/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=SHALLOWEST --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/eca-rers2012/Problem05_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:24:55,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:24:55,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:24:55,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:24:55,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:24:55,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:24:55,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:24:55,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:24:55,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:24:55,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:24:55,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:24:55,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:24:55,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:24:55,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:24:55,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:24:55,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:24:55,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:24:55,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:24:55,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:24:55,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:24:55,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:24:55,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:24:55,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:24:55,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:24:55,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:24:55,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:24:55,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:24:55,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:24:55,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:24:55,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:24:55,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:24:55,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:24:55,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:24:55,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:24:55,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:24:55,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:24:55,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:24:55,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:24:55,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:24:55,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:24:55,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:24:55,739 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 [2020-10-26 21:24:55,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:24:55,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:24:55,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:24:55,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:24:55,811 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:24:55,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:24:55,812 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:24:55,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:24:55,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:24:55,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:24:55,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:24:55,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:24:55,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:24:55,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:24:55,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:24:55,815 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:24:55,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:24:55,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:24:55,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:24:55,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:24:55,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:24:55,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:24:55,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:24:55,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:24:55,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:24:55,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:24:55,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:24:55,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:24:55,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:24:55,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:24:56,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:24:56,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:24:56,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:24:56,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:24:56,304 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:24:56,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label57.c [2020-10-26 21:24:56,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a10d43cee/361f64a1cd814d7ea196584f426083dc/FLAGfb16a3d21 [2020-10-26 21:24:57,703 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:24:57,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label57.c [2020-10-26 21:24:57,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a10d43cee/361f64a1cd814d7ea196584f426083dc/FLAGfb16a3d21 [2020-10-26 21:24:57,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a10d43cee/361f64a1cd814d7ea196584f426083dc [2020-10-26 21:24:57,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:24:57,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:24:57,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:24:57,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:24:57,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:24:57,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:24:57" (1/1) ... [2020-10-26 21:24:57,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e23019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:57, skipping insertion in model container [2020-10-26 21:24:57,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:24:57" (1/1) ... [2020-10-26 21:24:57,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:24:58,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:25:00,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:25:00,626 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:25:02,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:25:02,108 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:25:02,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02 WrapperNode [2020-10-26 21:25:02,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:25:02,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:25:02,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:25:02,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:25:02,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (1/1) ... [2020-10-26 21:25:02,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (1/1) ... [2020-10-26 21:25:02,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (1/1) ... [2020-10-26 21:25:02,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (1/1) ... [2020-10-26 21:25:02,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (1/1) ... [2020-10-26 21:25:02,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (1/1) ... [2020-10-26 21:25:02,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (1/1) ... [2020-10-26 21:25:02,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:25:02,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:25:02,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:25:02,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:25:02,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (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 [2020-10-26 21:25:02,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:25:02,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:25:02,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:25:02,938 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:25:02,938 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:25:02,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:25:02,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:25:02,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:25:02,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-26 21:25:02,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-26 21:25:02,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-26 21:25:02,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:25:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:25:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:25:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:25:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:25:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:25:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-26 21:25:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-26 21:25:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-26 21:25:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:25:02,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:25:02,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:25:02,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:25:02,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:25:02,942 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:25:02,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:25:02,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:25:02,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:25:02,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:25:02,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:25:02,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:25:02,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:25:13,253 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:25:13,253 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:25:13,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:25:13 BoogieIcfgContainer [2020-10-26 21:25:13,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:25:13,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:25:13,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:25:13,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:25:13,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:24:57" (1/3) ... [2020-10-26 21:25:13,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748950e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:25:13, skipping insertion in model container [2020-10-26 21:25:13,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:25:02" (2/3) ... [2020-10-26 21:25:13,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748950e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:25:13, skipping insertion in model container [2020-10-26 21:25:13,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:25:13" (3/3) ... [2020-10-26 21:25:13,269 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label57.c [2020-10-26 21:25:13,282 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:25:13,289 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:25:13,304 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:25:13,345 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:25:13,345 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:25:13,345 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:25:13,345 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:25:13,345 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:25:13,346 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:25:13,346 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:25:13,346 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:25:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-26 21:25:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1656 [2020-10-26 21:25:13,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:25:13,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:25:13,524 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:25:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:25:13,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1369444433, now seen corresponding path program 1 times [2020-10-26 21:25:13,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:25:13,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851627056] [2020-10-26 21:25:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:25:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:25:15,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:25:20,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:25:20,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1679 [2020-10-26 21:25:20,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:25:20,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5347 [2020-10-26 21:25:20,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:25:20,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 21:25:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:25:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1670 [2020-10-26 21:25:20,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:25:22,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:25:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:25:22,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:25:22,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:25:22,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:25:22,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:25:22,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 21:25:22,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:25:22,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:25:22,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:25:22,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:25:22,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:25:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:25:25,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851627056] [2020-10-26 21:25:25,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:25:25,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 21:25:25,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715783707] [2020-10-26 21:25:25,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 21:25:25,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:25:25,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 21:25:25,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 21:25:25,481 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-26 21:25:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:25:47,084 INFO L93 Difference]: Finished difference Result 6365 states and 11967 transitions. [2020-10-26 21:25:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 21:25:47,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1655 [2020-10-26 21:25:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:25:47,140 INFO L225 Difference]: With dead ends: 6365 [2020-10-26 21:25:47,140 INFO L226 Difference]: Without dead ends: 4075 [2020-10-26 21:25:47,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:25:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-26 21:25:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4005. [2020-10-26 21:25:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4005 states. [2020-10-26 21:25:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 6505 transitions. [2020-10-26 21:25:47,413 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 6505 transitions. Word has length 1655 [2020-10-26 21:25:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:25:47,420 INFO L481 AbstractCegarLoop]: Abstraction has 4005 states and 6505 transitions. [2020-10-26 21:25:47,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 21:25:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 6505 transitions. [2020-10-26 21:25:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1667 [2020-10-26 21:25:47,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:25:47,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:25:47,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:25:47,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:25:47,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:25:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash 171508825, now seen corresponding path program 1 times [2020-10-26 21:25:47,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:25:47,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134382809] [2020-10-26 21:25:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:25:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:25:48,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:25:49,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:25:53,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:25:53,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1692 [2020-10-26 21:25:53,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:25:53,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-26 21:25:53,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:25:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:25:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:25:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 21:25:53,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:25:53,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:25:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:25:53,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:25:53,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:25:53,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:25:53,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:25:53,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 21:25:53,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:25:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:25:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:25:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:25:53,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:25:53,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:25:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:25:53,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:25:53,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:25:53,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 21:25:53,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:25:53,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 21:25:53,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:25:53,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:25:53,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:25:53,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 21:25:53,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:25:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:25:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134382809] [2020-10-26 21:25:55,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:25:55,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:25:55,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956015382] [2020-10-26 21:25:55,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:25:55,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:25:55,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:25:55,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:25:55,478 INFO L87 Difference]: Start difference. First operand 4005 states and 6505 transitions. Second operand 7 states. [2020-10-26 21:26:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:26:22,416 INFO L93 Difference]: Finished difference Result 11842 states and 19356 transitions. [2020-10-26 21:26:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:26:22,416 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1666 [2020-10-26 21:26:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:26:22,461 INFO L225 Difference]: With dead ends: 11842 [2020-10-26 21:26:22,462 INFO L226 Difference]: Without dead ends: 7843 [2020-10-26 21:26:22,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:26:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2020-10-26 21:26:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 7669. [2020-10-26 21:26:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7669 states. [2020-10-26 21:26:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7669 states to 7669 states and 10662 transitions. [2020-10-26 21:26:22,712 INFO L78 Accepts]: Start accepts. Automaton has 7669 states and 10662 transitions. Word has length 1666 [2020-10-26 21:26:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:26:22,713 INFO L481 AbstractCegarLoop]: Abstraction has 7669 states and 10662 transitions. [2020-10-26 21:26:22,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:26:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7669 states and 10662 transitions. [2020-10-26 21:26:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1678 [2020-10-26 21:26:22,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:26:22,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:26:22,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:26:22,757 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:26:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:26:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1724520272, now seen corresponding path program 1 times [2020-10-26 21:26:22,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:26:22,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619087291] [2020-10-26 21:26:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:26:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:26:23,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:26:23,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:26:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:26:28,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:26:28,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1703 [2020-10-26 21:26:28,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:26:28,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-26 21:26:28,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:26:28,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:26:28,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:26:28,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 21:26:28,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:26:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:26:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:26:29,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:26:29,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:26:29,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:26:29,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:26:29,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 21:26:29,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:26:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:26:29,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:26:29,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:26:29,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:26:29,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:26:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:26:29,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:26:29,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:26:29,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 21:26:29,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:26:29,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 21:26:29,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:26:29,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:26:29,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:26:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 21:26:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:26:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:26:31,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619087291] [2020-10-26 21:26:31,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:26:31,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:26:31,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267665161] [2020-10-26 21:26:31,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:26:31,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:26:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:26:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:26:31,052 INFO L87 Difference]: Start difference. First operand 7669 states and 10662 transitions. Second operand 7 states. [2020-10-26 21:26:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:26:57,551 INFO L93 Difference]: Finished difference Result 19701 states and 27525 transitions. [2020-10-26 21:26:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 21:26:57,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1677 [2020-10-26 21:26:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:26:57,632 INFO L225 Difference]: With dead ends: 19701 [2020-10-26 21:26:57,632 INFO L226 Difference]: Without dead ends: 12038 [2020-10-26 21:26:57,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 21:26:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12038 states. [2020-10-26 21:26:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12038 to 11581. [2020-10-26 21:26:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11581 states. [2020-10-26 21:26:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11581 states to 11581 states and 15018 transitions. [2020-10-26 21:26:58,187 INFO L78 Accepts]: Start accepts. Automaton has 11581 states and 15018 transitions. Word has length 1677 [2020-10-26 21:26:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:26:58,192 INFO L481 AbstractCegarLoop]: Abstraction has 11581 states and 15018 transitions. [2020-10-26 21:26:58,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:26:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 11581 states and 15018 transitions. [2020-10-26 21:26:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1710 [2020-10-26 21:26:58,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:26:58,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:26:58,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:26:58,255 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:26:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:26:58,257 INFO L82 PathProgramCache]: Analyzing trace with hash 970275454, now seen corresponding path program 1 times [2020-10-26 21:26:58,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:26:58,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852689162] [2020-10-26 21:26:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:26:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:26:58,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:27:00,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:27:03,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:27:03,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1735 [2020-10-26 21:27:03,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:27:03,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5234 [2020-10-26 21:27:03,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:27:03,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:27:03,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:27:03,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 21:27:03,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:27:04,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:27:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:27:04,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:27:04,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:27:04,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:27:04,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:27:04,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 21:27:04,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:27:04,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:27:04,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:27:04,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:27:04,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:27:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:27:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:27:04,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:27:04,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:27:04,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 21:27:04,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:27:04,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 21:27:04,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:27:04,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:27:04,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:27:04,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 21:27:04,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:27:04,511 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2020-10-26 21:27:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:27:05,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852689162] [2020-10-26 21:27:05,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:27:05,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:27:05,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396739568] [2020-10-26 21:27:05,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:27:05,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:27:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:27:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:27:05,995 INFO L87 Difference]: Start difference. First operand 11581 states and 15018 transitions. Second operand 7 states. [2020-10-26 21:27:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:27:33,552 INFO L93 Difference]: Finished difference Result 34407 states and 45672 transitions. [2020-10-26 21:27:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 21:27:33,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1709 [2020-10-26 21:27:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:27:33,626 INFO L225 Difference]: With dead ends: 34407 [2020-10-26 21:27:33,626 INFO L226 Difference]: Without dead ends: 22832 [2020-10-26 21:27:33,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:27:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22832 states. [2020-10-26 21:27:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22832 to 22684. [2020-10-26 21:27:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22684 states. [2020-10-26 21:27:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22684 states to 22684 states and 28670 transitions. [2020-10-26 21:27:34,203 INFO L78 Accepts]: Start accepts. Automaton has 22684 states and 28670 transitions. Word has length 1709 [2020-10-26 21:27:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:27:34,204 INFO L481 AbstractCegarLoop]: Abstraction has 22684 states and 28670 transitions. [2020-10-26 21:27:34,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:27:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 22684 states and 28670 transitions. [2020-10-26 21:27:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1769 [2020-10-26 21:27:34,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:27:34,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:27:34,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:27:34,292 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:27:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:27:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash 418229707, now seen corresponding path program 1 times [2020-10-26 21:27:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:27:34,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240843550] [2020-10-26 21:27:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:27:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:27:35,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:27:39,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:27:39,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1794 [2020-10-26 21:27:39,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:27:39,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5143 [2020-10-26 21:27:39,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:27:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 21:27:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-26 21:27:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1667 [2020-10-26 21:27:39,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:27:40,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:27:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:27:40,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:27:40,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:27:40,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:27:40,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:27:40,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 21:27:40,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:27:40,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:27:40,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:27:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:27:40,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:27:40,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:27:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:27:40,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:27:41,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:27:41,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 21:27:41,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:27:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 21:27:41,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:27:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:27:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:27:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 21:27:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:27:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 109 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:27:43,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240843550] [2020-10-26 21:27:43,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:27:43,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 21:27:43,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154610243] [2020-10-26 21:27:43,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 21:27:43,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:27:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 21:27:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:27:43,717 INFO L87 Difference]: Start difference. First operand 22684 states and 28670 transitions. Second operand 5 states. [2020-10-26 21:28:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:28:11,285 INFO L93 Difference]: Finished difference Result 59734 states and 78887 transitions. [2020-10-26 21:28:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 21:28:11,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1768 [2020-10-26 21:28:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:28:11,417 INFO L225 Difference]: With dead ends: 59734 [2020-10-26 21:28:11,417 INFO L226 Difference]: Without dead ends: 37056 [2020-10-26 21:28:11,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 21:28:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37056 states. [2020-10-26 21:28:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37056 to 37012. [2020-10-26 21:28:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37012 states. [2020-10-26 21:28:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37012 states to 37012 states and 45478 transitions. [2020-10-26 21:28:12,519 INFO L78 Accepts]: Start accepts. Automaton has 37012 states and 45478 transitions. Word has length 1768 [2020-10-26 21:28:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:28:12,522 INFO L481 AbstractCegarLoop]: Abstraction has 37012 states and 45478 transitions. [2020-10-26 21:28:12,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 21:28:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 37012 states and 45478 transitions. [2020-10-26 21:28:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1809 [2020-10-26 21:28:12,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:28:12,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:28:12,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:28:12,636 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:28:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:28:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash -399410980, now seen corresponding path program 1 times [2020-10-26 21:28:12,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:28:12,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333691305] [2020-10-26 21:28:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:28:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:28:13,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:28:14,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:28:18,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:28:18,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1836 [2020-10-26 21:28:18,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:28:18,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-26 21:28:18,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:28:18,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 21:28:18,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-10-26 21:28:18,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1667 [2020-10-26 21:28:18,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:28:19,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:28:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:28:19,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:28:19,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:28:19,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:28:19,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:28:19,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 21:28:19,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:28:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:28:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:28:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:28:19,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:28:19,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:28:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:28:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:28:19,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:28:19,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 21:28:19,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:28:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 21:28:19,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:28:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:28:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:28:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:28:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:28:19,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-26 21:28:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:28:19,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:28:19,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:28:19,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 21:28:19,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:28:19,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 21:28:19,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:28:19,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:28:19,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:28:19,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 21:28:19,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:28:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-26 21:28:22,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333691305] [2020-10-26 21:28:22,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:28:22,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 21:28:22,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249506388] [2020-10-26 21:28:22,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 21:28:22,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:28:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 21:28:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 21:28:22,222 INFO L87 Difference]: Start difference. First operand 37012 states and 45478 transitions. Second operand 6 states.