/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:07:41,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:07:41,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:07:41,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:07:41,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:07:41,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:07:41,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:07:41,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:07:41,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:07:41,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:07:41,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:07:41,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:07:41,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:07:41,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:07:41,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:07:41,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:07:41,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:07:41,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:07:41,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:07:41,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:07:41,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:07:41,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:07:41,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:07:41,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:07:41,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:07:41,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:07:41,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:07:41,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:07:41,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:07:41,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:07:41,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:07:41,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:07:41,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:07:41,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:07:41,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:07:41,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:07:41,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:07:41,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:07:41,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:07:41,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:07:41,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:07:41,720 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 [2020-10-28 00:07:41,787 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:07:41,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:07:41,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:07:41,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:07:41,794 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:07:41,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:07:41,795 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:07:41,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:07:41,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:07:41,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:07:41,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:07:41,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:07:41,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:07:41,798 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:07:41,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:07:41,798 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:07:41,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:07:41,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:07:41,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:07:41,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:07:41,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:07:41,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:07:41,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:07:41,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:07:41,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:07:41,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:07:41,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:07:41,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:07:41,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:07:41,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:07:42,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:07:42,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:07:42,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:07:42,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:07:42,282 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:07:42,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:07:42,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78e34d33/270ec6d8f9514a8f97e22c5910602395/FLAGff4a86692 [2020-10-28 00:07:43,042 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:07:43,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:07:43,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78e34d33/270ec6d8f9514a8f97e22c5910602395/FLAGff4a86692 [2020-10-28 00:07:43,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78e34d33/270ec6d8f9514a8f97e22c5910602395 [2020-10-28 00:07:43,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:07:43,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:07:43,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:07:43,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:07:43,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:07:43,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec72985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43, skipping insertion in model container [2020-10-28 00:07:43,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:07:43,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:07:43,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:07:43,721 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:07:43,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:07:43,812 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:07:43,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43 WrapperNode [2020-10-28 00:07:43,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:07:43,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:07:43,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:07:43,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:07:43,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (1/1) ... [2020-10-28 00:07:43,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:07:43,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:07:43,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:07:43,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:07:43,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (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 [2020-10-28 00:07:44,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:07:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:07:44,059 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:07:44,059 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:07:44,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:07:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:07:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:07:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:07:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:07:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:07:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:07:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:07:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:07:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:07:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:07:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:07:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:07:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:07:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:07:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:07:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:07:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:07:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:07:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:07:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:07:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:07:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:07:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:07:44,982 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:07:44,983 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:07:44,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:07:44 BoogieIcfgContainer [2020-10-28 00:07:44,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:07:44,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:07:44,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:07:44,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:07:44,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:07:43" (1/3) ... [2020-10-28 00:07:44,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19865838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:07:44, skipping insertion in model container [2020-10-28 00:07:44,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:43" (2/3) ... [2020-10-28 00:07:44,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19865838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:07:44, skipping insertion in model container [2020-10-28 00:07:44,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:07:44" (3/3) ... [2020-10-28 00:07:44,995 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:07:45,009 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:07:45,015 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:07:45,030 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:07:45,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:07:45,063 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:07:45,063 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:07:45,063 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:07:45,063 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:07:45,063 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:07:45,063 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:07:45,064 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:07:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-10-28 00:07:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 00:07:45,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:45,096 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] [2020-10-28 00:07:45,096 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash -734565587, now seen corresponding path program 1 times [2020-10-28 00:07:45,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:45,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744930816] [2020-10-28 00:07:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:45,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:45,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:46,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:46,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 00:07:46,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:07:46,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1606 [2020-10-28 00:07:46,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:07:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:07:46,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:07:47,301 