/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:48:22,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:48:22,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:48:22,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:48:22,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:48:22,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:48:22,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:48:22,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:48:22,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:48:22,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:48:22,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:48:22,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:48:22,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:48:22,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:48:22,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:48:22,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:48:22,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:48:22,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:48:22,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:48:22,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:48:22,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:48:22,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:48:22,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:48:22,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:48:22,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:48:22,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:48:22,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:48:22,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:48:22,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:48:22,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:48:22,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:48:22,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:48:22,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:48:22,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:48:22,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:48:22,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:48:22,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:48:22,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:48:22,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:48:22,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:48:22,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:48:22,527 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 [2020-10-29 08:48:22,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:48:22,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:48:22,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:48:22,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:48:22,592 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:48:22,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:48:22,593 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:48:22,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:48:22,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:48:22,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:48:22,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:48:22,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:48:22,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:48:22,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:48:22,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:48:22,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:48:22,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:48:22,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:48:22,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:48:22,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:48:22,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:48:22,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:48:22,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:48:22,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:48:22,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:48:22,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:48:22,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:48:22,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:48:22,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:48:22,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:48:23,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:48:23,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:48:23,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:48:23,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:48:23,140 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:48:23,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label21.c [2020-10-29 08:48:23,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d24e13be/97adce4801be4c5ebbacd199cd36ced6/FLAGbfd0d4a0f [2020-10-29 08:48:24,636 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:48:24,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label21.c [2020-10-29 08:48:24,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d24e13be/97adce4801be4c5ebbacd199cd36ced6/FLAGbfd0d4a0f [2020-10-29 08:48:24,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d24e13be/97adce4801be4c5ebbacd199cd36ced6 [2020-10-29 08:48:24,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:48:24,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:48:24,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:48:24,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:48:24,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:48:24,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:48:24" (1/1) ... [2020-10-29 08:48:24,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d670427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:24, skipping insertion in model container [2020-10-29 08:48:24,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:48:24" (1/1) ... [2020-10-29 08:48:24,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:48:25,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:48:27,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:48:27,903 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:48:29,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:48:29,236 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:48:29,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29 WrapperNode [2020-10-29 08:48:29,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:48:29,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:48:29,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:48:29,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:48:29,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (1/1) ... [2020-10-29 08:48:29,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (1/1) ... [2020-10-29 08:48:29,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (1/1) ... [2020-10-29 08:48:29,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (1/1) ... [2020-10-29 08:48:29,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (1/1) ... [2020-10-29 08:48:30,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (1/1) ... [2020-10-29 08:48:30,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (1/1) ... [2020-10-29 08:48:30,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:48:30,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:48:30,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:48:30,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:48:30,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (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 [2020-10-29 08:48:30,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:48:30,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:48:30,309 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:48:30,309 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:48:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:48:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:48:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:48:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:48:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:48:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:48:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:48:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:48:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:48:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:48:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:48:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:48:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:48:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:48:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:48:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:48:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:48:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:48:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:48:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:48:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:48:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:48:30,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:48:30,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:48:30,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:48:45,914 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:48:45,915 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:48:45,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:48:45 BoogieIcfgContainer [2020-10-29 08:48:45,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:48:45,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:48:45,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:48:45,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:48:45,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:48:24" (1/3) ... [2020-10-29 08:48:45,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d70b45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:48:45, skipping insertion in model container [2020-10-29 08:48:45,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:29" (2/3) ... [2020-10-29 08:48:45,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d70b45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:48:45, skipping insertion in model container [2020-10-29 08:48:45,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:48:45" (3/3) ... [2020-10-29 08:48:45,938 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label21.c [2020-10-29 08:48:45,953 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:48:45,960 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:48:45,973 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:48:46,015 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:48:46,015 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:48:46,015 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:48:46,015 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:48:46,016 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:48:46,016 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:48:46,016 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:48:46,016 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:48:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:48:46,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 