/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:29:37,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:29:37,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:29:37,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:29:37,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:29:37,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:29:37,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:29:37,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:29:37,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:29:37,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:29:37,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:29:37,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:29:37,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:29:37,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:29:37,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:29:37,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:29:37,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:29:37,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:29:37,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:29:37,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:29:37,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:29:37,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:29:38,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:29:38,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:29:38,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:29:38,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:29:38,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:29:38,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:29:38,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:29:38,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:29:38,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:29:38,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:29:38,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:29:38,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:29:38,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:29:38,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:29:38,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:29:38,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:29:38,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:29:38,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:29:38,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:29:38,017 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 [2020-10-27 19:29:38,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:29:38,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:29:38,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:29:38,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:29:38,065 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:29:38,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:29:38,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:29:38,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:29:38,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:29:38,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:29:38,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:29:38,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:29:38,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:29:38,067 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:29:38,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:29:38,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:29:38,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:29:38,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:29:38,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:29:38,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:29:38,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:29:38,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:29:38,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:29:38,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:29:38,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:29:38,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:29:38,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:29:38,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:29:38,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:29:38,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:29:38,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:29:38,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:29:38,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:29:38,533 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:29:38,533 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:29:38,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label41.c [2020-10-27 19:29:38,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ca63a95d/4910ab3371624929a68bdfe2fe07ac74/FLAGb33937e64 [2020-10-27 19:29:39,817 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:29:39,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label41.c [2020-10-27 19:29:39,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ca63a95d/4910ab3371624929a68bdfe2fe07ac74/FLAGb33937e64 [2020-10-27 19:29:40,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ca63a95d/4910ab3371624929a68bdfe2fe07ac74 [2020-10-27 19:29:40,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:29:40,071 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:29:40,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:29:40,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:29:40,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:29:40,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:29:40" (1/1) ... [2020-10-27 19:29:40,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f0f118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:40, skipping insertion in model container [2020-10-27 19:29:40,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:29:40" (1/1) ... [2020-10-27 19:29:40,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:29:40,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:29:42,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:29:42,409 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:29:43,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:29:43,748 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:29:43,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43 WrapperNode [2020-10-27 19:29:43,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:29:43,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:29:43,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:29:43,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:29:43,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (1/1) ... [2020-10-27 19:29:43,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (1/1) ... [2020-10-27 19:29:43,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (1/1) ... [2020-10-27 19:29:43,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (1/1) ... [2020-10-27 19:29:44,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (1/1) ... [2020-10-27 19:29:44,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (1/1) ... [2020-10-27 19:29:44,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (1/1) ... [2020-10-27 19:29:44,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:29:44,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:29:44,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:29:44,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:29:44,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:29:44,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:29:44,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:29:44,512 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:29:44,512 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:29:44,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:29:44,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:29:44,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:29:44,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:29:44,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:29:44,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:29:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:29:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:29:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:29:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:29:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:29:44,516 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:29:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:29:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:29:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:29:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:29:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:29:44,518 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:29:44,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:29:44,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:29:44,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:29:44,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:29:44,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:29:44,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:29:44,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:30:00,117 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:30:00,117 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:30:00,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:30:00 BoogieIcfgContainer [2020-10-27 19:30:00,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:30:00,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:30:00,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:30:00,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:30:00,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:29:40" (1/3) ... [2020-10-27 19:30:00,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2582fa8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:30:00, skipping insertion in model container [2020-10-27 19:30:00,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:29:43" (2/3) ... [2020-10-27 19:30:00,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2582fa8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:30:00, skipping insertion in model container [2020-10-27 19:30:00,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:30:00" (3/3) ... [2020-10-27 19:30:00,141 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label41.c [2020-10-27 19:30:00,153 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:30:00,159 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:30:00,172 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:30:00,212 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:30:00,212 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:30:00,212 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:30:00,212 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:30:00,212 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:30:00,213 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:30:00,213 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:30:00,213 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:30:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:30:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:30:00,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:30:00,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:30:00,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:30:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:30:00,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1524423826, now seen corresponding path program 1 times [2020-10-27 19:30:00,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:30:00,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466635376] [2020-10-27 19:30:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:30:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:30:00,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:01,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:30:01,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:30:01,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:30:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-27 19:30:01,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:30:01,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:30:01,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:30:01,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:30:01,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:30:01,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:30:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:30:01,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:01,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:30:01,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:30:01,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:30:01,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 