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:47,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:47,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:47,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:47,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:47,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:47,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:07:47,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:47,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:47,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744930816] [2020-10-28 00:07:47,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:47,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:47,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884999684] [2020-10-28 00:07:47,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:47,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:47,394 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 4 states. [2020-10-28 00:07:47,659 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:48,308 INFO L93 Difference]: Finished difference Result 218 states and 339 transitions. [2020-10-28 00:07:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:48,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 00:07:48,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:48,322 INFO L225 Difference]: With dead ends: 218 [2020-10-28 00:07:48,323 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 00:07:48,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:48,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 00:07:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-10-28 00:07:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 00:07:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 199 transitions. [2020-10-28 00:07:48,404 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 199 transitions. Word has length 43 [2020-10-28 00:07:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:48,405 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 199 transitions. [2020-10-28 00:07:48,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 199 transitions. [2020-10-28 00:07:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 00:07:48,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:48,408 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] [2020-10-28 00:07:48,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:07:48,408 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1730635764, now seen corresponding path program 1 times [2020-10-28 00:07:48,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:48,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73481688] [2020-10-28 00:07:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:48,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:49,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 00:07:49,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:49,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-28 00:07:49,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:07:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:07:49,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:07:49,289 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:49,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:49,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:49,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:49,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:49,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:07:49,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:49,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:49,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:49,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:49,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:49,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73481688] [2020-10-28 00:07:49,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:49,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:49,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239587852] [2020-10-28 00:07:49,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:49,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:49,328 INFO L87 Difference]: Start difference. First operand 135 states and 199 transitions. Second operand 4 states. [2020-10-28 00:07:49,496 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:49,921 INFO L93 Difference]: Finished difference Result 325 states and 497 transitions. [2020-10-28 00:07:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:49,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-28 00:07:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:49,925 INFO L225 Difference]: With dead ends: 325 [2020-10-28 00:07:49,925 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 00:07:49,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:49,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 00:07:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2020-10-28 00:07:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-28 00:07:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 318 transitions. [2020-10-28 00:07:49,962 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 318 transitions. Word has length 44 [2020-10-28 00:07:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:49,962 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 318 transitions. [2020-10-28 00:07:49,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 318 transitions. [2020-10-28 00:07:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 00:07:49,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:49,965 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] [2020-10-28 00:07:49,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:07:49,965 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1506192612, now seen corresponding path program 1 times [2020-10-28 00:07:49,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:49,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832111731] [2020-10-28 00:07:49,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:50,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:50,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:50,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:50,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 00:07:50,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:50,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-28 00:07:50,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:50,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:50,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:07:50,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:07:50,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:51,025 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:51,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:51,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:51,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:51,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:51,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:07:51,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:51,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:51,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:51,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832111731] [2020-10-28 00:07:51,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:51,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:51,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414040448] [2020-10-28 00:07:51,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:51,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:51,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:51,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:51,065 INFO L87 Difference]: Start difference. First operand 211 states and 318 transitions. Second operand 6 states. [2020-10-28 00:07:51,257 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:07:51,889 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:07:52,060 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:52,100 INFO L93 Difference]: Finished difference Result 959 states and 1494 transitions. [2020-10-28 00:07:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:07:52,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 00:07:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:52,107 INFO L225 Difference]: With dead ends: 959 [2020-10-28 00:07:52,108 INFO L226 Difference]: Without dead ends: 772 [2020-10-28 00:07:52,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:07:52,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-10-28 00:07:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 395. [2020-10-28 00:07:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-28 00:07:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 602 transitions. [2020-10-28 00:07:52,171 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 602 transitions. Word has length 45 [2020-10-28 00:07:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:52,172 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 602 transitions. [2020-10-28 00:07:52,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 602 transitions. [2020-10-28 00:07:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 00:07:52,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:52,174 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] [2020-10-28 00:07:52,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:07:52,175 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:52,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1127369728, now seen corresponding path program 1 times [2020-10-28 00:07:52,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:52,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584985187] [2020-10-28 00:07:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:52,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 00:07:52,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:52,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-28 00:07:52,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:52,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:07:52,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 00:07:52,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:07:52,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:52,822 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:52,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:52,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:52,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:52,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:07:52,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:52,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:52,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584985187] [2020-10-28 00:07:52,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:52,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:07:52,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608453290] [2020-10-28 00:07:52,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:07:52,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:52,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:07:52,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:52,892 INFO L87 Difference]: Start difference. First operand 395 states and 602 transitions. Second operand 5 states. [2020-10-28 00:07:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:53,467 INFO L93 Difference]: Finished difference Result 782 states and 1196 transitions. [2020-10-28 