/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/Problem04_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:55:15,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:55:15,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:55:15,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:55:15,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:55:15,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:55:15,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:55:15,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:55:15,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:55:15,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:55:15,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:55:15,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:55:15,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:55:15,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:55:15,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:55:15,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:55:15,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:55:15,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:55:15,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:55:15,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:55:15,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:55:15,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:55:15,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:55:15,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:55:15,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:55:15,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:55:15,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:55:15,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:55:15,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:55:15,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:55:15,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:55:15,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:55:15,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:55:15,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:55:15,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:55:15,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:55:15,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:55:15,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:55:15,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:55:15,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:55:15,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:55:15,985 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 20:55:16,036 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:55:16,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:55:16,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:55:16,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:55:16,040 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:55:16,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:55:16,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:55:16,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:55:16,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:55:16,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:55:16,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:55:16,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:55:16,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:55:16,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:55:16,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:55:16,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:55:16,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:55:16,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:55:16,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:55:16,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:55:16,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:55:16,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:55:16,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:55:16,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:55:16,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:55:16,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:55:16,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:55:16,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:55:16,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:55:16,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:55:16,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:55:16,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:55:16,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:55:16,470 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:55:16,471 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:55:16,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label02.c [2020-10-26 20:55:16,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c71eca713/faf711057aa04a3b98fcf10001aa301b/FLAG049503027 [2020-10-26 20:55:17,492 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:55:17,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label02.c [2020-10-26 20:55:17,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c71eca713/faf711057aa04a3b98fcf10001aa301b/FLAG049503027 [2020-10-26 20:55:17,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c71eca713/faf711057aa04a3b98fcf10001aa301b [2020-10-26 20:55:17,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:55:17,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:55:17,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:55:17,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:55:17,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:55:17,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:55:17" (1/1) ... [2020-10-26 20:55:18,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c3986b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:17, skipping insertion in model container [2020-10-26 20:55:18,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:55:17" (1/1) ... [2020-10-26 20:55:18,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:55:18,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:55:19,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:55:19,543 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:55:20,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:55:20,371 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:55:20,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20 WrapperNode [2020-10-26 20:55:20,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:55:20,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:55:20,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:55:20,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:55:20,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (1/1) ... [2020-10-26 20:55:20,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (1/1) ... [2020-10-26 20:55:20,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (1/1) ... [2020-10-26 20:55:20,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (1/1) ... [2020-10-26 20:55:20,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (1/1) ... [2020-10-26 20:55:20,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (1/1) ... [2020-10-26 20:55:20,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (1/1) ... [2020-10-26 20:55:20,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:55:20,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:55:20,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:55:20,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:55:20,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (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 20:55:20,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:55:20,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:55:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:55:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:55:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 20:55:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 20:55:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 20:55:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:55:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:55:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 20:55:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 20:55:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 20:55:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:55:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:55:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:55:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:55:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:55:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:55:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:55:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:55:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:55:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:55:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:55:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:55:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:55:24,958 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:55:24,959 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:55:24,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:55:24 BoogieIcfgContainer [2020-10-26 20:55:24,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:55:24,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:55:24,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:55:24,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:55:24,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:55:17" (1/3) ... [2020-10-26 20:55:24,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9af29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:55:24, skipping insertion in model container [2020-10-26 20:55:24,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:20" (2/3) ... [2020-10-26 20:55:24,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9af29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:55:24, skipping insertion in model container [2020-10-26 20:55:24,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:55:24" (3/3) ... [2020-10-26 