19:30:01,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:30:01,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:30:01,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:30:01,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:30:01,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:30:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:30:01,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466635376] [2020-10-27 19:30:01,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:30:01,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:30:01,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194786926] [2020-10-27 19:30:01,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:30:01,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:30:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:30:01,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:30:01,248 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:30:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:30:31,684 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 19:30:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:30:31,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 19:30:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:30:31,733 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 19:30:31,733 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 19:30:31,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:30:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 19:30:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 19:30:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 19:30:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 19:30:31,986 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 13 [2020-10-27 19:30:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:30:31,987 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 19:30:31,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:30:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 19:30:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 19:30:31,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:30:31,994 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:30:31,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:30:31,995 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:30:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:30:31,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1349691703, now seen corresponding path program 1 times [2020-10-27 19:30:31,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:30:31,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310223694] [2020-10-27 19:30:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:30:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:30:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:32,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:33,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:30:33,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 19:30:33,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:30:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1485 [2020-10-27 19:30:33,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:30:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:30:33,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:30:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:30:33,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:30:33,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:30:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:30:33,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:33,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:30:33,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:30:33,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:30:33,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 19:30:33,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:30:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:30:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:30:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:30:33,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:30:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:30:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:30:33,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:33,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:30:33,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:30:33,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:30:33,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 19:30:33,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:30:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:30:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:30:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:30:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:30:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:30:33,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310223694] [2020-10-27 19:30:33,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:30:33,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:30:33,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885228874] [2020-10-27 19:30:33,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:30:33,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:30:33,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:30:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:30:33,943 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 5 states. [2020-10-27 19:31:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:31:10,938 INFO L93 Difference]: Finished difference Result 7907 states and 13888 transitions. [2020-10-27 19:31:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:31:10,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-27 19:31:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:31:10,971 INFO L225 Difference]: With dead ends: 7907 [2020-10-27 19:31:10,971 INFO L226 Difference]: Without dead ends: 4713 [2020-10-27 19:31:10,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:31:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2020-10-27 19:31:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4653. [2020-10-27 19:31:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4653 states. [2020-10-27 19:31:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 7683 transitions. [2020-10-27 19:31:11,126 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 7683 transitions. Word has length 85 [2020-10-27 19:31:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:31:11,127 INFO L481 AbstractCegarLoop]: Abstraction has 4653 states and 7683 transitions. [2020-10-27 19:31:11,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:31:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 7683 transitions. [2020-10-27 19:31:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 19:31:11,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:31:11,132 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:31:11,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:31:11,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:31:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:31:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1411594156, now seen corresponding path program 1 times [2020-10-27 19:31:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:31:11,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364683567] [2020-10-27 19:31:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:31:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:11,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:11,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:12,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 19:31:12,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:31:12,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 897 [2020-10-27 19:31:12,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:12,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:31:12,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 19:31:12,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:31:12,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:12,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:31:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:12,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:12,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:31:12,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:12,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:31:12,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:31:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:31:12,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:12,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:31:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:12,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:12,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:12,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 19:31:12,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:12,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 19:31:12,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:12,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:31:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 19:31:12,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:31:12,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364683567] [2020-10-27 19:31:12,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:31:12,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:31:12,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337185280] [2020-10-27 19:31:12,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:31:12,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:31:12,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:31:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:31:12,494 INFO L87 Difference]: Start difference. First operand 4653 states and 7683 transitions. Second operand 5 states. [2020-10-27 19:31:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:31:51,763 INFO L93 Difference]: Finished difference Result 13546 states and 22693 transitions. [2020-10-27 19:31:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:31:51,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-27 19:31:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:31:51,814 INFO L225 Difference]: With dead ends: 13546 [2020-10-27 19:31:51,815 INFO L226 Difference]: Without dead ends: 8899 [2020-10-27 19:31:51,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:31:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2020-10-27 19:31:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 8894. [2020-10-27 19:31:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8894 states. [2020-10-27 19:31:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8894 states to 8894 states and 13318 transitions. [2020-10-27 19:31:52,120 INFO L78 Accepts]: Start accepts. Automaton has 8894 states and 13318 transitions. Word has length 112 [2020-10-27 19:31:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:31:52,121 INFO L481 AbstractCegarLoop]: Abstraction has 8894 states and 13318 transitions. [2020-10-27 19:31:52,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:31:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8894 states and 13318 transitions. [2020-10-27 19:31:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 19:31:52,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:31:52,136 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:31:52,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:31:52,138 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:31:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:31:52,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1884174664, now seen corresponding path program 1 times [2020-10-27 19:31:52,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:31:52,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562307985] [2020-10-27 19:31:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:31:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:52,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:52,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:53,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:53,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 19:31:53,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:31:53,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-27 