00:07:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:07:53,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-28 00:07:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:53,473 INFO L225 Difference]: With dead ends: 782 [2020-10-28 00:07:53,473 INFO L226 Difference]: Without dead ends: 779 [2020-10-28 00:07:53,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-10-28 00:07:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 411. [2020-10-28 00:07:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-28 00:07:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 618 transitions. [2020-10-28 00:07:53,537 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 618 transitions. Word has length 46 [2020-10-28 00:07:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:53,538 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 618 transitions. [2020-10-28 00:07:53,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:07:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 618 transitions. [2020-10-28 00:07:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 00:07:53,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:53,550 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] [2020-10-28 00:07:53,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:07:53,551 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:53,551 INFO L82 PathProgramCache]: Analyzing trace with hash -290696299, now seen corresponding path program 1 times [2020-10-28 00:07:53,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:53,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195419130] [2020-10-28 00:07:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:53,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:54,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:54,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 00:07:54,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:54,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-28 00:07:54,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:54,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:54,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:07:54,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:07:54,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:54,324 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:54,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:54,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:54,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:54,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:54,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:07:54,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:54,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:54,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195419130] [2020-10-28 00:07:54,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:54,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:54,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119965889] [2020-10-28 00:07:54,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:54,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:54,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:54,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:54,367 INFO L87 Difference]: Start difference. First operand 411 states and 618 transitions. Second operand 6 states. [2020-10-28 00:07:54,891 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:07:55,061 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:07:55,181 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:07:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:55,511 INFO L93 Difference]: Finished difference Result 1420 states and 2152 transitions. [2020-10-28 00:07:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:07:55,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 00:07:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:55,520 INFO L225 Difference]: With dead ends: 1420 [2020-10-28 00:07:55,521 INFO L226 Difference]: Without dead ends: 1033 [2020-10-28 00:07:55,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:07:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-28 00:07:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1027. [2020-10-28 00:07:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-10-28 00:07:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1546 transitions. [2020-10-28 00:07:55,659 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1546 transitions. Word has length 47 [2020-10-28 00:07:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:55,659 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1546 transitions. [2020-10-28 00:07:55,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1546 transitions. [2020-10-28 00:07:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 00:07:55,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:55,664 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] [2020-10-28 00:07:55,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:07:55,664 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1148549980, now seen corresponding path program 1 times [2020-10-28 00:07:55,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:55,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363901059] [2020-10-28 00:07:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:55,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:55,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:56,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:56,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 00:07:56,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:56,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-28 00:07:56,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:56,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:56,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:07:56,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:07:56,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:56,209 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:56,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:56,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:56,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:56,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:56,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:56,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:07:56,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:56,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:56,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:56,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:56,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363901059] [2020-10-28 00:07:56,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:56,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:56,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42064090] [2020-10-28 00:07:56,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:56,242 INFO L87 Difference]: Start difference. First operand 1027 states and 1546 transitions. Second operand 4 states. [2020-10-28 00:07:56,409 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:57,057 INFO L93 Difference]: Finished difference Result 2641 states and 3958 transitions. [2020-10-28 00:07:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:57,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-28 00:07:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:57,070 INFO L225 Difference]: With dead ends: 2641 [2020-10-28 00:07:57,070 INFO L226 Difference]: Without dead ends: 1638 [2020-10-28 00:07:57,073 INFO L677 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 [2020-10-28 00:07:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2020-10-28 00:07:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1635. [2020-10-28 00:07:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1635 states. [2020-10-28 00:07:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2410 transitions. [2020-10-28 00:07:57,256 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2410 transitions. Word has length 48 [2020-10-28 00:07:57,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:57,256 INFO L481 AbstractCegarLoop]: Abstraction has 1635 states and 2410 transitions. [2020-10-28 00:07:57,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:57,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2410 transitions. [2020-10-28 00:07:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 00:07:57,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:57,257 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] [2020-10-28 00:07:57,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:07:57,258 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1231851298, now seen corresponding path program 1 times [2020-10-28 00:07:57,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:57,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702310903] [2020-10-28 00:07:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:57,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:57,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:57,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:57,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 00:07:57,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:57,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-28 00:07:57,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:57,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:07:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:07:57,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:57,852 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:57,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:57,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:57,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:57,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:57,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:57,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:07:57,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:57,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:57,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:57,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:57,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:57,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702310903] [2020-10-28 00:07:57,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:57,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:57,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600068466] [2020-10-28 00:07:57,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:57,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:57,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:57,886 INFO L87 Difference]: Start difference. First operand 1635 states and 2410 transitions. Second operand 4 states. [2020-10-28 00:07:58,036 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:58,650 INFO L93 Difference]: Finished difference Result 3959 states and 5848 transitions. [2020-10-28 00:07:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:58,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-28 00:07:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:58,667 INFO L225 Difference]: With dead ends: 3959 [2020-10-28 00:07:58,667 INFO L226 Difference]: Without dead ends: 2348 [2020-10-28 00:07:58,673 INFO L677 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 [2020-10-28 00:07:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2020-10-28 