/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/Problem15_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:33:49,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:33:49,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:33:50,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:33:50,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:33:50,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:33:50,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:33:50,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:33:50,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:33:50,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:33:50,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:33:50,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:33:50,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:33:50,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:33:50,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:33:50,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:33:50,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:33:50,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:33:50,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:33:50,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:33:50,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:33:50,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:33:50,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:33:50,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:33:50,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:33:50,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:33:50,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:33:50,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:33:50,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:33:50,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:33:50,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:33:50,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:33:50,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:33:50,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:33:50,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:33:50,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:33:50,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:33:50,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:33:50,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:33:50,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:33:50,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:33:50,198 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 18:33:50,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:33:50,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:33:50,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:33:50,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:33:50,260 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:33:50,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:33:50,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:33:50,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:33:50,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:33:50,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:33:50,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:33:50,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:33:50,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:33:50,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:33:50,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:33:50,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:33:50,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:33:50,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:33:50,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:33:50,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:33:50,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:33:50,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:33:50,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:33:50,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:33:50,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:33:50,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:33:50,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:33:50,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:33:50,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:33:50,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:33:50,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:33:50,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:33:50,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:33:50,860 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:33:50,861 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:33:50,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label57.c [2020-10-27 18:33:50,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9b3eadd5/266d1a19ec904533a2daf611d1f0a4b9/FLAGe61c154c0 [2020-10-27 18:33:51,927 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:33:51,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label57.c [2020-10-27 18:33:51,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9b3eadd5/266d1a19ec904533a2daf611d1f0a4b9/FLAGe61c154c0 [2020-10-27 18:33:51,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9b3eadd5/266d1a19ec904533a2daf611d1f0a4b9 [2020-10-27 18:33:51,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:33:52,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:33:52,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:33:52,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:33:52,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:33:52,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:33:51" (1/1) ... [2020-10-27 18:33:52,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e15c7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:52, skipping insertion in model container [2020-10-27 18:33:52,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:33:51" (1/1) ... [2020-10-27 18:33:52,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:33:52,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:33:53,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:33:53,136 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:33:53,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:33:53,444 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:33:53,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53 WrapperNode [2020-10-27 18:33:53,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:33:53,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:33:53,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:33:53,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:33:53,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (1/1) ... [2020-10-27 18:33:53,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (1/1) ... [2020-10-27 18:33:53,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (1/1) ... [2020-10-27 18:33:53,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (1/1) ... [2020-10-27 18:33:53,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (1/1) ... [2020-10-27 18:33:53,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (1/1) ... [2020-10-27 18:33:53,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (1/1) ... [2020-10-27 18:33:53,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:33:53,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:33:53,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:33:53,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:33:53,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (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 18:33:53,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:33:53,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:33:53,767 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:33:53,767 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:33:53,768 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:33:53,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:33:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:33:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:33:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:33:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:33:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:33:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:33:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:33:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:33:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:33:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:33:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:33:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:33:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:33:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:33:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:33:57,744 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:33:57,744 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:33:57,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:33:57 BoogieIcfgContainer [2020-10-27 18:33:57,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:33:57,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:33:57,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:33:57,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:33:57,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:33:51" (1/3) ... [2020-10-27 18:33:57,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d05b212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:33:57, skipping insertion in model container [2020-10-27 18:33:57,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:53" (2/3) ... [2020-10-27 18:33:57,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d05b212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:33:57, skipping insertion in model container [2020-10-27 18:33:57,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:33:57" (3/3) ... [2020-10-27 18:33:57,757 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label57.c [2020-10-27 18:33:57,770 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:33:57,776 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:33:57,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:33:57,824 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:33:57,824 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:33:57,824 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:33:57,825 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:33:57,825 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:33:57,825 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:33:57,825 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:33:57,825 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:33:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:33:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 18:33:57,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:57,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:33:57,863 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1849784143, now seen corresponding path program 1 times [2020-10-27 18:33:57,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:57,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684162719] [2020-10-27 