/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.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:10:44,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:10:44,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:10:44,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:10:44,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:10:44,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:10:44,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:10:44,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:10:44,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:10:44,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:10:44,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:10:44,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:10:44,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:10:44,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:10:44,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:10:44,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:10:44,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:10:44,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:10:44,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:10:44,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:10:44,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:10:44,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:10:44,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:10:44,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:10:44,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:10:44,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:10:44,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:10:44,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:10:44,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:10:44,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:10:44,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:10:44,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:10:44,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:10:44,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:10:44,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:10:44,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:10:44,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:10:44,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:10:44,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:10:44,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:10:44,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:10:44,829 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 00:10:44,885 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:10:44,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:10:44,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:10:44,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:10:44,890 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:10:44,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:10:44,891 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:10:44,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:10:44,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:10:44,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:10:44,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:10:44,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:10:44,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:10:44,893 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:10:44,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:10:44,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:10:44,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:10:44,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:10:44,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:10:44,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:10:44,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:10:44,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:10:44,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:10:44,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:10:44,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:10:44,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:10:44,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:10:44,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:10:44,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:10:44,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:10:45,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:10:45,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:10:45,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:10:45,388 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:10:45,389 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:10:45,390 INFO L432 ainManager$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.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:10:45,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dbb520fe/bdc895e41ddf4ddc8d3a99cacfcc997c/FLAG28f35885c [2020-10-28 00:10:46,126 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:10:46,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:10:46,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dbb520fe/bdc895e41ddf4ddc8d3a99cacfcc997c/FLAG28f35885c [2020-10-28 00:10:46,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dbb520fe/bdc895e41ddf4ddc8d3a99cacfcc997c [2020-10-28 00:10:46,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:10:46,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:10:46,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:10:46,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:10:46,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:10:46,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:46,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b250cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46, skipping insertion in model container [2020-10-28 00:10:46,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:46,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:10:46,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:10:46,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:10:46,798 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:10:46,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:10:46,920 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:10:46,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46 WrapperNode [2020-10-28 00:10:46,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:10:46,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:10:46,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:10:46,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:10:46,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:46,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:46,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:46,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:46,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:46,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:46,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (1/1) ... [2020-10-28 00:10:47,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:10:47,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:10:47,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:10:47,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:10:47,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (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 00:10:47,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:10:47,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:10:47,095 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:10:47,095 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:10:47,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:10:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:10:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:10:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:10:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:10:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:10:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:10:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:10:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:10:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:10:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:10:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:10:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:10:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:10:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:10:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:10:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:10:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:10:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:10:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:10:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:10:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:10:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:10:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:10:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:10:48,058 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:10:48,059 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:10:48,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:10:48 BoogieIcfgContainer [2020-10-28 00:10:48,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:10:48,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:10:48,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:10:48,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:10:48,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:10:46" (1/3) ... [2020-10-28 00:10:48,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287bcbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:10:48, skipping insertion in model container [2020-10-28 00:10:48,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:10:46" (2/3) ... [2020-10-28 00:10:48,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287bcbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:10:48, skipping insertion in model container [2020-10-28 00:10:48,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:10:48" (3/3) ... [2020-10-28 00:10:48,073 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:10:48,085 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:10:48,091 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:10:48,107 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:10:48,148 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:10:48,148 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:10:48,148 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:10:48,148 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:10:48,148 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:10:48,148 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:10:48,149 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:10:48,149 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:10:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2020-10-28 00:10:48,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:10:48,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:48,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:48,181 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:48,188 INFO L82 PathProgramCache]: Analyzing trace with hash 816147482, now seen corresponding path program 1 times [2020-10-28 00:10:48,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:48,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065003374] [2020-10-28 00:10:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:48,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:48,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:49,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:51,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:51,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:10:51,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:10:51,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3087 [2020-10-28 00:10:51,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:51,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:51,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:10:51,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:10:51,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:10:51,949 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:10:51,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:51,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:51,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:51,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:51,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:51,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:10:51,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:51,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:51,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:51,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:52,011 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 00:10:52,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065003374] [2020-10-28 00:10:52,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:52,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:52,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57869194] [2020-10-28 00:10:52,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:52,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:52,040 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 4 states. [2020-10-28 00:10:52,322 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:10:52,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:52,943 INFO L93 Difference]: Finished difference Result 279 states and 440 transitions. [2020-10-28 00:10:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:52,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:10:52,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:52,958 INFO L225 Difference]: With dead ends: 279 [2020-10-28 00:10:52,959 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 00:10:52,963 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 00:10:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 00:10:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-28 00:10:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-28 00:10:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 264 transitions. [2020-10-28 00:10:53,030 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 264 transitions. Word has length 54 [2020-10-28 00:10:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:53,031 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 264 transitions. [2020-10-28 00:10:53,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 264 transitions. [2020-10-28 00:10:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:10:53,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:53,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:53,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:10:53,035 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1736921302, now seen corresponding path program 1 times [2020-10-28 00:10:53,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:53,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467264617] [2020-10-28 00:10:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:53,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:53,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:53,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:54,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:54,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:10:54,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:10:54,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-28 00:10:54,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:54,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:54,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:10:54,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:10:54,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:54,502 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:10:54,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:54,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:54,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:54,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:54,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:54,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:10:54,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:54,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:54,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:54,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:54,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:54,546 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 00:10:54,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467264617] [2020-10-28 00:10:54,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:54,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:54,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024472714] [2020-10-28 00:10:54,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:54,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:54,550 INFO L87 Difference]: Start difference. First operand 178 states and 264 transitions. Second operand 4 states. [2020-10-28 00:10:54,752 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:10:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:55,361 INFO L93 Difference]: Finished difference Result 440 states and 678 transitions. [2020-10-28 00:10:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:55,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 00:10:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:55,370 INFO L225 Difference]: With dead ends: 440 [2020-10-28 00:10:55,370 INFO L226 Difference]: Without dead ends: 293 [2020-10-28 00:10:55,375 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 00:10:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-28 00:10:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2020-10-28 00:10:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-28 00:10:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 441 transitions. [2020-10-28 00:10:55,439 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 441 transitions. Word has length 55 [2020-10-28 00:10:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:55,440 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 441 transitions. [2020-10-28 00:10:55,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 441 transitions. [2020-10-28 00:10:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:10:55,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:55,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:55,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:10:55,443 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1386051313, now seen corresponding path program 1 times [2020-10-28 00:10:55,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:55,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893298107] [2020-10-28 00:10:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:55,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:55,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:56,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:56,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:10:56,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:10:56,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-28 00:10:56,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:56,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:56,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:10:56,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:10:56,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:56,278 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:10:56,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:56,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:56,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:56,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:56,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:10:56,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:56,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:56,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:56,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:56,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:56,320 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 00:10:56,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893298107] [2020-10-28 00:10:56,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:56,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:56,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802943595] [2020-10-28 00:10:56,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:56,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:56,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:56,329 INFO L87 Difference]: Start difference. First operand 290 states and 441 transitions. Second operand 4 states. [2020-10-28 00:10:56,575 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:10:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:57,154 INFO L93 Difference]: Finished difference Result 744 states and 1157 transitions. [2020-10-28 00:10:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:57,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 00:10:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:57,159 INFO L225 Difference]: With dead ends: 744 [2020-10-28 00:10:57,159 INFO L226 Difference]: Without dead ends: 485 [2020-10-28 00:10:57,161 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 00:10:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-28 00:10:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 482. [2020-10-28 00:10:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-10-28 00:10:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 741 transitions. [2020-10-28 00:10:57,194 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 741 transitions. Word has length 56 [2020-10-28 00:10:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:57,195 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 741 transitions. [2020-10-28 00:10:57,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 741 transitions. [2020-10-28 00:10:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:10:57,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:57,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:57,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:10:57,197 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:57,198 INFO L82 PathProgramCache]: Analyzing trace with hash 232868969, now seen corresponding path program 1 times [2020-10-28 00:10:57,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:57,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226521246] [2020-10-28 00:10:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:57,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:57,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:58,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:58,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:10:58,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:10:58,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1260 [2020-10-28 00:10:58,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:10:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:10:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:10:58,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:58,768 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:10:58,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:58,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:58,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:58,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:58,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:58,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:10:58,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:58,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:58,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:58,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:58,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:58,838 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 00:10:58,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226521246] [2020-10-28 00:10:58,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:58,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:10:58,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353547687] [2020-10-28 00:10:58,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:10:58,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:58,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:10:58,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:10:58,841 INFO L87 Difference]: Start difference. First operand 482 states and 741 transitions. Second operand 7 states. [2020-10-28 00:10:59,159 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 00:10:59,993 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:11:00,267 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:00,546 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 00:11:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:00,661 INFO L93 Difference]: Finished difference Result 2737 states and 4291 transitions. [2020-10-28 00:11:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:11:00,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-28 00:11:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:00,676 INFO L225 Difference]: With dead ends: 2737 [2020-10-28 00:11:00,676 INFO L226 Difference]: Without dead ends: 2286 [2020-10-28 00:11:00,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:11:00,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2020-10-28 00:11:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 930. [2020-10-28 00:11:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-10-28 00:11:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1433 transitions. [2020-10-28 00:11:00,774 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1433 transitions. Word has length 57 [2020-10-28 00:11:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:00,775 INFO L481 AbstractCegarLoop]: Abstraction has 930 states and 1433 transitions. [2020-10-28 00:11:00,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:11:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1433 transitions. [2020-10-28 00:11:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:11:00,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:00,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:00,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:11:00,777 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1945751650, now seen corresponding path program 1 times [2020-10-28 00:11:00,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:00,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245765588] [2020-10-28 00:11:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:00,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:01,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:01,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:11:01,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:01,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-28 00:11:01,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:11:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 00:11:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:11:01,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:01,782 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:01,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:01,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:01,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:01,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:01,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:01,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:11:01,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:01,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:01,840 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 00:11:01,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245765588] [2020-10-28 00:11:01,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:01,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:11:01,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957775162] [2020-10-28 00:11:01,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:11:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:01,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:11:01,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:01,849 INFO L87 Difference]: Start difference. First operand 930 states and 1433 transitions. Second operand 5 states. [2020-10-28 00:11:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:02,719 INFO L93 Difference]: Finished difference Result 1861 states and 2867 transitions. [2020-10-28 00:11:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:11:02,720 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-28 00:11:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:02,732 INFO L225 Difference]: With dead ends: 1861 [2020-10-28 00:11:02,732 INFO L226 Difference]: Without dead ends: 1858 [2020-10-28 00:11:02,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:11:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2020-10-28 00:11:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 962. [2020-10-28 00:11:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 962 states. [2020-10-28 00:11:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1465 transitions. [2020-10-28 00:11:02,874 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1465 transitions. Word has length 58 [2020-10-28 00:11:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:02,875 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1465 transitions. [2020-10-28 00:11:02,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:11:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1465 transitions. [2020-10-28 00:11:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:11:02,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:02,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:02,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:11:02,877 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash 109213242, now seen corresponding path program 1 times [2020-10-28 00:11:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:02,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50026741] [2020-10-28 00:11:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:02,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:02,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:03,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:03,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:11:03,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:03,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-28 00:11:03,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:11:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:11:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:11:03,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:03,813 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:03,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:03,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:03,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:03,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:03,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:03,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:11:03,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:03,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:03,875 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 00:11:03,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50026741] [2020-10-28 00:11:03,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:03,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:11:03,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33679845] [2020-10-28 00:11:03,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:11:03,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:03,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:11:03,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:11:03,878 INFO L87 Difference]: Start difference. First operand 962 states and 1465 transitions. Second operand 7 states. [2020-10-28 00:11:04,718 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 00:11:04,987 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:11:05,192 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 00:11:05,454 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:11:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:06,272 INFO L93 Difference]: Finished difference Result 4198 states and 6401 transitions. [2020-10-28 00:11:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:11:06,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-28 00:11:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:06,291 INFO L225 Difference]: With dead ends: 4198 [2020-10-28 00:11:06,291 INFO L226 Difference]: Without dead ends: 3267 [2020-10-28 00:11:06,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:11:06,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2020-10-28 00:11:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3258. [2020-10-28 00:11:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3258 states. [2020-10-28 00:11:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 4945 transitions. [2020-10-28 00:11:06,627 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 4945 transitions. Word has length 59 [2020-10-28 00:11:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:06,629 INFO L481 AbstractCegarLoop]: Abstraction has 3258 states and 4945 transitions. [2020-10-28 00:11:06,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:11:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 4945 transitions. [2020-10-28 00:11:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:11:06,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:06,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:06,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:11:06,632 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1562645042, now seen corresponding path program 1 times [2020-10-28 00:11:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:06,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580508605] [2020-10-28 00:11:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:06,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:07,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:07,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:11:07,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:07,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-28 00:11:07,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:11:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:11:07,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:07,319 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:07,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:07,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:07,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:07,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:07,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:07,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:11:07,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:07,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:07,356 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 00:11:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580508605] [2020-10-28 00:11:07,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:07,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:07,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170756810] [2020-10-28 00:11:07,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:07,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:07,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:07,361 INFO L87 Difference]: Start difference. First operand 3258 states and 4945 transitions. Second operand 4 states. [2020-10-28 00:11:07,607 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:08,822 INFO L93 Difference]: Finished difference Result 8640 states and 13045 transitions. [2020-10-28 00:11:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:08,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 00:11:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:08,853 INFO L225 Difference]: With dead ends: 8640 [2020-10-28 00:11:08,853 INFO L226 Difference]: Without dead ends: 5413 [2020-10-28 00:11:08,864 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 00:11:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2020-10-28 00:11:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 5410. [2020-10-28 00:11:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5410 states. [2020-10-28 00:11:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5410 states to 5410 states and 8065 transitions. [2020-10-28 00:11:09,433 INFO L78 Accepts]: Start accepts. Automaton has 5410 states and 8065 transitions. Word has length 60 [2020-10-28 00:11:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:09,433 INFO L481 AbstractCegarLoop]: Abstraction has 5410 states and 8065 transitions. [2020-10-28 00:11:09,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 5410 states and 8065 transitions. [2020-10-28 00:11:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:11:09,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:09,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:09,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:11:09,435 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash -790399599, now seen corresponding path program 1 times [2020-10-28 00:11:09,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:09,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096176606] [2020-10-28 00:11:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:09,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:09,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:09,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:09,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:11:09,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:09,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-28 00:11:09,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:09,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:09,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:11:09,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:11:09,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:10,231 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:10,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:10,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:10,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:10,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:10,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:10,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:11:10,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:10,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:10,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:10,316 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 00:11:10,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096176606] [2020-10-28 00:11:10,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:10,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:10,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629047510] [2020-10-28 00:11:10,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:10,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:10,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:10,322 INFO L87 Difference]: Start difference. First operand 5410 states and 8065 transitions. Second operand 4 states. [2020-10-28 00:11:10,567 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:11,715 INFO L93 Difference]: Finished difference Result 13266 states and 19795 transitions. [2020-10-28 00:11:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:11,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 00:11:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:11,754 INFO L225 Difference]: With dead ends: 13266 [2020-10-28 00:11:11,754 INFO L226 Difference]: Without dead ends: 7887 [2020-10-28 00:11:11,766 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 00:11:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7887 states. [2020-10-28 00:11:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7887 to 7828. [2020-10-28 00:11:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7828 states. [2020-10-28 00:11:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7828 states to 7828 states and 11591 transitions. [2020-10-28 00:11:12,498 INFO L78 Accepts]: Start accepts. Automaton has 7828 states and 11591 transitions. Word has length 61 [2020-10-28 00:11:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:12,499 INFO L481 AbstractCegarLoop]: Abstraction has 7828 states and 11591 transitions. [2020-10-28 00:11:12,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 7828 states and 11591 transitions. [2020-10-28 00:11:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:11:12,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:12,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:11:12,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:11:12,509 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash 243904157, now seen corresponding path program 1 times [2020-10-28 00:11:12,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:12,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130080363] [2020-10-28 00:11:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:12,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:12,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:12,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:12,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:12,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:13,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:13,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:13,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:14,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:14,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:16,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:16,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:16,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:17,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:17,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:11:17,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:11:17,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:11:17,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:17,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:17,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 00:11:17,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:11:17,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:17,779 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:17,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:17,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:17,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:17,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:17,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:17,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:11:17,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:17,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:17,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130080363] [2020-10-28 00:11:17,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:17,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:17,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275925220] [2020-10-28 00:11:17,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:17,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:17,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:17,822 INFO L87 Difference]: Start difference. First operand 7828 states and 11591 transitions. Second operand 4 states. [2020-10-28 00:11:18,095 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:19,586 INFO L93 Difference]: Finished difference Result 18879 states and 27936 transitions. [2020-10-28 00:11:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:19,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 00:11:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:19,641 INFO L225 Difference]: With dead ends: 18879 [2020-10-28 00:11:19,641 INFO L226 Difference]: Without dead ends: 12564 [2020-10-28 00:11:19,658 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 00:11:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12564 states. [2020-10-28 00:11:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12564 to 11941. [2020-10-28 00:11:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11941 states. [2020-10-28 00:11:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 17510 transitions. [2020-10-28 00:11:20,774 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 17510 transitions. Word has length 84 [2020-10-28 00:11:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:20,775 INFO L481 AbstractCegarLoop]: Abstraction has 11941 states and 17510 transitions. [2020-10-28 00:11:20,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 17510 transitions. [2020-10-28 00:11:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:11:20,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:20,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:11:20,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:11:20,783 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:20,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1656568094, now seen corresponding path program 1 times [2020-10-28 00:11:20,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:20,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636575447] [2020-10-28 00:11:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:20,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:20,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:20,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:22,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:23,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:25,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:25,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:11:25,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:11:25,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:11:25,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:11:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:11:25,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:26,117 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:26,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:26,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:26,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:26,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:26,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:11:26,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:26,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:26,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:26,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636575447] [2020-10-28 00:11:26,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:26,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:26,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264795155] [2020-10-28 00:11:26,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:26,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:26,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:26,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:26,169 INFO L87 Difference]: Start difference. First operand 11941 states and 17510 transitions. Second operand 4 states. [2020-10-28 00:11:26,491 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:28,240 INFO L93 Difference]: Finished difference Result 25239 states and 36870 transitions. [2020-10-28 00:11:28,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:28,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 00:11:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:28,294 INFO L225 Difference]: With dead ends: 25239 [2020-10-28 00:11:28,295 INFO L226 Difference]: Without dead ends: 17060 [2020-10-28 00:11:28,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17060 states. [2020-10-28 00:11:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17060 to 16305. [2020-10-28 00:11:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16305 states. [2020-10-28 00:11:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16305 states to 16305 states and 23594 transitions. [2020-10-28 00:11:29,462 INFO L78 Accepts]: Start accepts. Automaton has 16305 states and 23594 transitions. Word has length 84 [2020-10-28 00:11:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:29,462 INFO L481 AbstractCegarLoop]: Abstraction has 16305 states and 23594 transitions. [2020-10-28 00:11:29,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 16305 states and 23594 transitions. [2020-10-28 00:11:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:11:29,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:29,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:11:29,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:11:29,473 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -550440779, now seen corresponding path program 1 times [2020-10-28 00:11:29,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:29,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122277471] [2020-10-28 00:11:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:29,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:29,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:29,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:29,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:30,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:31,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:31,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:32,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:32,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:34,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:34,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:11:34,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:11:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:11:34,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 00:11:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:11:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:34,749 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:34,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:34,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:34,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:34,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:34,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:34,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:11:34,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:34,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122277471] [2020-10-28 00:11:34,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:34,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:34,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079053619] [2020-10-28 00:11:34,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:34,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:34,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:34,794 INFO L87 Difference]: Start difference. First operand 16305 states and 23594 transitions. Second operand 4 states. [2020-10-28 00:11:35,038 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:36,835 INFO L93 Difference]: Finished difference Result 26830 states and 38617 transitions. [2020-10-28 00:11:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:36,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 00:11:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:36,880 INFO L225 Difference]: With dead ends: 26830 [2020-10-28 00:11:36,880 INFO L226 Difference]: Without dead ends: 17203 [2020-10-28 00:11:36,907 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 00:11:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17203 states. [2020-10-28 00:11:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17203 to 16613. [2020-10-28 00:11:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16613 states. [2020-10-28 00:11:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16613 states to 16613 states and 23680 transitions. [2020-10-28 00:11:38,101 INFO L78 Accepts]: Start accepts. Automaton has 16613 states and 23680 transitions. Word has length 84 [2020-10-28 00:11:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:38,102 INFO L481 AbstractCegarLoop]: Abstraction has 16613 states and 23680 transitions. [2020-10-28 00:11:38,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 16613 states and 23680 transitions. [2020-10-28 00:11:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:11:38,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:38,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:38,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:11:38,113 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2095843245, now seen corresponding path program 1 times [2020-10-28 00:11:38,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:38,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790869415] [2020-10-28 00:11:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:38,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:38,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:38,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:38,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:11:38,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:38,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-28 00:11:38,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:11:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:11:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 00:11:38,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:38,878 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:38,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:38,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:38,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:38,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:38,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:38,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:11:38,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:38,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:38,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:38,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:38,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:11:38,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790869415] [2020-10-28 00:11:38,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:11:38,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:11:38,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693923935] [2020-10-28 00:11:38,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:11:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:11:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:38,934 INFO L87 Difference]: Start difference. First operand 16613 states and 23680 transitions. Second operand 5 states. [2020-10-28 00:11:39,211 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:11:40,544 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:40,817 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:11:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:42,193 INFO L93 Difference]: Finished difference Result 38577 states and 55149 transitions. [2020-10-28 00:11:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:11:42,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-28 00:11:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:42,245 INFO L225 Difference]: With dead ends: 38577 [2020-10-28 00:11:42,245 INFO L226 Difference]: Without dead ends: 27190 [2020-10-28 00:11:42,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:11:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27190 states. [2020-10-28 00:11:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27190 to 26932. [2020-10-28 00:11:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26932 states. [2020-10-28 00:11:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26932 states to 26932 states and 38043 transitions. [2020-10-28 00:11:44,112 INFO L78 Accepts]: Start accepts. Automaton has 26932 states and 38043 transitions. Word has length 84 [2020-10-28 00:11:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:44,113 INFO L481 AbstractCegarLoop]: Abstraction has 26932 states and 38043 transitions. [2020-10-28 00:11:44,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:11:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 26932 states and 38043 transitions. [2020-10-28 00:11:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:11:44,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:44,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:44,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:11:44,125 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -987879714, now seen corresponding path program 1 times [2020-10-28 00:11:44,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:44,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132890094] [2020-10-28 