08:48:46,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:48:46,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:48:46,079 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:48:46,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:48:46,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1222229779, now seen corresponding path program 1 times [2020-10-29 08:48:46,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:48:46,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383456016] [2020-10-29 08:48:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:48:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:46,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:46,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:46,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 08:48:46,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:46,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-29 08:48:46,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:46,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:46,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:48:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:48:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 08:48:46,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:48:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:48:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:47,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:47,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:47,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:48:47,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:47,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 08:48:47,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:47,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:47,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:48:47,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:48:47,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:48:47,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:48:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:48:47,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383456016] [2020-10-29 08:48:47,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:48:47,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:48:47,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768639246] [2020-10-29 08:48:47,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:48:47,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:48:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:48:47,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:48:47,177 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:49:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:49:15,221 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-29 08:49:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:49:15,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-29 08:49:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:49:15,287 INFO L225 Difference]: With dead ends: 5100 [2020-10-29 08:49:15,288 INFO L226 Difference]: Without dead ends: 3255 [2020-10-29 08:49:15,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:49:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-29 08:49:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-29 08:49:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-29 08:49:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-29 08:49:15,595 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 22 [2020-10-29 08:49:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:49:15,596 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-29 08:49:15,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:49:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-29 08:49:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 08:49:15,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:49:15,610 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:49:15,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:49:15,612 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:49:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:49:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash 761029028, now seen corresponding path program 1 times [2020-10-29 08:49:15,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:49:15,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409058342] [2020-10-29 08:49:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:49:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:15,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:16,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:17,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:17,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:17,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 08:49:17,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:49:17,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1705 [2020-10-29 08:49:17,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:17,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:49:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:49:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:49:17,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:49:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:49:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:17,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:17,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:17,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:49:17,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:17,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 08:49:17,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:17,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:17,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:49:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:49:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:49:17,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:49:17,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:49:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:17,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:17,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:17,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:49:17,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:17,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-29 08:49:17,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:17,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:49:17,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:49:17,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:49:17,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:49:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:49:17,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409058342] [2020-10-29 08:49:17,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:49:17,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:49:17,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321019254] [2020-10-29 08:49:17,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:49:17,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:49:17,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:49:17,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:49:17,960 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-29 08:50:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:50:04,714 INFO L93 Difference]: Finished difference Result 9572 states and 15537 transitions. [2020-10-29 08:50:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:50:04,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-29 08:50:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:50:04,765 INFO L225 Difference]: With dead ends: 9572 [2020-10-29 08:50:04,765 INFO L226 Difference]: Without dead ends: 6369 [2020-10-29 08:50:04,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:50:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2020-10-29 08:50:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 6276. [2020-10-29 08:50:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6276 states. [2020-10-29 08:50:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 8872 transitions. [2020-10-29 08:50:04,994 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 8872 transitions. Word has length 97 [2020-10-29 08:50:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:50:04,995 INFO L481 AbstractCegarLoop]: Abstraction has 6276 states and 8872 transitions. [2020-10-29 08:50:04,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:50:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 8872 transitions. [2020-10-29 08:50:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 08:50:04,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:50:04,998 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:50:04,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:50:04,999 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:50:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:50:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1533726441, now seen corresponding path program 1 times [2020-10-29 08:50:05,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:50:05,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103633460] [2020-10-29 08:50:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:50:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:05,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:05,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:05,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:05,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:06,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:07,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:07,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-29 08:50:07,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 08:50:07,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2106 [2020-10-29 08:50:07,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:07,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:50:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:50:07,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 08:50:07,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:50:07,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:50:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:07,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:07,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:50:07,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:50:07,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 08:50:07,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:07,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:07,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:50:07,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:50:07,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:50:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:50:07,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:50:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:07,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:07,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:07,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:07,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:50:07,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:50:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-29 