20:55:24,971 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label02.c [2020-10-26 20:55:24,983 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:55:24,988 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:55:25,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:55:25,033 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:55:25,034 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:55:25,034 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:55:25,034 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:55:25,034 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:55:25,034 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:55:25,034 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:55:25,034 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:55:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-26 20:55:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2020-10-26 20:55:25,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:25,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:25,117 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2067400440, now seen corresponding path program 1 times [2020-10-26 20:55:25,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:25,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78758882] [2020-10-26 20:55:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:30,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:30,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 831 [2020-10-26 20:55:30,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:30,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 20:55:30,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 20:55:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-26 20:55:30,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:55:33,315 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:55:33,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:33,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:33,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:33,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:33,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:33,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:55:33,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:33,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:37,665 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 20:55:37,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78758882] [2020-10-26 20:55:37,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:55:37,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 20:55:37,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809301430] [2020-10-26 20:55:37,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 20:55:37,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 20:55:37,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-26 20:55:37,692 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 18 states. [2020-10-26 20:55:37,922 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-26 20:55:38,119 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-26 20:55:38,294 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-26 20:55:38,492 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-26 20:55:38,868 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-26 20:55:39,156 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-26 20:55:41,539 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-26 20:55:41,798 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-26 20:55:43,851 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 20:55:44,016 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-26 20:55:45,123 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-26 20:55:48,816 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 20:55:48,972 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 20:55:53,989 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 20:55:54,147 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 20:55:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:56,982 INFO L93 Difference]: Finished difference Result 2553 states and 4911 transitions. [2020-10-26 20:55:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 20:55:56,984 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 815 [2020-10-26 20:55:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:57,037 INFO L225 Difference]: With dead ends: 2553 [2020-10-26 20:55:57,038 INFO L226 Difference]: Without dead ends: 1581 [2020-10-26 20:55:57,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 20:55:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-26 20:55:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2020-10-26 20:55:57,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-26 20:55:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2340 transitions. [2020-10-26 20:55:57,236 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2340 transitions. Word has length 815 [2020-10-26 20:55:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:57,239 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 2340 transitions. [2020-10-26 20:55:57,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 20:55:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2340 transitions. [2020-10-26 20:55:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-10-26 20:55:57,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:57,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:57,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:55:57,273 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:57,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:57,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1048598583, now seen corresponding path program 1 times [2020-10-26 20:55:57,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:57,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045144212] [2020-10-26 20:55:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:57,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:58,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:02,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:02,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 852 [2020-10-26 20:56:02,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:02,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-26 20:56:02,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:02,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:56:02,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:02,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 843 [2020-10-26 20:56:02,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:03,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:03,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:03,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:03,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:03,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:03,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:56:03,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:03,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:03,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:03,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:03,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:03,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:03,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:03,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:56:03,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:03,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:56:03,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:03,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:03,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:03,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:56:03,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:56:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:56:03,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045144212] [2020-10-26 20:56:03,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:03,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:56:03,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321413492] [2020-10-26 20:56:03,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:56:03,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:03,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:56:03,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:56:03,826 INFO L87 Difference]: Start difference. First operand 1581 states and 2340 transitions. Second operand 6 states. [2020-10-26 20:56:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:13,472 INFO L93 Difference]: Finished difference Result 3287 states and 5567 transitions. [2020-10-26 20:56:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:56:13,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 834 [2020-10-26 20:56:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:13,493 INFO L225 Difference]: With dead ends: 3287 [2020-10-26 20:56:13,493 INFO L226 Difference]: Without dead ends: 2439 [2020-10-26 20:56:13,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2020-10-26 20:56:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2428. [2020-10-26 20:56:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2428 states. [2020-10-26 20:56:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 3728 transitions. [2020-10-26 20:56:13,586 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 3728 transitions. Word has length 834 [2020-10-26 20:56:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:13,588 INFO L481 AbstractCegarLoop]: Abstraction has 2428 states and 3728 transitions. [2020-10-26 20:56:13,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:56:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 3728 transitions. [2020-10-26 20:56:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2020-10-26 20:56:13,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:13,625 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:56:13,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:56:13,625 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:13,627 INFO L82 PathProgramCache]: Analyzing trace with hash 288847786, now seen corresponding path program 1 times [2020-10-26 20:56:13,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:13,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339283620] [2020-10-26 20:56:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:13,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:14,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:16,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:18,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:18,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 859 [2020-10-26 20:56:18,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:18,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-26 20:56:18,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:18,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:56:18,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:18,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 850 [2020-10-26 20:56:18,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:19,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:19,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:19,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:19,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:19,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:19,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:56:19,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:19,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:19,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:19,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:19,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:19,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:19,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 20:56:19,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:19,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 20:56:19,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:19,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:19,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:19,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:56:19,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:56:20,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339283620] [2020-10-26 20:56:20,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:20,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:56:20,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106954427] [2020-10-26 20:56:20,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:56:20,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:20,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:56:20,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:56:20,293 INFO L87 Difference]: Start difference. First operand 2428 states and 3728 transitions. Second operand 6 states. [2020-10-26 20:56:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:29,871 INFO L93 Difference]: Finished difference Result 5865 states and 9821 transitions. [2020-10-26 20:56:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:56:29,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 841 [2020-10-26 20:56:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:29,898 INFO L225 Difference]: With dead ends: 5865 [2020-10-26 20:56:29,898 INFO L226 Difference]: Without dead ends: 4170 [2020-10-26 20:56:29,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-10-26 20:56:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4139. [2020-10-26 20:56:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-10-26 20:56:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5976 transitions. [2020-10-26 20:56:30,018 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5976 transitions. Word has length 841 [2020-10-26 20:56:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:30,020 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 5976 transitions. [2020-10-26 20:56:30,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:56:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5976 transitions. [2020-10-26 20:56:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2020-10-26 20:56:30,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:30,037 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:56:30,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:56:30,038 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1317731765, now seen corresponding path program 1 times [2020-10-26 20:56:30,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:30,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146978066] [2020-10-26 20:56:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:30,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:30,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:30,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:32,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:35,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 884 [2020-10-26 20:56:35,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:56:35,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 20:56:35,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:35,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:35,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:35,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:56:35,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:56:35,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:35,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:35,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:35,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:56:35,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:35,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:35,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:35,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:56:35,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:35,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:56:35,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:56:35,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:35,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:56:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:35,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:35,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 20:56:35,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:35,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:56:35,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:56:35,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:35,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 20:56:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:35,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:35,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 20:56:35,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:35,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:56:35,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:35,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:35,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-26 20:56:35,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:35,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 44 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:56:36,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146978066] [2020-10-26 20:56:36,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:36,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:56:36,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105400260] [2020-10-26 20:56:36,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:36,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:36,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:36,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:36,114 INFO L87 Difference]: Start difference. First operand 4139 states and 5976 transitions. Second operand 8 states. [2020-10-26 20:56:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:48,057 INFO L93 Difference]: Finished difference Result 8578 states and 12918 transitions. [2020-10-26 20:56:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:56:48,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 862 [2020-10-26 20:56:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:48,087 INFO L225 Difference]: With dead ends: 8578 [2020-10-26 20:56:48,087 INFO L226 Difference]: Without dead ends: 5172 [2020-10-26 20:56:48,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:56:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2020-10-26 20:56:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 5107. [2020-10-26 20:56:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5107 states. [2020-10-26 20:56:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5107 states to 5107 states and 7331 transitions. [2020-10-26 20:56:48,307 INFO L78 Accepts]: Start accepts. Automaton has 5107 states and 7331 transitions. Word has length 862 [2020-10-26 20:56:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:48,307 INFO L481 AbstractCegarLoop]: Abstraction has 5107 states and 7331 transitions. [2020-10-26 20:56:48,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:56:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5107 states and 7331 transitions. [2020-10-26 20:56:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2020-10-26 20:56:48,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:48,338 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:56:48,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:56:48,339 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1877492671, now seen corresponding path program 1 times [2020-10-26 20:56:48,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:48,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721558778] [2020-10-26 20:56:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:48,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:48,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:48,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 894 [2020-10-26 20:56:53,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:53,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 