18:33:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:58,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:58,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:58,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 18:33:58,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:58,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 18:33:58,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:33:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:33:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 18:33:58,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:33:58,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:59,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:59,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:59,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:59,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:59,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 18:33:59,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:59,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:33:59,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:59,086 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 18:33:59,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684162719] [2020-10-27 18:33:59,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:33:59,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:33:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305625248] [2020-10-27 18:33:59,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:33:59,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:33:59,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:33:59,117 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:34:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:07,550 INFO L93 Difference]: Finished difference Result 1204 states and 2170 transitions. [2020-10-27 18:34:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:07,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-27 18:34:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:07,591 INFO L225 Difference]: With dead ends: 1204 [2020-10-27 18:34:07,591 INFO L226 Difference]: Without dead ends: 698 [2020-10-27 18:34:07,609 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 18:34:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-27 18:34:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 692. [2020-10-27 18:34:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-10-27 18:34:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1013 transitions. [2020-10-27 18:34:07,785 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1013 transitions. Word has length 48 [2020-10-27 18:34:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:07,786 INFO L481 AbstractCegarLoop]: Abstraction has 692 states and 1013 transitions. [2020-10-27 18:34:07,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:34:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1013 transitions. [2020-10-27 18:34:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 18:34:07,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:07,800 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:07,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:34:07,801 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:07,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:07,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1158629786, now seen corresponding path program 1 times [2020-10-27 18:34:07,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:07,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728974298] [2020-10-27 18:34:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:07,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:09,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:09,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 18:34:09,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:34:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2109 [2020-10-27 18:34:09,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:09,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:09,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:34:09,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 18:34:09,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:10,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:10,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:10,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:10,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:10,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:10,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:34:10,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:10,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:34:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:10,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:10,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:10,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:34:10,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:10,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 18:34:10,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:10,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:10,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:34:10,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:34:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:10,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728974298] [2020-10-27 18:34:10,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:10,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:10,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470059476] [2020-10-27 18:34:10,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:10,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:10,377 INFO L87 Difference]: Start difference. First operand 692 states and 1013 transitions. Second operand 5 states. [2020-10-27 18:34:10,536 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 18:34:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:19,311 INFO L93 Difference]: Finished difference Result 2010 states and 2964 transitions. [2020-10-27 18:34:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:19,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-27 18:34:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:19,335 INFO L225 Difference]: With dead ends: 2010 [2020-10-27 18:34:19,335 INFO L226 Difference]: Without dead ends: 1324 [2020-10-27 18:34:19,338 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 18:34:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2020-10-27 18:34:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1318. [2020-10-27 18:34:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2020-10-27 18:34:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1711 transitions. [2020-10-27 18:34:19,388 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1711 transitions. Word has length 117 [2020-10-27 18:34:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:19,389 INFO L481 AbstractCegarLoop]: Abstraction has 1318 states and 1711 transitions. [2020-10-27 18:34:19,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1711 transitions. [2020-10-27 18:34:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 18:34:19,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:19,393 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 18:34:19,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:34:19,393 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:19,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1207014216, now seen corresponding path program 1 times [2020-10-27 18:34:19,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:19,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064602360] [2020-10-27 18:34:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:19,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:19,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:20,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:21,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:23,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:24,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:24,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 18:34:24,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:34:24,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 18:34:24,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:24,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:24,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 186 [2020-10-27 18:34:24,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 18:34:24,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:24,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:24,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:24,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:24,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:24,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:24,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:34:24,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:24,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:24,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:24,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:24,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:24,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:34:24,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:34:24,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:24,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:34:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:24,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:24,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:24,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:34:24,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:24,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 18:34:24,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:24,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:24,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:24,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:34:24,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 18:34:24,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064602360] [2020-10-27 18:34:24,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:24,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:24,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919746793] [2020-10-27 18:34:24,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:24,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:24,895 INFO L87 Difference]: Start difference. First operand 1318 states and 1711 transitions. Second operand 5 states. [2020-10-27 18:34:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:34,671 INFO L93 Difference]: Finished difference Result 3261 states and 4366 transitions. [2020-10-27 18:34:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:34,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2020-10-27 18:34:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:34,696 INFO L225 Difference]: With dead ends: 3261 [2020-10-27 18:34:34,697 INFO L226 Difference]: Without dead ends: 1949 [2020-10-27 18:34:34,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 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 