08:50:07,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:07,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:50:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:50:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:50:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:50:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:50:07,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103633460] [2020-10-29 08:50:07,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:50:07,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:50:07,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8811040] [2020-10-29 08:50:07,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:50:07,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:50:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:50:07,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:50:07,699 INFO L87 Difference]: Start difference. First operand 6276 states and 8872 transitions. Second operand 7 states. [2020-10-29 08:50:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:50:58,759 INFO L93 Difference]: Finished difference Result 15580 states and 22926 transitions. [2020-10-29 08:50:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:50:58,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-29 08:50:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:50:58,822 INFO L225 Difference]: With dead ends: 15580 [2020-10-29 08:50:58,822 INFO L226 Difference]: Without dead ends: 9310 [2020-10-29 08:50:58,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:50:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2020-10-29 08:50:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 9123. [2020-10-29 08:50:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9123 states. [2020-10-29 08:50:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9123 states to 9123 states and 12857 transitions. [2020-10-29 08:50:59,125 INFO L78 Accepts]: Start accepts. Automaton has 9123 states and 12857 transitions. Word has length 108 [2020-10-29 08:50:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:50:59,126 INFO L481 AbstractCegarLoop]: Abstraction has 9123 states and 12857 transitions. [2020-10-29 08:50:59,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:50:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 9123 states and 12857 transitions. [2020-10-29 08:50:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-29 08:50:59,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:50:59,129 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:50:59,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:50:59,129 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:50:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:50:59,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1212893835, now seen corresponding path program 1 times [2020-10-29 08:50:59,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:50:59,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367317141] [2020-10-29 08:50:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:50:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:59,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:59,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:00,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:00,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-29 08:51:00,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:51:00,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-29 08:51:00,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:00,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:51:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:51:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-29 08:51:00,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:00,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:51:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:00,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:00,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:51:00,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:51:00,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:51:00,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:00,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:00,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:51:00,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:51:00,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:51:00,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:51:00,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:51:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:00,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:01,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:01,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-29 08:51:01,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:51:01,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-29 08:51:01,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:01,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:01,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:51:01,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:51:01,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-29 08:51:01,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:51:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:51:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367317141] [2020-10-29 08:51:01,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:51:01,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:51:01,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304333269] [2020-10-29 08:51:01,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:51:01,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:51:01,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:51:01,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:51:01,219 INFO L87 Difference]: Start difference. First operand 9123 states and 12857 transitions. Second operand 7 states. [2020-10-29 08:52:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:52:05,998 INFO L93 Difference]: Finished difference Result 27403 states and 38968 transitions. [2020-10-29 08:52:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:52:06,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2020-10-29 08:52:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:52:06,099 INFO L225 Difference]: With dead ends: 27403 [2020-10-29 08:52:06,100 INFO L226 Difference]: Without dead ends: 18286 [2020-10-29 08:52:06,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:52:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18286 states. [2020-10-29 08:52:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18286 to 17916. [2020-10-29 08:52:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17916 states. [2020-10-29 08:52:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17916 states to 17916 states and 22814 transitions. [2020-10-29 08:52:06,593 INFO L78 Accepts]: Start accepts. Automaton has 17916 states and 22814 transitions. Word has length 164 [2020-10-29 08:52:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:52:06,596 INFO L481 AbstractCegarLoop]: Abstraction has 17916 states and 22814 transitions. [2020-10-29 08:52:06,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:52:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 17916 states and 22814 transitions. [2020-10-29 08:52:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-29 08:52:06,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:52:06,611 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:52:06,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:52:06,612 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:52:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:52:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1773302052, now seen corresponding path program 1 times [2020-10-29 08:52:06,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:52:06,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227334301] [2020-10-29 08:52:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:52:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:06,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:07,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:08,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:08,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-29 08:52:08,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:52:08,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1469 [2020-10-29 08:52:08,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:08,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:52:08,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:52:08,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-29 08:52:08,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:52:08,319 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:52:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:52:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:08,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:08,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:08,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:52:08,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:52:08,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 08:52:08,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:08,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:52:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:52:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:52:08,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:52:08,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:52:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:08,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:08,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:08,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-29 08:52:08,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:52:08,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-29 08:52:08,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:08,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:52:08,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:52:08,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-29 08:52:08,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:52:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:52:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227334301] [2020-10-29 08:52:08,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:52:08,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:52:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387394101] [2020-10-29 08:52:08,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:52:08,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:52:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:52:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:52:08,961 INFO L87 Difference]: Start difference. First operand 17916 states and 22814 transitions. Second operand 7 states. [2020-10-29 08:52:09,142 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:52:13,880 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68