19:31:53,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:53,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:31:53,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 19:31:53,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:31:53,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:53,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:31:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:53,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:53,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:31:53,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:53,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:31:53,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:53,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:31:53,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:53,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:31:53,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:53,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:31:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:53,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:53,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:53,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 19:31:53,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:53,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 19:31:53,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:53,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:31:53,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:53,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 19:31:53,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:31:53,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562307985] [2020-10-27 19:31:53,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:31:53,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:31:53,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826017580] [2020-10-27 19:31:53,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:31:53,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:31:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:31:53,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:31:53,841 INFO L87 Difference]: Start difference. First operand 8894 states and 13318 transitions. Second operand 5 states. [2020-10-27 19:32:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:32:37,855 INFO L93 Difference]: Finished difference Result 22013 states and 34109 transitions. [2020-10-27 19:32:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:32:37,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-27 19:32:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:32:37,924 INFO L225 Difference]: With dead ends: 22013 [2020-10-27 19:32:37,925 INFO L226 Difference]: Without dead ends: 13125 [2020-10-27 19:32:37,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:32:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13125 states. [2020-10-27 19:32:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13125 to 13118. [2020-10-27 19:32:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13118 states. [2020-10-27 19:32:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13118 states to 13118 states and 18368 transitions. [2020-10-27 19:32:38,304 INFO L78 Accepts]: Start accepts. Automaton has 13118 states and 18368 transitions. Word has length 114 [2020-10-27 19:32:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:32:38,306 INFO L481 AbstractCegarLoop]: Abstraction has 13118 states and 18368 transitions. [2020-10-27 19:32:38,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:32:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 13118 states and 18368 transitions. [2020-10-27 19:32:38,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 19:32:38,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:32:38,313 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:32:38,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:32:38,313 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:32:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:32:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash 146893655, now seen corresponding path program 1 times [2020-10-27 19:32:38,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:32:38,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677709171] [2020-10-27 19:32:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:32:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:38,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:38,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:38,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 19:32:38,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:38,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 19:32:38,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:32:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:32:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 19:32:38,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:38,890 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:32:38,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:32:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:38,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:38,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:32:38,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:38,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:32:38,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:38,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:32:38,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:38,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:32:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:38,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:32:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:39,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:39,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:39,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 19:32:39,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:39,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 19:32:39,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:39,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:32:39,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:32:39,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 19:32:39,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:32:39,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677709171] [2020-10-27 19:32:39,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:32:39,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:32:39,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910132650] [2020-10-27 19:32:39,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:32:39,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:32:39,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:32:39,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:32:39,355 INFO L87 Difference]: Start difference. First operand 13118 states and 18368 transitions. Second operand 7 states. [2020-10-27 19:32:39,502 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 19:33:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:33:39,328 INFO L93 Difference]: Finished difference Result 39641 states and 58244 transitions. [2020-10-27 19:33:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:33:39,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-27 19:33:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:33:39,425 INFO L225 Difference]: With dead ends: 39641 [2020-10-27 19:33:39,426 INFO L226 Difference]: Without dead ends: 26529 [2020-10-27 19:33:39,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:33:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26529 states. [2020-10-27 19:33:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26529 to 26303. [2020-10-27 19:33:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26303 states. [2020-10-27 19:33:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26303 states to 26303 states and 34515 transitions. [2020-10-27 19:33:40,168 INFO L78 Accepts]: Start accepts. Automaton has 26303 states and 34515 transitions. Word has length 133 [2020-10-27 19:33:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:33:40,169 INFO L481 AbstractCegarLoop]: Abstraction has 26303 states and 34515 transitions. [2020-10-27 19:33:40,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:33:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 26303 states and 34515 transitions. [2020-10-27 19:33:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-27 19:33:40,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:33:40,176 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:33:40,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:33:40,176 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:33:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:33:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1413877268, now seen corresponding path program 1 times [2020-10-27 19:33:40,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:33:40,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229849845] [2020-10-27 19:33:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:33:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:40,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:42,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:42,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-27 19:33:42,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:33:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2470 [2020-10-27 19:33:42,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:33:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:33:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 19:33:42,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:42,872 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:33:42,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:33:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:42,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:42,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:42,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:33:42,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:33:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:33:42,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:33:42,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:33:42,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:33:42,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:42,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:33:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:42,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:42,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:43,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:43,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 19:33:43,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:33:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 19:33:43,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:33:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-27 19:33:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:33:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:43,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-27 19:33:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:43,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:43,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:43,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 19:33:43,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:33:43,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 19:33:43,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:33:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:33:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 19:33:43,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:33:43,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229849845] [2020-10-27 19:33:43,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:33:43,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:33:43,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158688412] [2020-10-27 19:33:43,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:33:43,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:33:43,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:33:43,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:33:43,662 INFO L87 Difference]: Start difference. First operand 26303 states and 34515 transitions. Second operand 8 states. [2020-10-27 19:33:43,844 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 19:33:44,558 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71