18:34:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2020-10-27 18:34:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1945. [2020-10-27 18:34:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2020-10-27 18:34:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2579 transitions. [2020-10-27 18:34:34,787 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2579 transitions. Word has length 222 [2020-10-27 18:34:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:34,789 INFO L481 AbstractCegarLoop]: Abstraction has 1945 states and 2579 transitions. [2020-10-27 18:34:34,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2579 transitions. [2020-10-27 18:34:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-27 18:34:34,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:34,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 18:34:34,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:34:34,793 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:34,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1116232208, now seen corresponding path program 1 times [2020-10-27 18:34:34,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:34,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425112219] [2020-10-27 18:34:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:34,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:35,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:35,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:37,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:37,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 18:34:37,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:34:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2938 [2020-10-27 18:34:37,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-27 18:34:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 18:34:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:37,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:38,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:38,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:38,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:38,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:38,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:34:38,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:38,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:38,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:38,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:38,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:38,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:34:38,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:38,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 18:34:38,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:38,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:34:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:38,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:38,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:38,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:34:38,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:38,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 18:34:38,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:38,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:38,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:38,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 18:34:38,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-27 18:34:38,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425112219] [2020-10-27 18:34:38,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:38,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:38,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979766083] [2020-10-27 18:34:38,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:38,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:38,489 INFO L87 Difference]: Start difference. First operand 1945 states and 2579 transitions. Second operand 5 states. [2020-10-27 18:34:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:46,910 INFO L93 Difference]: Finished difference Result 5140 states and 7009 transitions. [2020-10-27 18:34:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:46,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2020-10-27 18:34:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:46,933 INFO L225 Difference]: With dead ends: 5140 [2020-10-27 18:34:46,933 INFO L226 Difference]: Without dead ends: 3201 [2020-10-27 18:34:46,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 18:34:46,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2020-10-27 18:34:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2583. [2020-10-27 18:34:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2020-10-27 18:34:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 3324 transitions. [2020-10-27 18:34:47,044 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 3324 transitions. Word has length 226 [2020-10-27 18:34:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:47,045 INFO L481 AbstractCegarLoop]: Abstraction has 2583 states and 3324 transitions. [2020-10-27 18:34:47,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 3324 transitions. [2020-10-27 18:34:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 18:34:47,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:47,049 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:47,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:34:47,050 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash -120377322, now seen corresponding path program 1 times [2020-10-27 18:34:47,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:47,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418071816] [2020-10-27 18:34:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:47,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:47,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:48,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:50,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:51,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:52,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:52,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 18:34:52,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:34:52,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 18:34:52,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:52,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:52,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-27 18:34:52,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:34:52,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:52,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:52,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:52,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:52,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:52,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:52,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:34:52,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:52,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:52,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:52,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:52,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:34:52,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:52,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 18:34:52,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:52,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:52,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:52,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:34:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:52,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:52,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:52,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:34:52,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:52,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 18:34:52,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:52,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:34:52,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 18:34:52,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418071816] [2020-10-27 18:34:52,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:52,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:52,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634009436] [2020-10-27 18:34:52,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:52,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:52,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:52,742 INFO L87 Difference]: Start difference. First operand 2583 states and 3324 transitions. Second operand 5 states. [2020-10-27 18:35:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:02,744 INFO L93 Difference]: Finished difference Result 5206 states and 6715 transitions. [2020-10-27 18:35:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:35:02,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 229 [2020-10-27 18:35:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:02,764 INFO L225 Difference]: With dead ends: 5206 [2020-10-27 18:35:02,765 INFO L226 Difference]: Without dead ends: 2587 [2020-10-27 18:35:02,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 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 18:35:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2020-10-27 18:35:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2583. [2020-10-27 18:35:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2020-10-27 18:35:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 3317 transitions. [2020-10-27 18:35:02,860 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 3317 transitions. Word has length 229 [2020-10-27 18:35:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:02,861 INFO L481 AbstractCegarLoop]: Abstraction has 2583 states and 3317 transitions. [2020-10-27 18:35:02,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:35:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 3317 transitions. [2020-10-27 18:35:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-27 18:35:02,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:02,868 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:02,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:35:02,868 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1936800412, now seen corresponding path program 1 times [2020-10-27 18:35:02,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:02,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450778374] [2020-10-27 18:35:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:02,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:03,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:03,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:04,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:04,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:05,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:05,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 300 [2020-10-27 18:35:05,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:35:05,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2699 [2020-10-27 18:35:05,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:05,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 