00:07:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2325. [2020-10-28 00:07:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2325 states. [2020-10-28 00:07:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 3400 transitions. [2020-10-28 00:07:58,925 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 3400 transitions. Word has length 49 [2020-10-28 00:07:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:58,925 INFO L481 AbstractCegarLoop]: Abstraction has 2325 states and 3400 transitions. [2020-10-28 00:07:58,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 3400 transitions. [2020-10-28 00:07:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:07:58,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:58,929 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, 1, 1, 1, 1, 1] [2020-10-28 00:07:58,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:07:58,930 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:58,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1874485256, now seen corresponding path program 1 times [2020-10-28 00:07:58,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:58,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044892910] [2020-10-28 00:07:58,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:58,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:59,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:59,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:59,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:07:59,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:59,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-28 00:07:59,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:07:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:07:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 00:07:59,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:59,791 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:59,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:59,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:59,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:59,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:59,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:07:59,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:59,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:59,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:07:59,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044892910] [2020-10-28 00:07:59,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:59,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:07:59,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474576480] [2020-10-28 00:07:59,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:07:59,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:59,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:07:59,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:59,851 INFO L87 Difference]: Start difference. First operand 2325 states and 3400 transitions. Second operand 5 states. [2020-10-28 00:08:00,046 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:00,768 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:08:00,906 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:08:01,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:01,317 INFO L93 Difference]: Finished difference Result 5458 states and 8018 transitions. [2020-10-28 00:08:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:08:01,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-28 00:08:01,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:01,337 INFO L225 Difference]: With dead ends: 5458 [2020-10-28 00:08:01,338 INFO L226 Difference]: Without dead ends: 3847 [2020-10-28 00:08:01,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:08:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3847 states. [2020-10-28 00:08:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3847 to 3817. [2020-10-28 00:08:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3817 states. [2020-10-28 00:08:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3817 states to 3817 states and 5532 transitions. [2020-10-28 00:08:01,719 INFO L78 Accepts]: Start accepts. Automaton has 3817 states and 5532 transitions. Word has length 68 [2020-10-28 00:08:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:01,721 INFO L481 AbstractCegarLoop]: Abstraction has 3817 states and 5532 transitions. [2020-10-28 00:08:01,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:08:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3817 states and 5532 transitions. [2020-10-28 00:08:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:08:01,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:01,724 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:01,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:08:01,724 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1057720051, now seen corresponding path program 1 times [2020-10-28 00:08:01,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:01,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073141782] [2020-10-28 00:08:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:01,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:06,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:06,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:08:06,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:08:06,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 00:08:06,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:08:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:08:06,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:06,940 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:06,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:06,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:06,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:06,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:06,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:06,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:08:06,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:06,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:06,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:06,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:06,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073141782] [2020-10-28 00:08:06,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:06,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:06,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856406425] [2020-10-28 00:08:06,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:06,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:06,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:06,976 INFO L87 Difference]: Start difference. First operand 3817 states and 5532 transitions. Second operand 4 states. [2020-10-28 00:08:07,125 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:08:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:07,964 INFO L93 Difference]: Finished difference Result 8410 states and 12181 transitions. [2020-10-28 00:08:07,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:07,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:08:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:07,994 INFO L225 Difference]: With dead ends: 8410 [2020-10-28 00:08:07,995 INFO L226 Difference]: Without dead ends: 5655 [2020-10-28 00:08:08,003 INFO L677 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 [2020-10-28 00:08:08,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2020-10-28 00:08:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 5268. [2020-10-28 00:08:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-10-28 00:08:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 7541 transitions. [2020-10-28 00:08:08,493 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 7541 transitions. Word has length 68 [2020-10-28 00:08:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:08,494 INFO L481 AbstractCegarLoop]: Abstraction has 5268 states and 7541 transitions. [2020-10-28 00:08:08,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 7541 transitions. [2020-10-28 00:08:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:08:08,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:08,497 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:08,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:08:08,497 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:08,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1149288822, now seen corresponding path program 1 times [2020-10-28 00:08:08,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:08,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11859179] [2020-10-28 00:08:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:08,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:13,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:13,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:08:13,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:08:13,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:08:13,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:08:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:08:13,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:08:13,700 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:13,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:13,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:13,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:13,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:08:13,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:13,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11859179] [2020-10-28 00:08:13,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:13,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:13,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536528101] [2020-10-28 00:08:13,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:13,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:13,736 INFO L87 Difference]: Start difference. First operand 5268 states and 7541 transitions. Second operand 4 states. [2020-10-28 00:08:13,872 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:08:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:14,759 INFO L93 Difference]: Finished difference Result 8882 states and 12627 transitions. [2020-10-28 00:08:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:14,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:08:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:14,793 INFO L225 Difference]: With dead ends: 8882 [2020-10-28 00:08:14,794 INFO L226 Difference]: Without dead ends: 5597 [2020-10-28 00:08:14,804 INFO L677 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 [2020-10-28 00:08:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2020-10-28 00:08:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5421. [2020-10-28 00:08:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5421 states. [2020-10-28 00:08:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5421 states to 5421 states and 7590 transitions. [2020-10-28 00:08:15,365 INFO L78 Accepts]: Start accepts. Automaton has 5421 states and 7590 transitions. Word has length 68 [2020-10-28 00:08:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:15,365 INFO L481 AbstractCegarLoop]: Abstraction has 5421 states and 7590 transitions. [2020-10-28 00:08:15,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5421 states and 7590 transitions. [2020-10-28 00:08:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:08:15,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:15,369 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:15,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:08:15,369 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -517063931, now seen corresponding path program 1 times [2020-10-28 00:08:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:15,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206767226] [2020-10-28 00:08:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:16,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:16,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:20,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:20,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:08:20,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:08:20,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4868 [2020-10-28 00:08:20,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 00:08:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:08:20,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:20,498 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:20,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:20,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:20,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:20,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:20,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:20,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:08:20,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:20,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:08:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:20,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206767226] [2020-10-28 00:08:20,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:20,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:20,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827272284] [2020-10-28 00:08:20,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:20,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:20,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:20,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:20,543 INFO L87 Difference]: Start difference. First operand 5421 states and 7590 transitions. Second operand 4 states. [2020-10-28 00:08:21,199 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:08:21,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:21,425 INFO L93 Difference]: Finished difference Result 9612 states and 13441 transitions. [2020-10-28 00:08:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:21,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:08:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:21,503 INFO L225 Difference]: With dead ends: 9612 [2020-10-28 00:08:21,503 INFO L226 Difference]: Without dead ends: 4252 [2020-10-28 00:08:21,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2020-10-28 00:08:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 4194. [2020-10-28 00:08:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4194 states. [2020-10-28 00:08:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 5787 transitions. [2020-10-28 00:08:21,943 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 5787 transitions. Word has length 68 [2020-10-28 00:08:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:21,944 INFO L481 AbstractCegarLoop]: Abstraction has 4194 states and 5787 transitions. [2020-10-28 00:08:21,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 5787 transitions. [2020-10-28 00:08:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:08:21,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:21,955 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:21,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:08:21,955 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash 259962829, now seen corresponding path program 1 times [2020-10-28 00:08:21,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:21,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937583175] [2020-10-28 00:08:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:22,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:22,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:22,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:22,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:24,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:24,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:08:24,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:24,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2540 [2020-10-28 00:08:24,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:08:24,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:24,685 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:24,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:24,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:24,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:24,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:24,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:24,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:08:24,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:24,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:24,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:24,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:24,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:24,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937583175] [2020-10-28 00:08:24,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:24,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:24,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664599168] [2020-10-28 00:08:24,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:24,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:24,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:24,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:24,718 INFO L87 Difference]: Start difference. First operand 4194 states and 5787 transitions. Second operand 6 states. [2020-10-28 00:08:25,293 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:08:25,476 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:08:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:25,940 INFO L93 Difference]: Finished difference Result 10615 states and 14486 transitions. [2020-10-28 00:08:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:08:25,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:08:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:25,968 INFO L225 Difference]: With dead ends: 10615 [2020-10-28 00:08:25,969 INFO L226 Difference]: Without dead ends: 6501 [2020-10-28 00:08:25,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2020-10-28 00:08:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 4394. [2020-10-28 00:08:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4394 states. [2020-10-28 00:08:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 5901 transitions. [2020-10-28 00:08:26,426 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 5901 transitions. Word has length 69 [2020-10-28 00:08:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:26,426 INFO L481 AbstractCegarLoop]: Abstraction has 4394 states and 5901 transitions. [2020-10-28 00:08:26,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 5901 transitions. [2020-10-28 00:08:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:08:26,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:26,429 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:26,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:08:26,429 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:26,430 INFO L82 PathProgramCache]: Analyzing trace with hash 98963580, now seen corresponding path program 1 times [2020-10-28 00:08:26,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:26,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220437240] [2020-10-28 00:08:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:26,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:28,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:08:28,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:28,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2431 [2020-10-28 00:08:28,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:28,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:28,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:28,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:08:28,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:29,044 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:29,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:29,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:29,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:29,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:29,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:08:29,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:29,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:29,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:29,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:29,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:29,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220437240] [2020-10-28 00:08:29,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:29,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:29,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759882057] [2020-10-28 00:08:29,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:29,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:29,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:29,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:29,076 INFO L87 Difference]: Start difference. First operand 4394 states and 5901 transitions. Second operand 6 states. [2020-10-28 00:08:29,712 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:08:30,097 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:08:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:30,489 INFO L93 Difference]: Finished difference Result 11791 states and 15712 transitions. [2020-10-28 00:08:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 00:08:30,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:08:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:30,516 INFO L225 Difference]: With dead ends: 11791 [2020-10-28 00:08:30,516 INFO L226 Difference]: Without dead ends: 7429 [2020-10-28 00:08:30,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2020-10-28 00:08:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 5290. [2020-10-28 00:08:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5290 states. [2020-10-28 00:08:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5290 states to 5290 states and 6875 transitions. [2020-10-28 00:08:31,260 INFO L78 Accepts]: Start accepts. Automaton has 5290 states and 6875 transitions. Word has length 69 [2020-10-28 00:08:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:31,261 INFO L481 AbstractCegarLoop]: Abstraction has 5290 states and 6875 transitions. [2020-10-28 00:08:31,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5290 states and 6875 transitions. [2020-10-28 00:08:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:08:31,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:31,264 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:31,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:08:31,264 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash -175448246, now seen corresponding path program 1 times [2020-10-28 00:08:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:31,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434443881] [2020-10-28 00:08:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:36,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:36,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:08:36,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:08:36,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:08:36,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:36,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:08:36,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:36,439 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:36,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:36,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:36,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:36,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:36,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:36,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:08:36,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:36,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434443881] [2020-10-28 00:08:36,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:36,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:36,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655312841] [2020-10-28 00:08:36,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:36,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:36,475 INFO L87 Difference]: Start difference. First operand 5290 states and 6875 transitions. Second operand 6 states. [2020-10-28 00:08:37,147 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:08:37,365 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:08:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:38,036 INFO L93 Difference]: Finished difference Result 15971 states and 20632 transitions. [2020-10-28 00:08:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:08:38,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:08:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:38,072 INFO L225 Difference]: With dead ends: 15971 [2020-10-28 00:08:38,072 INFO L226 Difference]: Without dead ends: 10742 [2020-10-28 00:08:38,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10742 states. [2020-10-28 00:08:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10742 to 6588. [2020-10-28 00:08:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6588 states. [2020-10-28 00:08:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 8457 transitions. [2020-10-28 00:08:38,818 INFO L78 Accepts]: Start accepts. Automaton has 6588 states and 8457 transitions. Word has length 69 [2020-10-28 00:08:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:38,818 INFO L481 AbstractCegarLoop]: Abstraction has 6588 states and 8457 transitions. [2020-10-28 00:08:38,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6588 states and 8457 transitions. [2020-10-28 00:08:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:08:38,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:38,821 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:38,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:08:38,821 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash 618896690, now seen corresponding path program 1 times [2020-10-28 00:08:38,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:38,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811543014] [2020-10-28 00:08:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:38,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:38,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:39,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:39,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:08:39,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:08:39,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-28 00:08:39,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:08:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:08:39,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:39,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:39,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:39,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:39,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:39,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:39,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:08:39,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:39,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:39,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:39,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:39,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:39,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811543014] [2020-10-28 00:08:39,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:39,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599099797] [2020-10-28 00:08:39,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:39,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:39,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:39,980 INFO L87 Difference]: Start difference. First operand 6588 states and 8457 transitions. Second operand 4 states. [2020-10-28 00:08:40,128 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:08:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:41,281 INFO L93 Difference]: Finished difference Result 13947 states and 17919 transitions. [2020-10-28 00:08:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:41,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:08:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:41,303 INFO L225 Difference]: With dead ends: 13947 [2020-10-28 00:08:41,303 INFO L226 Difference]: Without dead ends: 9365 [2020-10-28 00:08:41,315 INFO L677 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 [2020-10-28 00:08:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9365 states. [2020-10-28 00:08:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9365 to 9320. [2020-10-28 00:08:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9320 states. [2020-10-28 00:08:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 11856 transitions. [2020-10-28 00:08:42,207 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 11856 transitions. Word has length 69 [2020-10-28 00:08:42,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:42,207 INFO L481 AbstractCegarLoop]: Abstraction has 9320 states and 11856 transitions. [2020-10-28 00:08:42,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 11856 transitions. [2020-10-28 00:08:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:08:42,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:42,211 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:42,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:08:42,211 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1660018427, now seen corresponding path program 1 times [2020-10-28 00:08:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:42,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996987210] [2020-10-28 00:08:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:42,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:44,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:44,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:44,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:47,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:47,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:08:47,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:08:47,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:08:47,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:08:47,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:47,560 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:47,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:47,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:47,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:47,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:47,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:47,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:08:47,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:47,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:47,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996987210] [2020-10-28 00:08:47,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:47,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:08:47,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037957125] [2020-10-28 00:08:47,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:47,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:47,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:47,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:47,600 INFO L87 Difference]: Start difference. First operand 9320 states and 11856 transitions. Second operand 11 states. [2020-10-28 00:08:47,773 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:08:49,393 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:08:50,872 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:08:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:52,509 INFO L93 Difference]: Finished difference Result 33879 states and 42669 transitions. [2020-10-28 00:08:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 00:08:52,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-28 00:08:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:52,560 INFO L225 Difference]: With dead ends: 33879 [2020-10-28 00:08:52,561 INFO L226 Difference]: Without dead ends: 27756 [2020-10-28 00:08:52,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 00:08:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27756 states. [2020-10-28 00:08:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27756 to 10803. [2020-10-28 00:08:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10803 states. [2020-10-28 00:08:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10803 states to 10803 states and 13758 transitions. [2020-10-28 00:08:54,134 INFO L78 Accepts]: Start accepts. Automaton has 10803 states and 13758 transitions. Word has length 71 [2020-10-28 00:08:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:54,134 INFO L481 AbstractCegarLoop]: Abstraction has 10803 states and 13758 transitions. [2020-10-28 00:08:54,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:08:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 10803 states and 13758 transitions. [2020-10-28 00:08:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:08:54,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:54,138 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:54,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:08:54,139 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:54,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1140085317, now seen corresponding path program 1 times [2020-10-28 00:08:54,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:54,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105749142] [2020-10-28 00:08:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:54,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:56,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:58,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:58,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:08:58,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:08:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4235 [2020-10-28 00:08:58,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:08:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 00:08:58,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:58,540 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:58,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:58,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:58,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:58,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:58,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:58,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:08:58,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:58,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:58,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:58,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:58,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:08:58,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105749142] [2020-10-28 00:08:58,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:58,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:58,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790715538] [2020-10-28 00:08:58,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:58,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:58,578 INFO L87 Difference]: Start difference. First operand 10803 states and 13758 transitions. Second operand 6 states. [2020-10-28 00:08:58,742 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:08:59,373 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:09:00,377 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:09:00,512 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:09:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:01,171 INFO L93 Difference]: Finished difference Result 25089 states and 32357 transitions. [2020-10-28 00:09:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:09:01,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 00:09:01,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:01,210 INFO L225 Difference]: With dead ends: 25089 [2020-10-28 00:09:01,210 INFO L226 Difference]: Without dead ends: 20366 [2020-10-28 00:09:01,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:09:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20366 states. [2020-10-28 00:09:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20366 to 15026. [2020-10-28 00:09:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15026 states. [2020-10-28 00:09:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15026 states to 15026 states and 19018 transitions. [2020-10-28 00:09:02,849 INFO L78 Accepts]: Start accepts. Automaton has 15026 states and 19018 transitions. Word has length 71 [2020-10-28 00:09:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:02,849 INFO L481 AbstractCegarLoop]: Abstraction has 15026 states and 19018 transitions. [2020-10-28 00:09:02,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:09:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 15026 states and 19018 transitions. [2020-10-28 00:09:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:09:02,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:02,854 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:09:02,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:09:02,854 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1929293526, now seen corresponding path program 1 times [2020-10-28 00:09:02,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:02,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047950345] [2020-10-28 00:09:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:02,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:02,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:04,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:06,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:09:06,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:09:06,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3815 [2020-10-28 00:09:06,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:06,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:09:06,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:09:06,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:09:06,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:06,844 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:09:06,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:06,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:06,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:06,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:06,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:09:06,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:06,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:06,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:06,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:06,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047950345] [2020-10-28 00:09:06,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:09:06,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:09:06,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371976154] [2020-10-28 00:09:06,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:09:06,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:06,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:09:06,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:09:06,877 INFO L87 Difference]: Start difference. First operand 15026 states and 19018 transitions. Second operand 6 states. [2020-10-28 00:09:07,019 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:09:08,041 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:09:08,264 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:09:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:12,460 INFO L93 Difference]: Finished difference Result 61058 states and 77581 transitions. [2020-10-28 00:09:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:09:12,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 00:09:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:12,525 INFO L225 Difference]: With dead ends: 61058 [2020-10-28 00:09:12,525 INFO L226 Difference]: Without dead ends: 46950 [2020-10-28 00:09:12,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:09:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46950 states. [2020-10-28 00:09:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46950 to 42254. [2020-10-28 00:09:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42254 states. [2020-10-28 00:09:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42254 states to 42254 states and 53468 transitions. [2020-10-28 00:09:17,080 INFO L78 Accepts]: Start accepts. Automaton has 42254 states and 53468 transitions. Word has length 71 [2020-10-28 00:09:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:17,080 INFO L481 AbstractCegarLoop]: Abstraction has 42254 states and 53468 transitions. [2020-10-28 00:09:17,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:09:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 42254 states and 53468 transitions. [2020-10-28 00:09:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:09:17,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:17,087 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:09:17,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:09:17,088 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:17,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:17,088 INFO L82 PathProgramCache]: Analyzing trace with hash -343813979, now seen corresponding path program 1 times [2020-10-28 00:09:17,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:17,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600594176] [2020-10-28 00:09:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:17,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:17,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:17,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:17,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:17,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:18,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:18,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:18,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:19,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:22,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:09:22,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:09:22,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:09:22,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:09:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:09:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:09:22,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:22,522 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 27 [2020-10-28 00:09:22,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:22,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:22,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:22,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:22,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:09:22,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:22,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:22,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600594176] [2020-10-28 00:09:22,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:09:22,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:09:22,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014976973] [2020-10-28 00:09:22,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:09:22,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:09:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:09:22,747 INFO L87 Difference]: Start difference. First operand 42254 states and 53468 transitions. Second operand 12 states. [2020-10-28 00:09:23,021 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 00:09:24,990 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:09:25,294 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:09:25,493 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:09:28,431 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:09:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:34,865 INFO L93 Difference]: Finished difference Result 93253 states and 116771 transitions. [2020-10-28 00:09:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 00:09:34,866 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-28 00:09:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:34,959 INFO L225 Difference]: With dead ends: 93253 [2020-10-28 00:09:34,959 INFO L226 Difference]: Without dead ends: 76475 [2020-10-28 00:09:34,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=427, Invalid=2225, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 00:09:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76475 states. [2020-10-28 00:09:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76475 to 42238. [2020-10-28 00:09:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42238 states. [2020-10-28 00:09:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42238 states to 42238 states and 53444 transitions. [2020-10-28 00:09:40,187 INFO L78 Accepts]: Start accepts. Automaton has 42238 states and 53444 transitions. Word has length 71 [2020-10-28 00:09:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:40,188 INFO L481 AbstractCegarLoop]: Abstraction has 42238 states and 53444 transitions. [2020-10-28 00:09:40,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:09:40,188 INFO L276 IsEmpty]: Start isEmpty. Operand 42238 states and 53444 transitions. [2020-10-28 00:09:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:09:40,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:40,195 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:09:40,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:09:40,196 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:40,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1898703489, now seen corresponding path program 1 times [2020-10-28 00:09:40,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:40,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49976925] [2020-10-28 00:09:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:40,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:41,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:41,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:43,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:44,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:45,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:45,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:09:45,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:09:45,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:09:45,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:09:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:09:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:09:45,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:45,510 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:09:45,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:45,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:45,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:45,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:45,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:45,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:09:45,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:45,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:45,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49976925] [2020-10-28 00:09:45,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:09:45,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:09:45,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380810982] [2020-10-28 00:09:45,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:09:45,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:45,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:09:45,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:09:45,543 INFO L87 Difference]: Start difference. First operand 42238 states and 53444 transitions. Second operand 11 states. [2020-10-28 00:09:45,730 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:09:47,427 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:09:47,706 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:09:49,552 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:09:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:58,464 INFO L93 Difference]: Finished difference Result 120434 states and 151817 transitions. [2020-10-28 00:09:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 00:09:58,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-28 00:09:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:58,591 INFO L225 Difference]: With dead ends: 120434 [2020-10-28 00:09:58,592 INFO L226 Difference]: Without dead ends: 94638 [2020-10-28 00:09:58,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=411, Invalid=1569, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:09:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94638 states. [2020-10-28 00:10:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94638 to 44175. [2020-10-28 00:10:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44175 states. [2020-10-28 00:10:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44175 states to 44175 states and 55910 transitions. [2020-10-28 00:10:04,404 INFO L78 Accepts]: Start accepts. Automaton has 44175 states and 55910 transitions. Word has length 71 [2020-10-28 00:10:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:04,405 INFO L481 AbstractCegarLoop]: Abstraction has 44175 states and 55910 transitions. [2020-10-28 00:10:04,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:10:04,405 INFO L276 IsEmpty]: Start isEmpty. Operand 44175 states and 55910 transitions. [2020-10-28 00:10:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:10:04,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:04,411 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:10:04,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:10:04,411 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash 831158076, now seen corresponding path program 1 times [2020-10-28 00:10:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879983588] [2020-10-28 00:10:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:04,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:05,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:06,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:06,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:06,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:09,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:09,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:10:09,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:10:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:10:09,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:10:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:10:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:10:09,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:09,686 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 19 [2020-10-28 00:10:09,900 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:10:09,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:09,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:09,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:09,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:09,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:09,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:10:09,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:09,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:09,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:09,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:09,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879983588] [2020-10-28 00:10:09,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:10:09,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:10:09,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169905711] [2020-10-28 00:10:09,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:10:09,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:09,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:10:09,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:10:09,931 INFO L87 Difference]: Start difference. First operand 44175 states and 55910 transitions. Second operand 12 states. [2020-10-28 00:10:10,329 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 141 [2020-10-28 00:10:13,715 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:10:13,885 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:10:14,235 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:10:17,980 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:10:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:33,164 INFO L93 Difference]: Finished difference Result 161118 states and 202646 transitions. [2020-10-28 00:10:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-28 00:10:33,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-28 00:10:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:33,532 INFO L225 Difference]: With dead ends: 161118 [2020-10-28 00:10:33,532 INFO L226 Difference]: Without dead ends: 131760 [2020-10-28 00:10:33,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1282, Invalid=7648, Unknown=0, NotChecked=0, Total=8930 [2020-10-28 00:10:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131760 states. [2020-10-28 00:10:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131760 to 76031. [2020-10-28 00:10:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76031 states. [2020-10-28 00:10:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76031 states to 76031 states and 96813 transitions. [2020-10-28 00:10:44,295 INFO L78 Accepts]: Start accepts. Automaton has 76031 states and 96813 transitions. Word has length 71 [2020-10-28 00:10:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:44,295 INFO L481 AbstractCegarLoop]: Abstraction has 76031 states and 96813 transitions. [2020-10-28 00:10:44,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:10:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 76031 states and 96813 transitions. [2020-10-28 00:10:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:10:44,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:44,300 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:10:44,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 00:10:44,300 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:44,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1018955881, now seen corresponding path program 1 times [2020-10-28 00:10:44,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:44,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71621970] [2020-10-28 00:10:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:44,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:44,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:44,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:44,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:45,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:45,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:48,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:48,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:10:48,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:10:48,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3779 [2020-10-28 00:10:48,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:10:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:10:48,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:48,254 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:10:48,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:48,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:48,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:48,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:48,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:48,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:10:48,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:48,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:48,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:48,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:48,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:48,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71621970] [2020-10-28 00:10:48,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:10:48,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:10:48,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004428583] [2020-10-28 00:10:48,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:48,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:48,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:48,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:48,276 INFO L87 Difference]: Start difference. First operand 76031 states and 96813 transitions. Second operand 6 states. [2020-10-28 00:10:48,421 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:10:49,824 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:10:50,038 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 126