00:11:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:44,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:44,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:44,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:44,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:45,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:48,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:48,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:11:48,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:11:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4153 [2020-10-28 00:11:48,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 00:11:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:11:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:48,588 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:48,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:48,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:48,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:48,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:48,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:11:48,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:48,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:48,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:48,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:48,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:48,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132890094] [2020-10-28 00:11:48,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:48,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:48,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250013730] [2020-10-28 00:11:48,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:48,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:48,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:48,630 INFO L87 Difference]: Start difference. First operand 26932 states and 38043 transitions. Second operand 4 states. [2020-10-28 00:11:49,902 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 00:11:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:50,672 INFO L93 Difference]: Finished difference Result 46621 states and 65812 transitions. [2020-10-28 00:11:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:50,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 00:11:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:50,709 INFO L225 Difference]: With dead ends: 46621 [2020-10-28 00:11:50,709 INFO L226 Difference]: Without dead ends: 19800 [2020-10-28 00:11:50,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 00:11:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19800 states. [2020-10-28 00:11:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19800 to 19710. [2020-10-28 00:11:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19710 states. [2020-10-28 00:11:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19710 states to 19710 states and 27523 transitions. [2020-10-28 00:11:52,275 INFO L78 Accepts]: Start accepts. Automaton has 19710 states and 27523 transitions. Word has length 84 [2020-10-28 00:11:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:52,275 INFO L481 AbstractCegarLoop]: Abstraction has 19710 states and 27523 transitions. [2020-10-28 00:11:52,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 19710 states and 27523 transitions. [2020-10-28 00:11:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:11:52,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:52,285 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:52,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:11:52,285 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -357301782, now seen corresponding path program 1 times [2020-10-28 00:11:52,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:52,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248043891] [2020-10-28 00:11:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:52,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:52,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:52,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:52,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:52,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:54,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:11:54,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:11:54,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2207 [2020-10-28 00:11:54,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:54,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:11:54,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:11:54,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:11:54,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:54,790 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:11:54,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:54,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:54,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:54,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:54,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:11:54,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:54,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:54,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:54,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:54,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:54,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248043891] [2020-10-28 00:11:54,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:11:54,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:11:54,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175545753] [2020-10-28 00:11:54,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:11:54,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:54,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:11:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:11:54,834 INFO L87 Difference]: Start difference. First operand 19710 states and 27523 transitions. Second operand 6 states. [2020-10-28 00:11:56,073 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:11:56,470 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:11:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:58,296 INFO L93 Difference]: Finished difference Result 49630 states and 68614 transitions. [2020-10-28 00:11:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:11:58,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-28 00:11:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:58,344 INFO L225 Difference]: With dead ends: 49630 [2020-10-28 00:11:58,345 INFO L226 Difference]: Without dead ends: 30060 [2020-10-28 00:11:58,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:11:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30060 states. [2020-10-28 00:11:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30060 to 20416. [2020-10-28 00:11:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20416 states. [2020-10-28 00:12:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20416 states to 20416 states and 27858 transitions. [2020-10-28 00:12:00,013 INFO L78 Accepts]: Start accepts. Automaton has 20416 states and 27858 transitions. Word has length 85 [2020-10-28 00:12:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:00,013 INFO L481 AbstractCegarLoop]: Abstraction has 20416 states and 27858 transitions. [2020-10-28 00:12:00,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 20416 states and 27858 transitions. [2020-10-28 00:12:00,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:12:00,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:00,019 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:00,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:12:00,019 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:00,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1268061674, now seen corresponding path program 1 times [2020-10-28 00:12:00,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:00,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341656657] [2020-10-28 00:12:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:00,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:01,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:01,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:12:01,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:01,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-28 00:12:01,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:01,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:01,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:01,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:12:01,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:01,817 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:01,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:01,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:01,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:01,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:01,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:01,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:12:01,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:01,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:01,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:01,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:01,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:01,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341656657] [2020-10-28 00:12:01,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:12:01,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:12:01,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355558312] [2020-10-28 00:12:01,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:01,844 INFO L87 Difference]: Start difference. First operand 20416 states and 27858 transitions. Second operand 6 states. [2020-10-28 00:12:02,253 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-10-28 00:12:03,217 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:12:03,642 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:12:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:06,740 INFO L93 Difference]: Finished difference Result 63722 states and 86457 transitions. [2020-10-28 00:12:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:06,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-28 00:12:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:06,792 INFO L225 Difference]: With dead ends: 63722 [2020-10-28 00:12:06,792 INFO L226 Difference]: Without dead ends: 43365 [2020-10-28 00:12:06,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43365 states. [2020-10-28 00:12:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43365 to 24559. [2020-10-28 00:12:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24559 states. [2020-10-28 00:12:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24559 states to 24559 states and 33143 transitions. [2020-10-28 00:12:08,931 INFO L78 Accepts]: Start accepts. Automaton has 24559 states and 33143 transitions. Word has length 85 [2020-10-28 00:12:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:08,931 INFO L481 AbstractCegarLoop]: Abstraction has 24559 states and 33143 transitions. [2020-10-28 00:12:08,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 24559 states and 33143 transitions. [2020-10-28 00:12:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:12:08,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:08,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:08,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:12:08,938 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:08,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:08,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1405007172, now seen corresponding path program 1 times [2020-10-28 00:12:08,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:08,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351870188] [2020-10-28 00:12:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:08,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:09,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:09,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:09,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:09,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:09,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:13,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:12:13,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:12:13,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:12:13,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:12:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:12:13,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:14,214 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:14,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:14,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:14,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:14,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:14,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:12:14,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:14,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:14,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:14,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:14,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:14,245 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 00:12:14,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351870188] [2020-10-28 00:12:14,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:14,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:14,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649701798] [2020-10-28 00:12:14,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:14,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:14,248 INFO L87 Difference]: Start difference. First operand 24559 states and 33143 transitions. Second operand 4 states. [2020-10-28 00:12:14,507 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:18,220 INFO L93 Difference]: Finished difference Result 61992 states and 83390 transitions. [2020-10-28 00:12:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:18,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-28 00:12:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:18,301 INFO L225 Difference]: With dead ends: 61992 [2020-10-28 00:12:18,301 INFO L226 Difference]: Without dead ends: 41747 [2020-10-28 00:12:18,343 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 00:12:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41747 states. [2020-10-28 00:12:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41747 to 41535. [2020-10-28 00:12:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41535 states. [2020-10-28 00:12:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41535 states to 41535 states and 55316 transitions. [2020-10-28 00:12:21,741 INFO L78 Accepts]: Start accepts. Automaton has 41535 states and 55316 transitions. Word has length 85 [2020-10-28 00:12:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:21,742 INFO L481 AbstractCegarLoop]: Abstraction has 41535 states and 55316 transitions. [2020-10-28 00:12:21,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 41535 states and 55316 transitions. [2020-10-28 00:12:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:12:21,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:21,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:21,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:12:21,749 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash 145694783, now seen corresponding path program 1 times [2020-10-28 00:12:21,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:21,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197930056] [2020-10-28 00:12:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:21,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:21,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:21,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:22,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:22,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:23,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:23,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:12:23,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:23,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1732 [2020-10-28 00:12:23,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:12:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:23,773 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:23,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:23,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:23,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:23,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:23,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:23,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:12:23,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:23,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:23,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:23,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:23,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:23,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197930056] [2020-10-28 00:12:23,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:12:23,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:12:23,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071973054] [2020-10-28 00:12:23,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:23,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:23,805 INFO L87 Difference]: Start difference. First operand 41535 states and 55316 transitions. Second operand 6 states. [2020-10-28 00:12:25,534 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:12:26,126 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:12:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:32,743 INFO L93 Difference]: Finished difference Result 126084 states and 166971 transitions. [2020-10-28 00:12:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:32,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-28 00:12:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:32,948 INFO L225 Difference]: With dead ends: 126084 [2020-10-28 00:12:32,949 INFO L226 Difference]: Without dead ends: 84672 [2020-10-28 00:12:33,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84672 states. [2020-10-28 00:12:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84672 to 51478. [2020-10-28 00:12:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51478 states. [2020-10-28 00:12:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51478 states to 51478 states and 67777 transitions. [2020-10-28 00:12:38,172 INFO L78 Accepts]: Start accepts. Automaton has 51478 states and 67777 transitions. Word has length 85 [2020-10-28 00:12:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:38,172 INFO L481 AbstractCegarLoop]: Abstraction has 51478 states and 67777 transitions. [2020-10-28 00:12:38,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 51478 states and 67777 transitions. [2020-10-28 00:12:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:12:38,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:38,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:38,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:12:38,180 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash 631137036, now seen corresponding path program 1 times [2020-10-28 00:12:38,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:38,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479344504] [2020-10-28 00:12:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:38,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:38,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:38,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:38,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:38,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:43,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:43,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:12:43,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:12:43,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:12:43,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:12:43,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:43,460 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:43,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:43,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:43,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:43,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:43,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:43,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:12:43,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:43,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:43,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:43,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:43,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:43,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479344504] [2020-10-28 00:12:43,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:12:43,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:12:43,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80538851] [2020-10-28 00:12:43,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:43,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:43,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:43,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:43,487 INFO L87 Difference]: Start difference. First operand 51478 states and 67777 transitions. Second operand 6 states. [2020-10-28 00:12:45,137 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:12:47,574 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:12:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:52,246 INFO L93 Difference]: Finished difference Result 127735 states and 167335 transitions. [2020-10-28 00:12:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 00:12:52,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-28 00:12:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:52,354 INFO L225 Difference]: With dead ends: 127735 [2020-10-28 00:12:52,354 INFO L226 Difference]: Without dead ends: 76296 [2020-10-28 00:12:52,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76296 states. [2020-10-28 00:12:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76296 to 59067. [2020-10-28 00:12:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59067 states. [2020-10-28 00:12:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59067 states to 59067 states and 76131 transitions. [2020-10-28 00:12:58,191 INFO L78 Accepts]: Start accepts. Automaton has 59067 states and 76131 transitions. Word has length 85 [2020-10-28 00:12:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:58,192 INFO L481 AbstractCegarLoop]: Abstraction has 59067 states and 76131 transitions. [2020-10-28 00:12:58,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 59067 states and 76131 transitions. [2020-10-28 00:12:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 00:12:58,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:58,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:58,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:12:58,202 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2027830099, now seen corresponding path program 1 times [2020-10-28 00:12:58,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:58,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084710307] [2020-10-28 00:12:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:58,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:59,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:03,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 00:13:03,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:13:03,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:13:03,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:13:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:13:03,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:03,551 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2020-10-28 00:13:03,853 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:13:03,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:03,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:03,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:03,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:03,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:13:03,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:03,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:03,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:03,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:03,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:03,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084710307] [2020-10-28 00:13:03,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:13:03,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:13:03,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568115241] [2020-10-28 00:13:03,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:13:03,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:03,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:13:03,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:13:03,912 INFO L87 Difference]: Start difference. First operand 59067 states and 76131 transitions. Second operand 11 states. [2020-10-28 00:13:04,386 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 00:13:05,513 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-28 00:13:08,227 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:13:08,899 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:13:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:18,759 INFO L93 Difference]: Finished difference Result 118139 states and 151935 transitions. [2020-10-28 00:13:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 00:13:18,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-28 00:13:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:18,892 INFO L225 Difference]: With dead ends: 118139 [2020-10-28 00:13:18,892 INFO L226 Difference]: Without dead ends: 94984 [2020-10-28 00:13:18,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 00:13:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94984 states. [2020-10-28 00:13:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94984 to 61091. [2020-10-28 00:13:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61091 states. [2020-10-28 00:13:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61091 states to 61091 states and 78669 transitions. [2020-10-28 00:13:25,949 INFO L78 Accepts]: Start accepts. Automaton has 61091 states and 78669 transitions. Word has length 87 [2020-10-28 00:13:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:25,950 INFO L481 AbstractCegarLoop]: Abstraction has 61091 states and 78669 transitions. [2020-10-28 00:13:25,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:13:25,950 INFO L276 IsEmpty]: Start isEmpty. Operand 61091 states and 78669 transitions. [2020-10-28 00:13:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 00:13:25,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:25,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:13:25,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:13:25,960 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1524785272, now seen corresponding path program 1 times [2020-10-28 00:13:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:25,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968200949] [2020-10-28 00:13:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:25,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:26,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:26,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:26,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:26,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:26,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:28,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:30,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:30,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 00:13:30,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:13:30,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:13:30,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:30,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:13:30,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:13:30,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 00:13:31,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:31,312 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:13:31,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:31,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:31,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:31,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:31,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:31,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:13:31,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:31,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:31,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:31,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:31,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:13:31,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968200949] [2020-10-28 00:13:31,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:13:31,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 00:13:31,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059574893] [2020-10-28 00:13:31,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:13:31,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:13:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:13:31,361 INFO L87 Difference]: Start difference. First operand 61091 states and 78669 transitions. Second operand 7 states. [2020-10-28 00:13:31,657 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:13:33,607 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:13:33,880 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:13:42,046 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:13:42,503 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:13:42,799 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:13:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:50,688 INFO L93 Difference]: Finished difference Result 180167 states and 235028 transitions. [2020-10-28 00:13:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 00:13:50,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 87 [2020-10-28 00:13:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:50,906 INFO L225 Difference]: With dead ends: 180167 [2020-10-28 00:13:50,906 INFO L226 Difference]: Without dead ends: 152746 [2020-10-28 00:13:50,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 00:13:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152746 states. [2020-10-28 00:14:02,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152746 to 89585. [2020-10-28 00:14:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89585 states. [2020-10-28 00:14:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89585 states to 89585 states and 114911 transitions. [2020-10-28 00:14:02,505 INFO L78 Accepts]: Start accepts. Automaton has 89585 states and 114911 transitions. Word has length 87 [2020-10-28 00:14:02,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:02,505 INFO L481 AbstractCegarLoop]: Abstraction has 89585 states and 114911 transitions. [2020-10-28 00:14:02,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:14:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 89585 states and 114911 transitions. [2020-10-28 00:14:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 00:14:02,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:02,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:14:02,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:14:02,516 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:02,516 INFO L82 PathProgramCache]: Analyzing trace with hash -230992989, now seen corresponding path program 1 times [2020-10-28 00:14:02,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:02,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491499980] [2020-10-28 00:14:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:02,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:02,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:02,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:02,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:02,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:03,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:05,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:05,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:07,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:07,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:07,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:07,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 00:14:07,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:14:07,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 00:14:07,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:14:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:14:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:14:07,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:07,957 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:14:07,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:07,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:07,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:07,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:07,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:07,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:14:07,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:07,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:07,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:07,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491499980] [2020-10-28 00:14:07,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:14:07,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:14:07,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918360911] [2020-10-28 00:14:07,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:14:07,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:07,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:14:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:14:07,991 INFO L87 Difference]: Start difference. First operand 89585 states and 114911 transitions. Second operand 11 states. [2020-10-28 00:14:08,293 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 00:14:13,175 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 153