:43:19,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 15:43:19,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:43:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 15:43:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 15:43:19,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:19,161 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:43:19,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:43:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:19,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:19,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:19,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:43:19,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:19,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:43:19,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:19,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:19,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:43:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:19,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:19,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:19,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:43:19,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:43:19,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 15:43:19,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:19,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:43:19,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 15:43:19,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 15:43:19,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:19,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:43:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:19,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:19,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:19,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:43:19,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:19,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:43:19,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:43:19,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 15:43:19,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 15:43:19,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:19,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 15:43:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:19,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:19,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:19,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:43:19,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:19,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:43:19,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:43:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:19,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 15:43:19,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682363520] [2020-10-13 15:43:19,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:43:19,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 15:43:19,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163479989] [2020-10-13 15:43:19,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 15:43:19,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:43:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 15:43:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:43:19,460 INFO L87 Difference]: Start difference. First operand 25398 states and 53959 transitions. Second operand 8 states. [2020-10-13 15:43:19,594 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:43:19,834 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:43:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:43:29,803 INFO L93 Difference]: Finished difference Result 90079 states and 205401 transitions. [2020-10-13 15:43:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:43:29,803 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2020-10-13 15:43:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:43:30,218 INFO L225 Difference]: With dead ends: 90079 [2020-10-13 15:43:30,218 INFO L226 Difference]: Without dead ends: 64708 [2020-10-13 15:43:30,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-13 15:43:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64708 states. [2020-10-13 15:43:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64708 to 59267. [2020-10-13 15:43:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59267 states. [2020-10-13 15:43:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59267 states to 59267 states and 120226 transitions. [2020-10-13 15:43:43,312 INFO L78 Accepts]: Start accepts. Automaton has 59267 states and 120226 transitions. Word has length 101 [2020-10-13 15:43:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:43:43,313 INFO L479 AbstractCegarLoop]: Abstraction has 59267 states and 120226 transitions. [2020-10-13 15:43:43,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 15:43:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 59267 states and 120226 transitions. [2020-10-13 15:43:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 15:43:43,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:43:43,327 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:43:43,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 15:43:43,327 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:43:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:43:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash -883131948, now seen corresponding path program 1 times [2020-10-13 15:43:43,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:43:43,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374837377] [2020-10-13 15:43:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:43:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:43,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:43,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:43,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:43,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:43,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:45,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:48,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:48,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 15:43:48,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:43:48,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:43:48,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:43:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:43:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:43:48,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:48,467 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:43:48,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:43:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:48,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:48,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:48,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:43:48,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:48,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:43:48,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:48,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:48,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:43:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:48,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:48,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:48,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:43:48,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:48,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:43:48,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 15:43:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:48,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:48,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:43:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:48,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:48,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:48,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:43:48,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:48,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:43:48,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:48,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:48,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 15:43:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:48,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:48,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:43:48,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:48,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:43:48,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:48,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:48,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:43:48,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:48,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 15:43:48,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374837377] [2020-10-13 15:43:48,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:43:48,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 15:43:48,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682784608] [2020-10-13 15:43:48,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:43:48,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:43:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:43:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:43:48,708 INFO L87 Difference]: Start difference. First operand 59267 states and 120226 transitions. Second operand 6 states. [2020-10-13 15:43:48,837 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:43:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:43:57,417 INFO L93 Difference]: Finished difference Result 109790 states and 219744 transitions. [2020-10-13 15:43:57,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:43:57,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-13 15:43:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:43:57,672 INFO L225 Difference]: With dead ends: 109790 [2020-10-13 15:43:57,672 INFO L226 Difference]: Without dead ends: 50546 [2020-10-13 15:43:58,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:43:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50546 states. [2020-10-13 15:44:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50546 to 48859. [2020-10-13 15:44:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48859 states. [2020-10-13 15:44:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48859 states to 48859 states and 97515 transitions. [2020-10-13 15:44:08,111 INFO L78 Accepts]: Start accepts. Automaton has 48859 states and 97515 transitions. Word has length 101 [2020-10-13 15:44:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:44:08,112 INFO L479 AbstractCegarLoop]: Abstraction has 48859 states and 97515 transitions. [2020-10-13 15:44:08,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:44:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 48859 states and 97515 transitions. [2020-10-13 15:44:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 15:44:08,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:44:08,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:44:08,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 15:44:08,124 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:44:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:44:08,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1152116847, now seen corresponding path program 1 times [2020-10-13 15:44:08,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:44:08,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566846069] [2020-10-13 15:44:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:44:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:08,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:09,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:09,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:09,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:09,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:09,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:10,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:10,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:13,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:13,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 15:44:13,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:44:13,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 15:44:13,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:13,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:44:13,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:44:13,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 15:44:13,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:13,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:44:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:13,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:13,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:44:13,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:13,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:44:13,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:13,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:13,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 15:44:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:13,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:13,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:44:13,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:13,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:44:13,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:13,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:13,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 15:44:13,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:13,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:13,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 15:44:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:13,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:13,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:13,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 15:44:13,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:13,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:44:13,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 15:44:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:13,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:13,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 15:44:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:13,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:13,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:13,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:44:13,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:13,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:44:13,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:13,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:44:13,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:13,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:44:13,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566846069] [2020-10-13 15:44:13,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:44:13,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 15:44:13,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802871766] [2020-10-13 15:44:13,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:44:13,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:44:13,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:44:13,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:44:13,414 INFO L87 Difference]: Start difference. First operand 48859 states and 97515 transitions. Second operand 6 states. [2020-10-13 15:44:13,542 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 15:44:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:44:20,135 INFO L93 Difference]: Finished difference Result 99073 states and 196109 transitions. [2020-10-13 15:44:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 15:44:20,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-10-13 15:44:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:44:20,386 INFO L225 Difference]: With dead ends: 99073 [2020-10-13 15:44:20,386 INFO L226 Difference]: Without dead ends: 50581 [2020-10-13 15:44:21,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 15:44:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50581 states. [2020-10-13 15:44:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50581 to 48576. [2020-10-13 15:44:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48576 states. [2020-10-13 15:44:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48576 states to 48576 states and 96502 transitions. [2020-10-13 15:44:32,351 INFO L78 Accepts]: Start accepts. Automaton has 48576 states and 96502 transitions. Word has length 111 [2020-10-13 15:44:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:44:32,351 INFO L479 AbstractCegarLoop]: Abstraction has 48576 states and 96502 transitions. [2020-10-13 15:44:32,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:44:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 48576 states and 96502 transitions. [2020-10-13 15:44:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 15:44:32,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:44:32,358 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:44:32,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 15:44:32,359 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:44:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:44:32,359 INFO L82 PathProgramCache]: Analyzing trace with hash -102610544, now seen corresponding path program 1 times [2020-10-13 15:44:32,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:44:32,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331685147] [2020-10-13 15:44:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:44:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:32,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:32,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:32,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:32,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:32,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:35,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking...