/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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:16:33,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:16:33,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:16:33,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:16:33,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:16:33,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:16:33,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:16:33,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:16:33,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:16:33,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:16:33,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:16:33,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:16:33,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:16:33,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:16:33,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:16:33,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:16:33,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:16:33,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:16:33,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:16:33,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:16:33,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:16:33,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:16:33,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:16:33,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:16:33,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:16:33,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:16:33,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:16:33,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:16:33,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:16:33,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:16:33,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:16:33,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:16:33,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:16:33,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:16:33,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:16:33,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:16:33,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:16:33,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:16:33,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:16:33,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:16:33,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:16:33,828 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 00:16:33,885 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:16:33,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:16:33,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:16:33,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:16:33,887 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:16:33,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:16:33,888 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:16:33,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:16:33,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:16:33,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:16:33,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:16:33,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:16:33,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:16:33,889 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:16:33,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:16:33,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:16:33,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:16:33,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:16:33,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:16:33,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:16:33,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:16:33,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:16:33,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:16:33,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:16:33,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:16:33,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:16:33,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:16:33,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:16:33,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:16:33,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:16:34,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:16:34,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:16:34,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:16:34,302 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:16:34,302 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:16:34,303 INFO L432 ainManager$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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:16:34,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0a5a24cb/af749db81c8f4e57a3fcd47107647107/FLAGe8feeb475 [2020-10-28 00:16:35,079 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:16:35,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:16:35,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0a5a24cb/af749db81c8f4e57a3fcd47107647107/FLAGe8feeb475 [2020-10-28 00:16:35,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0a5a24cb/af749db81c8f4e57a3fcd47107647107 [2020-10-28 00:16:35,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:16:35,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:16:35,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:16:35,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:16:35,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:16:35,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9d34fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35, skipping insertion in model container [2020-10-28 00:16:35,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:16:35,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:16:35,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:16:35,771 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:16:35,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:16:35,895 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:16:35,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35 WrapperNode [2020-10-28 00:16:35,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:16:35,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:16:35,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:16:35,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:16:35,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (1/1) ... [2020-10-28 00:16:35,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:16:35,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:16:35,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:16:35,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:16:35,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (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 00:16:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:16:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:16:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:16:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:16:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:16:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:16:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:16:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:16:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:16:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:16:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:16:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:16:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:16:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:16:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:16:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:16:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:16:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:16:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:16:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:16:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:16:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:16:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:16:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:16:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:16:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:16:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:16:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:16:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:16:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:16:36,964 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:16:36,965 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:16:36,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:16:36 BoogieIcfgContainer [2020-10-28 00:16:36,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:16:36,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:16:36,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:16:36,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:16:36,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:16:35" (1/3) ... [2020-10-28 00:16:36,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23461311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:16:36, skipping insertion in model container [2020-10-28 00:16:36,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:16:35" (2/3) ... [2020-10-28 00:16:36,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23461311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:16:36, skipping insertion in model container [2020-10-28 00:16:36,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:16:36" (3/3) ... [2020-10-28 00:16:36,981 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:16:36,997 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:16:37,004 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:16:37,022 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:16:37,071 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:16:37,071 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:16:37,071 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:16:37,072 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:16:37,072 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:16:37,072 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:16:37,072 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:16:37,072 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:16:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2020-10-28 00:16:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:16:37,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:37,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:37,124 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:37,135 INFO L82 PathProgramCache]: Analyzing trace with hash -144079420, now seen corresponding path program 1 times [2020-10-28 00:16:37,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:37,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53614692] [2020-10-28 00:16:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:37,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:37,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:37,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:38,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:42,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:42,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:16:42,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:16:42,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:16:42,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:42,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:16:42,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 00:16:42,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:16:42,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:16:42,914 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:16:42,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:42,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:43,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:43,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:43,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:43,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 00:16:43,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:43,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:43,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:43,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:43,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:16:43,055 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 00:16:43,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53614692] [2020-10-28 00:16:43,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:43,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:16:43,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001337918] [2020-10-28 00:16:43,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:16:43,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:16:43,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:16:43,094 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 4 states. [2020-10-28 00:16:43,504 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:16:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:44,454 INFO L93 Difference]: Finished difference Result 341 states and 543 transitions. [2020-10-28 00:16:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:16:44,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:16:44,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:44,473 INFO L225 Difference]: With dead ends: 341 [2020-10-28 00:16:44,473 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 00:16:44,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:16:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 00:16:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-28 00:16:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 00:16:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 330 transitions. [2020-10-28 00:16:44,552 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 330 transitions. Word has length 66 [2020-10-28 00:16:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:44,553 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 330 transitions. [2020-10-28 00:16:44,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:16:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 330 transitions. [2020-10-28 00:16:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:16:44,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:44,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:44,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:16:44,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:44,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1439247370, now seen corresponding path program 1 times [2020-10-28 00:16:44,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:44,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60113744] [2020-10-28 00:16:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:44,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:44,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:44,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:45,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:46,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:46,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:16:46,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:16:46,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2111 [2020-10-28 00:16:46,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:16:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:16:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:16:46,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 00:16:47,099 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:16:47,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:47,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:47,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:47,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:47,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:47,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:16:47,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:47,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:47,157 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 00:16:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60113744] [2020-10-28 00:16:47,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:47,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:16:47,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196019899] [2020-10-28 00:16:47,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:16:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:47,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:16:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:16:47,173 INFO L87 Difference]: Start difference. First operand 222 states and 330 transitions. Second operand 4 states. [2020-10-28 00:16:47,452 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:16:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:48,175 INFO L93 Difference]: Finished difference Result 556 states and 860 transitions. [2020-10-28 00:16:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:16:48,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:16:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:48,180 INFO L225 Difference]: With dead ends: 556 [2020-10-28 00:16:48,180 INFO L226 Difference]: Without dead ends: 373 [2020-10-28 00:16:48,183 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 00:16:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-28 00:16:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2020-10-28 00:16:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-28 00:16:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 565 transitions. [2020-10-28 00:16:48,221 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 565 transitions. Word has length 67 [2020-10-28 00:16:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:48,221 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 565 transitions. [2020-10-28 00:16:48,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:16:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 565 transitions. [2020-10-28 00:16:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:16:48,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:48,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:48,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:16:48,225 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2023945435, now seen corresponding path program 1 times [2020-10-28 00:16:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:48,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686510981] [2020-10-28 00:16:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:48,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:48,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:48,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:49,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:49,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:16:49,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:16:49,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-28 00:16:49,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:49,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:16:49,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:16:49,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:16:49,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:16:49,492 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:16:49,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:49,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:49,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:49,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:49,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:16:49,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:49,545 