20:56:53,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:53,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:53,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:56:53,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:53,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:53,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:56:53,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:53,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:53,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:53,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:56:53,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:56:53,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:56:53,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:56:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:53,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:56:53,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:53,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:56:53,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:53,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:53,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:56:53,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 20:56:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:53,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 20:56:53,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:53,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:56:53,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:53,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-26 20:56:53,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:53,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:56:54,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721558778] [2020-10-26 20:56:54,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:54,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:56:54,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666926025] [2020-10-26 20:56:54,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:54,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:54,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:54,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:54,292 INFO L87 Difference]: Start difference. First operand 5107 states and 7331 transitions. Second operand 8 states. [2020-10-26 20:57:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:06,385 INFO L93 Difference]: Finished difference Result 14229 states and 21694 transitions. [2020-10-26 20:57:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:57:06,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 872 [2020-10-26 20:57:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:06,438 INFO L225 Difference]: With dead ends: 14229 [2020-10-26 20:57:06,438 INFO L226 Difference]: Without dead ends: 9855 [2020-10-26 20:57:06,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:57:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2020-10-26 20:57:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9608. [2020-10-26 20:57:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9608 states. [2020-10-26 20:57:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9608 states to 9608 states and 13068 transitions. [2020-10-26 20:57:06,712 INFO L78 Accepts]: Start accepts. Automaton has 9608 states and 13068 transitions. Word has length 872 [2020-10-26 20:57:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:06,713 INFO L481 AbstractCegarLoop]: Abstraction has 9608 states and 13068 transitions. [2020-10-26 20:57:06,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:57:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 9608 states and 13068 transitions. [2020-10-26 20:57:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2020-10-26 20:57:06,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:06,745 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:57:06,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:57:06,746 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:06,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:06,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1537218131, now seen corresponding path program 1 times [2020-10-26 20:57:06,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:06,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319158687] [2020-10-26 20:57:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:06,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:06,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:07,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:08,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:11,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:11,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 906 [2020-10-26 20:57:11,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:11,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 20:57:11,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:11,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:57:11,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 20:57:11,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:12,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:12,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:12,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:12,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:12,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:12,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:57:12,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:12,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:12,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:12,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:12,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:12,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 20:57:12,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:57:12,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:57:12,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:12,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:12,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:12,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:57:12,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:12,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 20:57:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:12,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:12,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:12,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 20:57:12,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:57:12,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:12,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:57:12,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:12,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 20:57:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:12,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:12,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:12,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 20:57:12,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:12,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:57:12,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-26 20:57:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:12,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:57:12,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319158687] [2020-10-26 20:57:12,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:12,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:57:12,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486833928] [2020-10-26 20:57:12,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:57:12,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:57:12,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:57:12,784 INFO L87 Difference]: Start difference. First operand 9608 states and 13068 transitions. Second operand 9 states. [2020-10-26 20:57:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:26,524 INFO L93 Difference]: Finished difference Result 27514 states and 40172 transitions. [2020-10-26 20:57:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:57:26,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 884 [2020-10-26 20:57:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:26,599 INFO L225 Difference]: With dead ends: 27514 [2020-10-26 20:57:26,599 INFO L226 Difference]: Without dead ends: 18639 [2020-10-26 20:57:26,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:57:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18639 states. [2020-10-26 20:57:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18639 to 18449. [2020-10-26 20:57:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18449 states. [2020-10-26 20:57:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18449 states to 18449 states and 25671 transitions. [2020-10-26 20:57:27,105 INFO L78 Accepts]: Start accepts. Automaton has 18449 states and 25671 transitions. Word has length 884 [2020-10-26 20:57:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:27,105 INFO L481 AbstractCegarLoop]: Abstraction has 18449 states and 25671 transitions. [2020-10-26 20:57:27,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:57:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 18449 states and 25671 transitions. [2020-10-26 20:57:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1018 [2020-10-26 20:57:27,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:27,175 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-10-26 20:57:27,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:57:27,175 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash -775610124, now seen corresponding path program 1 times [2020-10-26 20:57:27,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:27,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839227748] [2020-10-26 20:57:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:27,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:27,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:28,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:32,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:32,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1041 [2020-10-26 20:57:32,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:32,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-26 20:57:32,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:32,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:57:32,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:32,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 20:57:32,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:32,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:32,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:32,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:32,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:32,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:32,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:57:32,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:32,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:32,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:32,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:32,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:57:32,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:32,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:32,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:32,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 20:57:32,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:57:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:57:32,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:57:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:32,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 20:57:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:32,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:32,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:32,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 20:57:32,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:32,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:57:32,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:32,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:32,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:32,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:57:32,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:32,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 20:57:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:32,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:32,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:32,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-26 20:57:32,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:32,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 20:57:32,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-26 20:57:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:33,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-10-26 20:57:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:33,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:33,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:33,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 20:57:33,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:33,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:57:33,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-26 20:57:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:33,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 200 proven. 50 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-26 20:57:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839227748] [2020-10-26 20:57:33,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:33,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:57:33,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027814218] [2020-10-26 20:57:33,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:57:33,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:57:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:57:33,978 INFO L87 Difference]: Start difference. First operand 18449 states and 25671 transitions. Second operand 8 states. [2020-10-26 20:57:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:44,516 INFO L93 Difference]: Finished difference Result 36371 states and 51120 transitions. [2020-10-26 20:57:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:57:44,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1017 [2020-10-26 20:57:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:44,590 INFO L225 Difference]: With dead ends: 36371 [2020-10-26 20:57:44,590 INFO L226 Difference]: Without dead ends: 18655 [2020-10-26 20:57:44,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:57:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18655 states. [2020-10-26 20:57:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18655 to 18495. [2020-10-26 20:57:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18495 states. [2020-10-26 20:57:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18495 states to 18495 states and 25726 transitions. [2020-10-26 20:57:45,115 INFO L78 Accepts]: Start accepts. Automaton has 18495 states and 25726 transitions. Word has length 1017 [2020-10-26 20:57:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:45,115 INFO L481 AbstractCegarLoop]: Abstraction has 18495 states and 25726 transitions. [2020-10-26 20:57:45,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:57:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 18495 states and 25726 transitions. [2020-10-26 20:57:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1020 [2020-10-26 20:57:45,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:45,181 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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] [2020-10-26 20:57:45,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:57:45,181 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:45,182 INFO L82 PathProgramCache]: Analyzing trace with hash 39931248, now seen corresponding path program 1 times [2020-10-26 20:57:45,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:45,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956231493] [2020-10-26 20:57:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:45,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:45,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:46,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:46,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:50,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:50,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1043 [2020-10-26 20:57:50,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:50,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 20:57:50,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:57:50,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:50,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-26 20:57:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:50,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:50,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:50,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:50,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:50,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:57:50,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:50,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:50,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:50,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:50,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:50,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:57:50,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:57:50,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:57:50,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:50,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:50,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:57:50,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:50,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:57:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:50,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:50,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:50,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:50,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:57:50,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:57:50,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:57:50,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:57:50,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:50,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 20:57:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:50,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-26 20:57:50,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:51,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-10-26 20:57:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:51,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:51,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:51,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 20:57:51,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:57:51,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-26 20:57:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 224 proven. 53 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 20:57:51,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956231493] [2020-10-26 20:57:51,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:51,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:57:51,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251712023] [2020-10-26 20:57:51,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:57:51,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:51,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:57:51,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:57:51,614 INFO L87 Difference]: Start difference. First operand 18495 states and 25726 transitions. Second operand 8 states. [2020-10-26 20:58:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:04,991 INFO L93 Difference]: Finished difference Result 53378 states and 77468 transitions. [2020-10-26 20:58:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:58:04,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1019 [2020-10-26 20:58:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:05,110 INFO L225 Difference]: With dead ends: 53378 [2020-10-26 20:58:05,111 INFO L226 Difference]: Without dead ends: 35616 [2020-10-26 20:58:05,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:58:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35616 states. [2020-10-26 20:58:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35616 to 34677. [2020-10-26 20:58:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34677 states. [2020-10-26 20:58:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34677 states to 34677 states and 45560 transitions. [2020-10-26 20:58:06,049 INFO L78 Accepts]: Start accepts. Automaton has 34677 states and 45560 transitions. Word has length 1019 [2020-10-26 20:58:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:06,050 INFO L481 AbstractCegarLoop]: Abstraction has 34677 states and 45560 transitions. [2020-10-26 20:58:06,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:58:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 34677 states and 45560 transitions. [2020-10-26 20:58:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2020-10-26 20:58:06,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:06,121 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:06,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:58:06,121 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:06,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:06,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2110455210, now seen corresponding path program 1 times [2020-10-26 20:58:06,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:06,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623493557] [2020-10-26 20:58:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:06,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:06,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:06,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:11,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:11,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1051 [2020-10-26 20:58:11,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:58:11,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-26 20:58:11,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-26 20:58:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 20:58:11,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:11,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:11,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:11,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:11,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:11,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:11,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:58:11,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:11,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:11,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:11,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:11,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:11,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:11,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:11,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:58:11,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:11,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:58:11,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:58:11,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:11,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:58:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:11,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:11,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:11,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 20:58:11,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:11,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-26 20:58:11,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:58:11,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:11,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-26 20:58:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:11,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:11,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 225 proven. 72 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-26 20:58:12,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623493557] [2020-10-26 20:58:12,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:58:12,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:58:12,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654836079] [2020-10-26 20:58:12,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:58:12,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:58:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:58:12,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:58:12,262 INFO L87 Difference]: Start difference. First operand 34677 states and 45560 transitions. Second operand 7 states. [2020-10-26 20:58:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:25,772 INFO L93 Difference]: Finished difference Result 96646 states and 132180 transitions. [2020-10-26 20:58:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:58:25,774 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1029 [2020-10-26 20:58:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:25,967 INFO L225 Difference]: With dead ends: 96646 [2020-10-26 20:58:25,968 INFO L226 Difference]: Without dead ends: 62702 [2020-10-26 20:58:26,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:58:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62702 states. [2020-10-26 20:58:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62702 to 62577. [2020-10-26 20:58:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62577 states. [2020-10-26 20:58:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62577 states to 62577 states and 82570 transitions. [2020-10-26 20:58:27,733 INFO L78 Accepts]: Start accepts. Automaton has 62577 states and 82570 transitions. Word has length 1029 [2020-10-26 20:58:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:27,733 INFO L481 AbstractCegarLoop]: Abstraction has 62577 states and 82570 transitions. [2020-10-26 20:58:27,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:58:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 62577 states and 82570 transitions. [2020-10-26 20:58:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1082 [2020-10-26 20:58:27,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:27,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:27,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:58:27,835 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash 409246974, now seen corresponding path program 1 times [2020-10-26 20:58:27,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:27,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560476902] [2020-10-26 20:58:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:28,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:30,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:33,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:33,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1103 [2020-10-26 20:58:33,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:58:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-26 20:58:33,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-26 20:58:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 20:58:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:33,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:33,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:33,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:33,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:33,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:33,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:58:33,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:33,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:33,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:33,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:33,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:33,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:58:33,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:58:33,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:33,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:58:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:33,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:33,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:33,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 20:58:33,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:33,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 20:58:33,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:33,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-26 20:58:33,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:33,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-26 20:58:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:33,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:33,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:33,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 20:58:33,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 20:58:33,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 20:58:33,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 397 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:58:34,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560476902] [2020-10-26 20:58:34,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:58:34,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:58:34,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317516745] [2020-10-26 20:58:34,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:58:34,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:58:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:58:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:58:34,417 INFO L87 Difference]: Start difference. First operand 62577 states and 82570 transitions. Second operand 7 states.