250 [2020-10-27 18:35:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 18:35:05,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:05,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:05,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:05,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:05,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:05,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:35:05,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:05,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:05,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:05,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:05,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:35:05,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:05,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 18:35:05,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:05,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:05,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:05,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:05,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:05,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:35:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:06,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:06,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:06,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:35:06,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:06,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-27 18:35:06,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:06,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:06,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:06,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 18:35:06,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 18:35:06,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450778374] [2020-10-27 18:35:06,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:06,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:35:06,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546005457] [2020-10-27 18:35:06,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:35:06,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:06,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:35:06,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:35:06,582 INFO L87 Difference]: Start difference. First operand 2583 states and 3317 transitions. Second operand 5 states. [2020-10-27 18:35:08,436 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-27 18:35:15,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:15,740 INFO L93 Difference]: Finished difference Result 5187 states and 6676 transitions. [2020-10-27 18:35:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:35:15,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 286 [2020-10-27 18:35:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:15,762 INFO L225 Difference]: With dead ends: 5187 [2020-10-27 18:35:15,762 INFO L226 Difference]: Without dead ends: 2587 [2020-10-27 18:35:15,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 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 18:35:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2020-10-27 18:35:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2583. [2020-10-27 18:35:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2020-10-27 18:35:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 3311 transitions. [2020-10-27 18:35:15,844 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 3311 transitions. Word has length 286 [2020-10-27 18:35:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:15,845 INFO L481 AbstractCegarLoop]: Abstraction has 2583 states and 3311 transitions. [2020-10-27 18:35:15,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:35:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 3311 transitions. [2020-10-27 18:35:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-27 18:35:15,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:15,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:15,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:35:15,852 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2128729644, now seen corresponding path program 1 times [2020-10-27 18:35:15,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:15,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776197227] [2020-10-27 18:35:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:15,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:16,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:16,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:17,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:18,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:18,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-27 18:35:18,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:35:18,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2507 [2020-10-27 18:35:18,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:18,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:18,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-10-27 18:35:18,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 18:35:18,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:18,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:18,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:18,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:18,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:18,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:18,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:35:18,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:18,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:35:18,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:18,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:18,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:18,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:35:18,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:18,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 18:35:18,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:18,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:18,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:18,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:18,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:18,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:35:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:18,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:19,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:19,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 18:35:19,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:19,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 18:35:19,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:19,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:19,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-27 18:35:19,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 18:35:19,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776197227] [2020-10-27 18:35:19,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:19,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:35:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479518559] [2020-10-27 18:35:19,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:35:19,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:35:19,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:35:19,201 INFO L87 Difference]: Start difference. First operand 2583 states and 3311 transitions. Second operand 6 states. [2020-10-27 18:35:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:33,913 INFO L93 Difference]: Finished difference Result 7662 states and 10430 transitions. [2020-10-27 18:35:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:35:33,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 293 [2020-10-27 18:35:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:33,940 INFO L225 Difference]: With dead ends: 7662 [2020-10-27 18:35:33,940 INFO L226 Difference]: Without dead ends: 5085 [2020-10-27 18:35:33,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:35:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2020-10-27 18:35:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 5078. [2020-10-27 18:35:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5078 states. [2020-10-27 18:35:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 6625 transitions. [2020-10-27 18:35:34,098 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 6625 transitions. Word has length 293 [2020-10-27 18:35:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:34,099 INFO L481 AbstractCegarLoop]: Abstraction has 5078 states and 6625 transitions. [2020-10-27 18:35:34,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:35:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 6625 transitions. [2020-10-27 18:35:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-27 18:35:34,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:34,108 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 18:35:34,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:35:34,109 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash -69220774, now seen corresponding path program 1 times [2020-10-27 18:35:34,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:34,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453442813] [2020-10-27 18:35:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:34,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:34,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:34,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:34,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:36,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:36,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-27 18:35:39,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:35:39,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 18:35:39,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:39,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 282 [2020-10-27 18:35:39,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 18:35:39,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:39,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:39,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:39,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:39,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:35:39,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:39,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:39,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:39,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:39,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:39,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:35:39,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:39,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 18:35:39,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:39,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:39,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:35:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:39,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:35:39,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:39,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 18:35:39,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:39,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:39,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:39,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:39,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-10-27 18:35:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:39,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 18:35:39,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:39,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 18:35:39,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 18:35:39,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 123 proven. 