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 00:16:49,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686510981] [2020-10-28 00:16:49,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:49,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:16:49,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815818721] [2020-10-28 00:16:49,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:16:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:16:49,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:16:49,550 INFO L87 Difference]: Start difference. First operand 370 states and 565 transitions. Second operand 4 states. [2020-10-28 00:16:49,874 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:16:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:50,726 INFO L93 Difference]: Finished difference Result 968 states and 1513 transitions. [2020-10-28 00:16:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:16:50,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:16:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:50,732 INFO L225 Difference]: With dead ends: 968 [2020-10-28 00:16:50,732 INFO L226 Difference]: Without dead ends: 637 [2020-10-28 00:16:50,734 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 00:16:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-10-28 00:16:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 634. [2020-10-28 00:16:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2020-10-28 00:16:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 981 transitions. [2020-10-28 00:16:50,781 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 981 transitions. Word has length 68 [2020-10-28 00:16:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:50,782 INFO L481 AbstractCegarLoop]: Abstraction has 634 states and 981 transitions. [2020-10-28 00:16:50,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:16:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 981 transitions. [2020-10-28 00:16:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:16:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:50,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:50,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:16:50,789 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1467312907, now seen corresponding path program 1 times [2020-10-28 00:16:50,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:50,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058452534] [2020-10-28 00:16:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:50,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:51,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:16:51,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:16:51,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-28 00:16:51,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:51,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:16:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:16:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:16:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:16:51,731 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:16:51,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:51,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:51,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:51,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:51,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:16:51,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:51,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:51,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:51,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:51,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:51,787 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 00:16:51,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058452534] [2020-10-28 00:16:51,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:51,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:16:51,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747167770] [2020-10-28 00:16:51,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:16:51,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:16:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:16:51,791 INFO L87 Difference]: Start difference. First operand 634 states and 981 transitions. Second operand 4 states. [2020-10-28 00:16:52,095 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:16:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:53,006 INFO L93 Difference]: Finished difference Result 1696 states and 2657 transitions. [2020-10-28 00:16:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:16:53,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:16:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:53,018 INFO L225 Difference]: With dead ends: 1696 [2020-10-28 00:16:53,018 INFO L226 Difference]: Without dead ends: 1101 [2020-10-28 00:16:53,020 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 00:16:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-10-28 00:16:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1098. [2020-10-28 00:16:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-10-28 00:16:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1705 transitions. [2020-10-28 00:16:53,098 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1705 transitions. Word has length 69 [2020-10-28 00:16:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:53,098 INFO L481 AbstractCegarLoop]: Abstraction has 1098 states and 1705 transitions. [2020-10-28 00:16:53,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:16:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1705 transitions. [2020-10-28 00:16:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:16:53,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:53,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:53,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:16:53,102 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash -28463610, now seen corresponding path program 1 times [2020-10-28 00:16:53,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:53,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075680784] [2020-10-28 00:16:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:53,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:53,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:54,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:54,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:16:54,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:16:54,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-28 00:16:54,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:16:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:16:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 00:16:54,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:54,974 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:16:54,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:55,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:55,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:55,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:55,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:16:55,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:55,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:55,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:55,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:55,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:55,029 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 00:16:55,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075680784] [2020-10-28 00:16:55,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:55,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:16:55,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526798812] [2020-10-28 00:16:55,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:16:55,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:55,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:16:55,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:16:55,032 INFO L87 Difference]: Start difference. First operand 1098 states and 1705 transitions. Second operand 8 states. [2020-10-28 00:16:55,420 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:16:56,619 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 00:16:56,930 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:16:57,250 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 00:16:57,573 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-28 00:16:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:57,873 INFO L93 Difference]: Finished difference Result 7452 states and 11701 transitions. [2020-10-28 00:16:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:16:57,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-28 00:16:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:57,908 INFO L225 Difference]: With dead ends: 7452 [2020-10-28 00:16:57,909 INFO L226 Difference]: Without dead ends: 6393 [2020-10-28 00:16:57,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-28 00:16:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2020-10-28 00:16:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 2154. [2020-10-28 00:16:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2154 states. [2020-10-28 00:16:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3337 transitions. [2020-10-28 00:16:58,174 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3337 transitions. Word has length 70 [2020-10-28 00:16:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:58,176 INFO L481 AbstractCegarLoop]: Abstraction has 2154 states and 3337 transitions. [2020-10-28 00:16:58,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:16:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3337 transitions. [2020-10-28 00:16:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:16:58,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:58,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:58,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:16:58,179 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1457190185, now seen corresponding path program 1 times [2020-10-28 00:16:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:58,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903364432] [2020-10-28 00:16:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:58,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:58,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:59,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:59,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:16:59,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:16:59,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-28 00:16:59,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:59,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:16:59,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:16:59,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:16:59,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:59,582 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:16:59,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:59,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:59,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:59,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:59,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:59,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:16:59,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:59,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:59,622 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 00:16:59,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903364432] [2020-10-28 00:16:59,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:59,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:16:59,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624184842] [2020-10-28 00:16:59,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:16:59,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:16:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:16:59,625 INFO L87 Difference]: Start difference. First operand 2154 states and 3337 transitions. Second operand 5 states. [2020-10-28 00:17:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:00,807 INFO L93 Difference]: Finished difference Result 4333 states and 6699 transitions. [2020-10-28 00:17:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:17:00,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 00:17:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:00,830 INFO L225 Difference]: With dead ends: 4333 [2020-10-28 00:17:00,831 INFO L226 Difference]: Without dead ends: 4330 [2020-10-28 00:17:00,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:17:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2020-10-28 00:17:01,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 2218. [2020-10-28 00:17:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2218 states. [2020-10-28 00:17:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3401 transitions. [2020-10-28 00:17:01,070 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3401 transitions. Word has length 71 [2020-10-28 00:17:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:01,071 INFO L481 AbstractCegarLoop]: Abstraction has 2218 states and 3401 transitions. [2020-10-28 00:17:01,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:17:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3401 transitions. [2020-10-28 00:17:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:17:01,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:01,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:17:01,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:17:01,079 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1925313705, now seen corresponding path program 1 times [2020-10-28 00:17:01,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:01,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665737844] [2020-10-28 00:17:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:01,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:01,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:01,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:17:01,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:17:01,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-28 00:17:01,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:01,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:17:01,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:17:01,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 00:17:01,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:02,251 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:17:02,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:02,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:02,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:02,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:02,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:02,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:17:02,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:02,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:02,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:02,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:02,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:02,319 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 00:17:02,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665737844] [2020-10-28 00:17:02,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:02,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:17:02,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171720254] [2020-10-28 00:17:02,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:17:02,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:17:02,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:17:02,322 INFO L87 Difference]: Start difference. First operand 2218 states and 3401 transitions. Second operand 8 states. [2020-10-28 00:17:03,380 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 00:17:03,709 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 00:17:04,031 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:17:04,308 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 00:17:04,595 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:17:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:06,265 INFO L93 Difference]: Finished difference Result 11673 states and 17843 transitions. [2020-10-28 00:17:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:17:06,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-28 00:17:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:06,325 INFO L225 Difference]: With dead ends: 11673 [2020-10-28 00:17:06,325 INFO L226 Difference]: Without dead ends: 9494 [2020-10-28 00:17:06,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:17:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9494 states. [2020-10-28 00:17:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9494 to 9482. [2020-10-28 00:17:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9482 states. [2020-10-28 00:17:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9482 states to 9482 states and 14441 transitions. [2020-10-28 00:17:07,220 INFO L78 Accepts]: Start accepts. Automaton has 9482 states and 14441 transitions. Word has length 72 [2020-10-28 00:17:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:07,221 INFO L481 AbstractCegarLoop]: Abstraction has 9482 states and 14441 transitions. [2020-10-28 00:17:07,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:17:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 9482 states and 14441 transitions. [2020-10-28 00:17:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:17:07,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:07,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:17:07,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:17:07,224 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:07,225 INFO L82 PathProgramCache]: Analyzing trace with hash -779262329, now seen corresponding path program 1 times [2020-10-28 00:17:07,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:07,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124594092] [2020-10-28 00:17:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:07,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:07,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:07,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:07,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:17:07,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:17:07,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-28 00:17:07,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:07,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:17:07,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:17:07,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:17:07,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:07,899 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:17:07,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:07,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:07,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:07,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:07,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:07,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:17:07,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:07,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:17:07,987 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 00:17:07,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124594092] [2020-10-28 00:17:07,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:07,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:17:07,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723671833] [2020-10-28 00:17:07,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:17:07,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:07,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:17:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:17:07,991 INFO L87 Difference]: Start difference. First operand 9482 states and 14441 transitions. Second operand 4 states. [2020-10-28 00:17:08,321 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:17:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:10,308 INFO L93 Difference]: Finished difference Result 25648 states and 38861 transitions. [2020-10-28 00:17:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:17:10,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:17:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:10,379 INFO L225 Difference]: With dead ends: 25648 [2020-10-28 00:17:10,379 INFO L226 Difference]: Without dead ends: 16205 [2020-10-28 00:17:10,398 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 00:17:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16205 states. [2020-10-28 00:17:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16205 to 16202. [2020-10-28 00:17:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16202 states. [2020-10-28 00:17:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16202 states to 16202 states and 24297 transitions. [2020-10-28 00:17:11,995 INFO L78 Accepts]: Start accepts. Automaton has 16202 states and 24297 transitions. Word has length 73 [2020-10-28 00:17:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:11,996 INFO L481 AbstractCegarLoop]: Abstraction has 16202 states and 24297 transitions. [2020-10-28 00:17:11,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:17:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 16202 states and 24297 transitions. [2020-10-28 00:17:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 00:17:11,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:11,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:17:11,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:17:11,998 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:11,999 INFO L82 PathProgramCache]: Analyzing trace with hash 57221440, now seen corresponding path program 1 times [2020-10-28 00:17:11,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:12,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923281911] [2020-10-28 00:17:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:12,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:12,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:12,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 00:17:12,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:17:12,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-28 00:17:12,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:12,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:17:12,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:17:12,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 00:17:12,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:17:12,932 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:17:12,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:12,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:12,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:12,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:12,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:12,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:17:12,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:12,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:12,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:12,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:17:13,003 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 00:17:13,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923281911] [2020-10-28 00:17:13,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:13,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:17:13,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354303675] [2020-10-28 00:17:13,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:17:13,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:17:13,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:17:13,007 INFO L87 Difference]: Start difference. First operand 16202 states and 24297 transitions. Second operand 4 states. [2020-10-28 00:17:13,479 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:17:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:15,589 INFO L93 Difference]: Finished difference Result 39970 states and 59967 transitions. [2020-10-28 00:17:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:17:15,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 00:17:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:15,764 INFO L225 Difference]: With dead ends: 39970 [2020-10-28 00:17:15,764 INFO L226 Difference]: Without dead ends: 23807 [2020-10-28 00:17:15,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:17:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23807 states. [2020-10-28 00:17:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23807 to 23660. [2020-10-28 00:17:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23660 states. [2020-10-28 00:17:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23660 states to 23660 states and 35275 transitions. [2020-10-28 00:17:17,547 INFO L78 Accepts]: Start accepts. Automaton has 23660 states and 35275 transitions. Word has length 74 [2020-10-28 00:17:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:17,547 INFO L481 AbstractCegarLoop]: Abstraction has 23660 states and 35275 transitions. [2020-10-28 00:17:17,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:17:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23660 states and 35275 transitions. [2020-10-28 00:17:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 00:17:17,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:17,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:17:17,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:17:17,562 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1946097465, now seen corresponding path program 1 times [2020-10-28 00:17:17,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:17,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581501118] [2020-10-28 00:17:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:17,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:17,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:17,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:17,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:17,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:19,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:19,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:20,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:20,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:21,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:22,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:22,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 00:17:22,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:17:22,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 00:17:22,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:17:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 00:17:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:17:22,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:22,952 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:17:22,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:22,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:22,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:22,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:22,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:22,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:17:22,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:22,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:17:22,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581501118] [2020-10-28 00:17:22,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:22,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:17:23,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330425660] [2020-10-28 00:17:23,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:17:23,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:23,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:17:23,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:17:23,001 INFO L87 Difference]: Start difference. First operand 23660 states and 35275 transitions. Second operand 4 states. [2020-10-28 00:17:23,308 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:17:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:26,028 INFO L93 Difference]: Finished difference Result 59771 states and 89056 transitions. [2020-10-28 00:17:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:17:26,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-28 00:17:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:26,120 INFO L225 Difference]: With dead ends: 59771 [2020-10-28 00:17:26,121 INFO L226 Difference]: Without dead ends: 39672 [2020-10-28 00:17:26,162 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 00:17:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39672 states. [2020-10-28 00:17:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39672 to 38149. [2020-10-28 00:17:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38149 states. [2020-10-28 00:17:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38149 states to 38149 states and 56412 transitions. [2020-10-28 00:17:29,197 INFO L78 Accepts]: Start accepts. Automaton has 38149 states and 56412 transitions. Word has length 101 [2020-10-28 00:17:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:29,198 INFO L481 AbstractCegarLoop]: Abstraction has 38149 states and 56412 transitions. [2020-10-28 00:17:29,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:17:29,198 INFO L276 IsEmpty]: Start isEmpty. Operand 38149 states and 56412 transitions. [2020-10-28 00:17:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 00:17:29,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:29,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:17:29,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:17:29,220 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:29,221 INFO L82 PathProgramCache]: Analyzing trace with hash -3822940, now seen corresponding path program 1 times [2020-10-28 00:17:29,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:29,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981647712] [2020-10-28 00:17:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:29,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:30,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:34,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:34,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 00:17:34,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:17:34,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:17:34,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:17:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 00:17:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:17:34,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:34,561 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:17:34,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:34,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:34,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:34,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:34,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:17:34,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:34,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:34,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:34,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:34,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:17:34,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981647712] [2020-10-28 00:17:34,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:34,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:17:34,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137430528] [2020-10-28 00:17:34,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:17:34,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:17:34,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:17:34,612 INFO L87 Difference]: Start difference. First operand 38149 states and 56412 transitions. Second operand 4 states. [2020-10-28 00:17:34,905 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:17:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:38,774 INFO L93 Difference]: Finished difference Result 88933 states and 131229 transitions. [2020-10-28 00:17:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:17:38,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-28 00:17:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:38,891 INFO L225 Difference]: With dead ends: 88933 [2020-10-28 00:17:38,891 INFO L226 Difference]: Without dead ends: 59506 [2020-10-28 00:17:38,940 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 00:17:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59506 states. [2020-10-28 00:17:43,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59506 to 57663. [2020-10-28 00:17:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57663 states. [2020-10-28 00:17:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57663 states to 57663 states and 84401 transitions. [2020-10-28 00:17:43,293 INFO L78 Accepts]: Start accepts. Automaton has 57663 states and 84401 transitions. Word has length 101 [2020-10-28 00:17:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:43,293 INFO L481 AbstractCegarLoop]: Abstraction has 57663 states and 84401 transitions. [2020-10-28 00:17:43,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:17:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 57663 states and 84401 transitions. [2020-10-28 00:17:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 00:17:43,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:43,321 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:17:43,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:17:43,322 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1408840997, now seen corresponding path program 1 times [2020-10-28 00:17:43,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:43,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684633490] [2020-10-28 00:17:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:43,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:43,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:43,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:43,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:43,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:43,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:45,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:48,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:48,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 00:17:48,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:17:48,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:17:48,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:17:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 00:17:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:17:48,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:48,690 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:17:48,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:48,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:48,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:48,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:48,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:48,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 00:17:48,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:48,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:48,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:48,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:48,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:17:48,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684633490] [2020-10-28 00:17:48,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:48,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:17:48,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318039305] [2020-10-28 00:17:48,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:17:48,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:48,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:17:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:17:48,780 INFO L87 Difference]: Start difference. First operand 57663 states and 84401 transitions. Second operand 4 states. [2020-10-28 00:17:49,128 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:17:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:54,842 INFO L93 Difference]: Finished difference Result 119504 states and 174394 transitions. [2020-10-28 00:17:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:17:54,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-28 00:17:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:55,077 INFO L225 Difference]: With dead ends: 119504 [2020-10-28 00:17:55,078 INFO L226 Difference]: Without dead ends: 81229 [2020-10-28 00:17:55,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:17:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81229 states. [2020-10-28 00:18:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81229 to 77522. [2020-10-28 00:18:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77522 states. [2020-10-28 00:18:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77522 states to 77522 states and 112226 transitions. [2020-10-28 00:18:00,544 INFO L78 Accepts]: Start accepts. Automaton has 77522 states and 112226 transitions. Word has length 101 [2020-10-28 00:18:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:00,544 INFO L481 AbstractCegarLoop]: Abstraction has 77522 states and 112226 transitions. [2020-10-28 00:18:00,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 77522 states and 112226 transitions. [2020-10-28 00:18:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 00:18:00,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:00,576 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:18:00,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:18:00,576 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:00,577 INFO L82 PathProgramCache]: Analyzing trace with hash -798167876, now seen corresponding path program 1 times [2020-10-28 00:18:00,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:00,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594554362] [2020-10-28 00:18:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:00,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:00,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:01,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:01,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:02,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:05,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:05,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 00:18:05,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:18:05,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:18:05,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 00:18:05,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:18:05,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:06,009 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:18:06,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:06,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:06,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:06,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:06,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:18:06,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:06,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:06,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:06,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:06,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:06,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594554362] [2020-10-28 00:18:06,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:06,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:06,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411550107] [2020-10-28 00:18:06,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:06,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:06,075 INFO L87 Difference]: Start difference. First operand 77522 states and 112226 transitions. Second operand 4 states. [2020-10-28 00:18:06,480 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:18:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:12,762 INFO L93 Difference]: Finished difference Result 126817 states and 182755 transitions. [2020-10-28 00:18:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:12,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-28 00:18:12,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:12,890 INFO L225 Difference]: With dead ends: 126817 [2020-10-28 00:18:12,890 INFO L226 Difference]: Without dead ends: 81334 [2020-10-28 00:18:12,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81334 states. [2020-10-28 00:18:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81334 to 78566. [2020-10-28 00:18:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78566 states. [2020-10-28 00:18:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78566 states to 78566 states and 112351 transitions. [2020-10-28 00:18:18,803 INFO L78 Accepts]: Start accepts. Automaton has 78566 states and 112351 transitions. Word has length 101 [2020-10-28 00:18:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:18,804 INFO L481 AbstractCegarLoop]: Abstraction has 78566 states and 112351 transitions. [2020-10-28 00:18:18,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 78566 states and 112351 transitions. [2020-10-28 00:18:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 00:18:19,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:19,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:19,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:18:19,004 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:19,005 INFO L82 PathProgramCache]: Analyzing trace with hash -923011616, now seen corresponding path program 1 times [2020-10-28 00:18:19,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:19,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558021245] [2020-10-28 00:18:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:19,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:19,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:19,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:19,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 00:18:19,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:19,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-28 00:18:19,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:19,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:18:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:18:19,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 00:18:19,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:18:20,040 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:18:20,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:20,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:20,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:20,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:20,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:18:20,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:20,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:20,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:20,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:20,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:18:20,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558021245] [2020-10-28 00:18:20,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:18:20,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:18:20,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546140154] [2020-10-28 00:18:20,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:18:20,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:20,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:18:20,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:20,097 INFO L87 Difference]: Start difference. First operand 78566 states and 112351 transitions. Second operand 5 states. [2020-10-28 00:18:20,439 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:22,478 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:18:22,927 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:18:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:30,801 INFO L93 Difference]: Finished difference Result 182036 states and 260991 transitions. [2020-10-28 00:18:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:18:30,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-28 00:18:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:31,148 INFO L225 Difference]: With dead ends: 182036 [2020-10-28 00:18:31,148 INFO L226 Difference]: Without dead ends: 128941 [2020-10-28 00:18:31,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:18:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128941 states. [2020-10-28 00:18:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128941 to 127969. [2020-10-28 00:18:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127969 states. [2020-10-28 00:18:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127969 states to 127969 states and 181611 transitions. [2020-10-28 00:18:40,303 INFO L78 Accepts]: Start accepts. Automaton has 127969 states and 181611 transitions. Word has length 101 [2020-10-28 00:18:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:40,304 INFO L481 AbstractCegarLoop]: Abstraction has 127969 states and 181611 transitions. [2020-10-28 00:18:40,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:18:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 127969 states and 181611 transitions. [2020-10-28 00:18:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 00:18:40,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:40,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:40,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:18:40,326 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:40,327 INFO L82 PathProgramCache]: Analyzing trace with hash -637483701, now seen corresponding path program 1 times [2020-10-28 00:18:40,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:40,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878400740] [2020-10-28 00:18:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:40,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:40,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:40,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:40,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:40,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:45,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:45,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 00:18:45,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:18:45,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:18:45,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:45,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:45,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 00:18:45,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:18:45,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:45,687 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:18:45,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:45,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:45,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:45,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:45,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:18:45,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:45,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:45,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:45,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:45,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:45,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878400740] [2020-10-28 00:18:45,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:45,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401867677] [2020-10-28 00:18:45,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:45,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:45,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:45,728 INFO L87 Difference]: Start difference. First operand 127969 states and 181611 transitions. Second operand 4 states. [2020-10-28 00:18:49,215 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 00:18:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:53,495 INFO L93 Difference]: Finished difference Result 218447 states and 309862 transitions. [2020-10-28 00:18:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:53,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-28 00:18:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:53,638 INFO L225 Difference]: With dead ends: 218447 [2020-10-28 00:18:53,638 INFO L226 Difference]: Without dead ends: 90674 [2020-10-28 00:18:53,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 00:18:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90674 states. [2020-10-28 00:19:00,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90674 to 90476. [2020-10-28 00:19:00,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90476 states. [2020-10-28 00:19:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90476 states to 90476 states and 127142 transitions. [2020-10-28 00:19:00,353 INFO L78 Accepts]: Start accepts. Automaton has 90476 states and 127142 transitions. Word has length 101 [2020-10-28 00:19:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:00,354 INFO L481 AbstractCegarLoop]: Abstraction has 90476 states and 127142 transitions. [2020-10-28 00:19:00,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 90476 states and 127142 transitions. [2020-10-28 00:19:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 00:19:00,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:00,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:00,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:19:00,366 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:00,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1057067810, now seen corresponding path program 1 times [2020-10-28 00:19:00,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:00,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055163379] [2020-10-28 00:19:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:00,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:00,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:00,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:00,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:00,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:04,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:04,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 00:19:04,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:04,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3918 [2020-10-28 00:19:04,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:04,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:04,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:04,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:19:04,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:04,627 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:19:04,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:04,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:04,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:04,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:04,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:04,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:19:04,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:04,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:04,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055163379] [2020-10-28 00:19:04,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:19:04,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:19:04,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970205850] [2020-10-28 00:19:04,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:04,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:04,673 INFO L87 Difference]: Start difference. First operand 90476 states and 127142 transitions. Second operand 6 states. [2020-10-28 00:19:06,527 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 00:19:07,244 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-28 00:19:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:16,621 INFO L93 Difference]: Finished difference Result 227283 states and 316519 transitions. [2020-10-28 00:19:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:19:16,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-28 00:19:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:16,852 INFO L225 Difference]: With dead ends: 227283 [2020-10-28 00:19:16,852 INFO L226 Difference]: Without dead ends: 137052 [2020-10-28 00:19:16,927 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 00:19:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137052 states. [2020-10-28 00:19:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137052 to 93288. [2020-10-28 00:19:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93288 states. [2020-10-28 00:19:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93288 states to 93288 states and 128490 transitions. [2020-10-28 00:19:25,246 INFO L78 Accepts]: Start accepts. Automaton has 93288 states and 128490 transitions. Word has length 102 [2020-10-28 00:19:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:25,246 INFO L481 AbstractCegarLoop]: Abstraction has 93288 states and 128490 transitions. [2020-10-28 00:19:25,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:19:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 93288 states and 128490 transitions. [2020-10-28 00:19:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 00:19:25,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:25,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:25,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:19:25,255 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1140927647, now seen corresponding path program 1 times [2020-10-28 00:19:25,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:25,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043182166] [2020-10-28 00:19:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:25,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:25,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:25,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:25,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:27,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:27,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 00:19:27,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:27,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2305 [2020-10-28 00:19:27,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:19:27,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:27,905 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:19:27,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:27,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:27,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:27,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043182166] [2020-10-28 00:19:27,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:19:27,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:19:27,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129564510] [2020-10-28 00:19:27,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:27,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:27,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:27,934 INFO L87 Difference]: Start difference. First operand 93288 states and 128490 transitions. Second operand 6 states. [2020-10-28 00:19:30,135 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 00:19:34,950 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-28 00:19:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:44,163 INFO L93 Difference]: Finished difference Result 265361 states and 363366 transitions. [2020-10-28 00:19:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 00:19:44,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-28 00:19:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:44,450 INFO L225 Difference]: With dead ends: 265361 [2020-10-28 00:19:44,450 INFO L226 Difference]: Without dead ends: 172002 [2020-10-28 00:19:44,547 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 00:19:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172002 states. [2020-10-28 00:19:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172002 to 118597. [2020-10-28 00:19:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118597 states. [2020-10-28 00:19:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118597 states to 118597 states and 159196 transitions. [2020-10-28 00:19:55,778 INFO L78 Accepts]: Start accepts. Automaton has 118597 states and 159196 transitions. Word has length 102 [2020-10-28 00:19:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:55,779 INFO L481 AbstractCegarLoop]: Abstraction has 118597 states and 159196 transitions. [2020-10-28 00:19:55,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:19:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 118597 states and 159196 transitions. [2020-10-28 00:19:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 00:19:55,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:55,789 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:55,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:19:55,789 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash -538102963, now seen corresponding path program 1 times [2020-10-28 00:19:55,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:55,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764365379] [2020-10-28 00:19:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:55,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:55,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:55,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:56,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:56,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:58,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:58,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 00:19:58,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2254 [2020-10-28 00:19:58,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:19:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:58,380 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 00:19:58,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:58,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:58,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:58,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:58,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:58,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:19:58,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:58,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:58,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:58,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:58,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:58,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764365379] [2020-10-28 00:19:58,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:19:58,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:19:58,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826904757] [2020-10-28 00:19:58,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:58,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:58,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:58,410 INFO L87 Difference]: Start difference. First operand 118597 states and 159196 transitions. Second operand 6 states. [2020-10-28 00:20:00,765 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 00:20:01,735 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 173