3 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-10-27 18:35:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453442813] [2020-10-27 18:35:39,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:39,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:35:39,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900142813] [2020-10-27 18:35:39,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:35:39,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:39,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:35:39,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:35:39,770 INFO L87 Difference]: Start difference. First operand 5078 states and 6625 transitions. Second operand 5 states. [2020-10-27 18:35:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:48,982 INFO L93 Difference]: Finished difference Result 10164 states and 13288 transitions. [2020-10-27 18:35:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:35:48,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 316 [2020-10-27 18:35:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:49,009 INFO L225 Difference]: With dead ends: 10164 [2020-10-27 18:35:49,009 INFO L226 Difference]: Without dead ends: 5082 [2020-10-27 18:35:49,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 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 18:35:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2020-10-27 18:35:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 5078. [2020-10-27 18:35:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5078 states. [2020-10-27 18:35:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 6621 transitions. [2020-10-27 18:35:49,162 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 6621 transitions. Word has length 316 [2020-10-27 18:35:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:49,162 INFO L481 AbstractCegarLoop]: Abstraction has 5078 states and 6621 transitions. [2020-10-27 18:35:49,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:35:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 6621 transitions. [2020-10-27 18:35:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-27 18:35:49,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:49,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:49,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:35:49,172 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -414235315, now seen corresponding path program 1 times [2020-10-27 18:35:49,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:49,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413069896] [2020-10-27 18:35:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:49,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:49,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:49,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:50,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:53,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:53,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-27 18:35:53,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:35:53,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4205 [2020-10-27 18:35:53,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-27 18:35:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 18:35:53,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:53,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:53,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:53,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:53,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:53,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:35:53,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:53,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:53,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:53,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:53,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:53,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:53,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:53,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:53,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:35:53,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:53,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 18:35:53,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:53,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:53,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:53,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 18:35:53,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:35:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:53,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:53,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:54,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:54,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 18:35:54,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:35:54,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-27 18:35:54,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-27 18:35:54,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:35:54,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413069896] [2020-10-27 18:35:54,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:54,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:35:54,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607675503] [2020-10-27 18:35:54,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:35:54,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:54,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:35:54,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:35:54,976 INFO L87 Difference]: Start difference. First operand 5078 states and 6621 transitions. Second operand 6 states. [2020-10-27 18:35:55,361 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-27 18:35:55,967 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 18:36:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:05,015 INFO L93 Difference]: Finished difference Result 10267 states and 13414 transitions. [2020-10-27 18:36:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:36:05,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 321 [2020-10-27 18:36:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:05,053 INFO L225 Difference]: With dead ends: 10267 [2020-10-27 18:36:05,053 INFO L226 Difference]: Without dead ends: 5118 [2020-10-27 18:36:05,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 18:36:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2020-10-27 18:36:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 5080. [2020-10-27 18:36:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5080 states. [2020-10-27 18:36:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 6580 transitions. [2020-10-27 18:36:05,213 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 6580 transitions. Word has length 321 [2020-10-27 18:36:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:05,214 INFO L481 AbstractCegarLoop]: Abstraction has 5080 states and 6580 transitions. [2020-10-27 18:36:05,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:36:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 6580 transitions. [2020-10-27 18:36:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-10-27 18:36:05,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:05,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:36:05,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:36:05,227 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1463364733, now seen corresponding path program 1 times [2020-10-27 18:36:05,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:05,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598942939] [2020-10-27 18:36:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:05,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:05,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:06,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:07,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:10,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:10,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-27 18:36:10,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:36:10,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 18:36:10,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:10,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:36:10,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-10-27 18:36:10,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-27 18:36:10,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:10,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:10,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:10,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:10,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:10,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:10,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:36:10,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:10,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:10,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:10,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:10,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:10,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:10,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:10,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:10,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 18:36:10,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:10,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 18:36:10,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:10,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:10,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:10,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-27 18:36:10,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:10,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-10-27 18:36:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:10,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:10,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:11,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:11,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 18:36:11,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:36:11,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-27 18:36:11,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:11,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:11,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:11,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-27 18:36:11,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 197 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 18:36:11,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598942939] [2020-10-27 18:36:11,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:11,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:11,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234686421] [2020-10-27 18:36:11,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:11,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:11,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:11,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:11,616 INFO L87 Difference]: Start difference. First operand 5080 states and 6580 transitions. Second operand 7 states. [2020-10-27 18:36:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:24,579 INFO L93 Difference]: Finished difference Result 13674 states and 18334 transitions. [2020-10-27 18:36:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:36:24,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 388 [2020-10-27 18:36:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:24,618 INFO L225 Difference]: With dead ends: 13674 [2020-10-27 18:36:24,618 INFO L226 Difference]: Without dead ends: 8600 [2020-10-27 18:36:24,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:36:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8600 states. [2020-10-27 18:36:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8600 to 6430. [2020-10-27 18:36:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6430 states. [2020-10-27 18:36:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6430 states to 6430 states and 8292 transitions. [2020-10-27 18:36:24,829 INFO L78 Accepts]: Start accepts. Automaton has 6430 states and 8292 transitions. Word has length 388 [2020-10-27 18:36:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:24,830 INFO L481 AbstractCegarLoop]: Abstraction has 6430 states and 8292 transitions. [2020-10-27 18:36:24,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:36:24,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6430 states and 8292 transitions. [2020-10-27 18:36:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-10-27 18:36:24,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:24,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:36:24,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:36:24,850 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:24,851 INFO L82 PathProgramCache]: Analyzing trace with hash -839825576, now seen corresponding path program 1 times [2020-10-27 18:36:24,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:24,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252214666] [2020-10-27 18:36:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:24,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:25,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:26,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:29,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:29,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:29,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:29,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 476 [2020-10-27 18:36:29,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:36:29,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 18:36:29,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 246 [2020-10-27 18:36:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-27 18:36:29,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:30,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:30,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:30,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:30,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:30,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:30,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:36:30,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:30,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:30,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:30,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:30,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:30,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:30,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:30,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:30,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 18:36:30,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:30,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 18:36:30,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:30,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:30,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:30,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:30,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:30,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-10-27 18:36:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:30,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:30,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:36:30,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:30,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 18:36:30,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:30,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:30,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:30,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 18:36:30,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:30,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-10-27 18:36:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:30,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:30,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:30,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 18:36:30,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:30,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 18:36:30,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:30,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:30,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:30,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-27 18:36:30,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 18:36:31,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252214666] [2020-10-27 18:36:31,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:31,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:31,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069156864] [2020-10-27 18:36:31,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:31,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:31,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:31,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:31,037 INFO L87 Difference]: Start difference. First operand 6430 states and 8292 transitions. Second operand 7 states. [2020-10-27 18:36:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:46,327 INFO L93 Difference]: Finished difference Result 21419 states and 29036 transitions. [2020-10-27 18:36:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:36:46,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 460 [2020-10-27 18:36:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:46,388 INFO L225 Difference]: With dead ends: 21419 [2020-10-27 18:36:46,388 INFO L226 Difference]: Without dead ends: 12448 [2020-10-27 18:36:46,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:36:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12448 states. [2020-10-27 18:36:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12448 to 8904. [2020-10-27 18:36:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8904 states. [2020-10-27 18:36:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8904 states to 8904 states and 10690 transitions. [2020-10-27 18:36:46,725 INFO L78 Accepts]: Start accepts. Automaton has 8904 states and 10690 transitions. Word has length 460 [2020-10-27 18:36:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:46,727 INFO L481 AbstractCegarLoop]: Abstraction has 8904 states and 10690 transitions. [2020-10-27 18:36:46,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:36:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8904 states and 10690 transitions. [2020-10-27 18:36:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-10-27 18:36:46,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:46,747 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:36:46,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:36:46,748 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash 806394816, now seen corresponding path program 1 times [2020-10-27 18:36:46,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:46,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124868879] [2020-10-27 18:36:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:46,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:47,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:47,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:51,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:51,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 477 [2020-10-27 18:36:51,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:36:51,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 18:36:51,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:51,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:36:51,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-27 18:36:51,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:36:51,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:52,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:52,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:52,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:52,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:52,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:52,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:36:52,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:52,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:52,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:52,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:52,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 18:36:52,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:52,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 18:36:52,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-27 18:36:52,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:52,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-27 18:36:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:52,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:52,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:53,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:53,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 18:36:53,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:36:53,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-27 18:36:53,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-27 18:36:53,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 255 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:36:53,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124868879] [2020-10-27 18:36:53,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:53,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:53,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801297146] [2020-10-27 18:36:53,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:53,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:53,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:53,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:53,336 INFO L87 Difference]: Start difference. First operand 8904 states and 10690 transitions. Second operand 7 states. [2020-10-27 18:36:54,720 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 18:37:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:10,381 INFO L93 Difference]: Finished difference Result 22282 states and 27878 transitions. [2020-10-27 18:37:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:37:10,384 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 463 [2020-10-27 18:37:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:10,440 INFO L225 Difference]: With dead ends: 22282 [2020-10-27 18:37:10,440 INFO L226 Difference]: Without dead ends: 12427 [2020-10-27 18:37:10,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:37:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12427 states. [2020-10-27 18:37:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12427 to 8902. [2020-10-27 18:37:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8902 states. [2020-10-27 18:37:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8902 states to 8902 states and 10579 transitions. [2020-10-27 18:37:10,756 INFO L78 Accepts]: Start accepts. Automaton has 8902 states and 10579 transitions. Word has length 463 [2020-10-27 18:37:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:10,757 INFO L481 AbstractCegarLoop]: Abstraction has 8902 states and 10579 transitions. [2020-10-27 18:37:10,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:37:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8902 states and 10579 transitions. [2020-10-27 18:37:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-10-27 18:37:10,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:10,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:37:10,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:37:10,774 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:10,775 INFO L82 PathProgramCache]: Analyzing trace with hash -168609722, now seen corresponding path program 1 times [2020-10-27 18:37:10,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:10,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002174552] [2020-10-27 18:37:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:11,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:11,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:12,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:14,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:15,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:15,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:15,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 483 [2020-10-27 18:37:15,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:37:15,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-27 18:37:15,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:15,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:15,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 433 [2020-10-27 18:37:15,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 18:37:15,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:37:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:16,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:16,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:16,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:37:16,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:16,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:37:16,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:16,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:16,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:16,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:16,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:16,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:37:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:16,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:16,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:16,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 18:37:16,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:16,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 18:37:16,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:16,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:16,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:16,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:16,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:16,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-10-27 18:37:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:16,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:16,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-27 18:37:16,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:16,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 18:37:16,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:37:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-27 18:37:16,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-27 18:37:17,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002174552] [2020-10-27 18:37:17,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:37:17,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:37:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778302761] [2020-10-27 18:37:17,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:37:17,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:37:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:37:17,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:37:17,295 INFO L87 Difference]: Start difference. First operand 8902 states and 10579 transitions. Second operand 5 states. [2020-10-27 18:37:20,955 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:37:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:24,334 INFO L93 Difference]: Finished difference Result 17513 states and 20936 transitions. [2020-10-27 18:37:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:37:24,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 469 [2020-10-27 18:37:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:24,360 INFO L225 Difference]: With dead ends: 17513 [2020-10-27 18:37:24,360 INFO L226 Difference]: Without dead ends: 8902 [2020-10-27 18:37:24,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:37:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2020-10-27 18:37:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 8900. [2020-10-27 18:37:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8900 states. [2020-10-27 18:37:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8900 states to 8900 states and 10546 transitions. [2020-10-27 18:37:24,560 INFO L78 Accepts]: Start accepts. Automaton has 8900 states and 10546 transitions. Word has length 469 [2020-10-27 18:37:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:24,561 INFO L481 AbstractCegarLoop]: Abstraction has 8900 states and 10546 transitions. [2020-10-27 18:37:24,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:37:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8900 states and 10546 transitions. [2020-10-27 18:37:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-10-27 18:37:24,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:24,577 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2020-10-27 18:37:24,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:37:24,577 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:24,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1523483513, now seen corresponding path program 1 times [2020-10-27 18:37:24,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:24,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674153623] [2020-10-27 18:37:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:24,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:24,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:25,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:25,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:25,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:27,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:28,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:29,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:29,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 519 [2020-10-27 18:37:29,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:37:29,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 18:37:29,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-10-27 18:37:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-27 18:37:29,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:29,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:37:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:29,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:29,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:37:29,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:37:29,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:29,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:37:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:29,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-27 18:37:30,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-10-27 18:37:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:30,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:30,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:30,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 18:37:30,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:30,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 18:37:30,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:37:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-27 18:37:30,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:30,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-10-27 18:37:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:30,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:30,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 18:37:30,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:30,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 18:37:30,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 18:37:30,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:30,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 253 proven. 131 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-27 18:37:30,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674153623] [2020-10-27 18:37:30,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:37:30,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:37:30,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110495759] [2020-10-27 18:37:30,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:37:30,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:37:30,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:37:30,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:37:30,796 INFO L87 Difference]: Start difference. First operand 8900 states and 10546 transitions. Second operand 7 states.