/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 07:41:41,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 07:41:41,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 07:41:41,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 07:41:41,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 07:41:41,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 07:41:41,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 07:41:41,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 07:41:41,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 07:41:41,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 07:41:41,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 07:41:41,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 07:41:41,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 07:41:41,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 07:41:41,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 07:41:41,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 07:41:41,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 07:41:41,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 07:41:41,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 07:41:41,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 07:41:41,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 07:41:41,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 07:41:41,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 07:41:41,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 07:41:41,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 07:41:41,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 07:41:41,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 07:41:41,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 07:41:41,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 07:41:41,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 07:41:41,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 07:41:41,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 07:41:41,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 07:41:41,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 07:41:41,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 07:41:41,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 07:41:41,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 07:41:41,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 07:41:41,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 07:41:41,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 07:41:41,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 07:41:41,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 07:41:41,990 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 07:41:41,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 07:41:41,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 07:41:41,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 07:41:41,993 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 07:41:41,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 07:41:41,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 07:41:41,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 07:41:41,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 07:41:41,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 07:41:41,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 07:41:41,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 07:41:41,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 07:41:41,995 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 07:41:41,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 07:41:41,996 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 07:41:41,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 07:41:41,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 07:41:41,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 07:41:41,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 07:41:41,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 07:41:41,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:41:41,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 07:41:41,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 07:41:41,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 07:41:41,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 07:41:41,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 07:41:41,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 07:41:41,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 07:41:41,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 07:41:42,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 07:41:42,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 07:41:42,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 07:41:42,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 07:41:42,453 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 07:41:42,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label11.c [2020-10-29 07:41:42,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96a43aa73/488dd4ac9d7148448b7cf85aae5d323a/FLAG82762213f [2020-10-29 07:41:43,493 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 07:41:43,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label11.c [2020-10-29 07:41:43,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96a43aa73/488dd4ac9d7148448b7cf85aae5d323a/FLAG82762213f [2020-10-29 07:41:43,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96a43aa73/488dd4ac9d7148448b7cf85aae5d323a [2020-10-29 07:41:43,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 07:41:43,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 07:41:43,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 07:41:43,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 07:41:43,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 07:41:43,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:41:43" (1/1) ... [2020-10-29 07:41:43,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d0e39aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:43, skipping insertion in model container [2020-10-29 07:41:43,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:41:43" (1/1) ... [2020-10-29 07:41:43,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 07:41:43,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 07:41:44,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:41:44,820 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 07:41:45,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:41:45,148 INFO L208 MainTranslator]: Completed translation [2020-10-29 07:41:45,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45 WrapperNode [2020-10-29 07:41:45,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 07:41:45,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 07:41:45,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 07:41:45,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 07:41:45,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (1/1) ... [2020-10-29 07:41:45,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (1/1) ... [2020-10-29 07:41:45,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (1/1) ... [2020-10-29 07:41:45,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (1/1) ... [2020-10-29 07:41:45,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (1/1) ... [2020-10-29 07:41:45,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (1/1) ... [2020-10-29 07:41:45,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (1/1) ... [2020-10-29 07:41:45,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 07:41:45,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 07:41:45,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 07:41:45,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 07:41:45,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:41:45,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 07:41:45,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 07:41:45,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 07:41:45,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 07:41:45,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 07:41:45,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 07:41:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 07:41:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 07:41:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 07:41:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 07:41:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 07:41:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 07:41:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 07:41:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 07:41:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 07:41:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 07:41:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 07:41:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 07:41:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 07:41:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 07:41:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 07:41:49,006 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 07:41:49,006 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 07:41:49,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:41:49 BoogieIcfgContainer [2020-10-29 07:41:49,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 07:41:49,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 07:41:49,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 07:41:49,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 07:41:49,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 07:41:43" (1/3) ... [2020-10-29 07:41:49,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473ed2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:41:49, skipping insertion in model container [2020-10-29 07:41:49,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:41:45" (2/3) ... [2020-10-29 07:41:49,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473ed2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:41:49, skipping insertion in model container [2020-10-29 07:41:49,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:41:49" (3/3) ... [2020-10-29 07:41:49,021 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label11.c [2020-10-29 07:41:49,036 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 07:41:49,043 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 07:41:49,058 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 07:41:49,091 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 07:41:49,091 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 07:41:49,092 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 07:41:49,092 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 07:41:49,092 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 07:41:49,092 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 07:41:49,092 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 07:41:49,092 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 07:41:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-29 07:41:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 07:41:49,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:41:49,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:41:49,138 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:41:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:41:49,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1254674729, now seen corresponding path program 1 times [2020-10-29 07:41:49,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:41:49,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217114320] [2020-10-29 07:41:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:41:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:41:49,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:41:50,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:41:50,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 07:41:50,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:41:50,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-29 07:41:50,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:41:50,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:41:50,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:41:50,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:41:50,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 07:41:50,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:41:50,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:41:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:41:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:41:50,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:41:50,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:41:50,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:41:50,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-29 07:41:50,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:41:50,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:41:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:41:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:41:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:41:50,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:41:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:41:50,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217114320] [2020-10-29 07:41:50,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:41:50,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 07:41:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031226582] [2020-10-29 07:41:50,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 07:41:50,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:41:50,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 07:41:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 07:41:50,526 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-29 07:41:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:41:57,009 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-29 07:41:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:41:57,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-29 07:41:57,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:41:57,035 INFO L225 Difference]: With dead ends: 1208 [2020-10-29 07:41:57,035 INFO L226 Difference]: Without dead ends: 703 [2020-10-29 07:41:57,050 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 [2020-10-29 07:41:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-29 07:41:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-29 07:41:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-29 07:41:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-29 07:41:57,180 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 62 [2020-10-29 07:41:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:41:57,181 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-29 07:41:57,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 07:41:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-29 07:41:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-29 07:41:57,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:41:57,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:41:57,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 07:41:57,191 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:41:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:41:57,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1917730371, now seen corresponding path program 1 times [2020-10-29 07:41:57,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:41:57,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066994262] [2020-10-29 07:41:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:41:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:41:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:41:57,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:41:59,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:41:59,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:41:59,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-29 07:41:59,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:41:59,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2097 [2020-10-29 07:41:59,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:41:59,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:41:59,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 07:41:59,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:41:59,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-29 07:41:59,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:41:59,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:41:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:41:59,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:41:59,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:41:59,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:41:59,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:41:59,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 07:41:59,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:41:59,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:41:59,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:41:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:41:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:41:59,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-29 07:41:59,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:41:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:41:59,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:41:59,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:00,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:00,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 07:42:00,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:42:00,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-29 07:42:00,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:00,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:42:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:42:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 07:42:00,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:42:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 07:42:00,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066994262] [2020-10-29 07:42:00,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:42:00,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:42:00,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429316539] [2020-10-29 07:42:00,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 07:42:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:42:00,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 07:42:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:42:00,264 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 6 states. [2020-10-29 07:42:00,410 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-29 07:42:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:42:11,443 INFO L93 Difference]: Finished difference Result 2030 states and 2975 transitions. [2020-10-29 07:42:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 07:42:11,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2020-10-29 07:42:11,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:42:11,458 INFO L225 Difference]: With dead ends: 2030 [2020-10-29 07:42:11,458 INFO L226 Difference]: Without dead ends: 1339 [2020-10-29 07:42:11,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:42:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2020-10-29 07:42:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1337. [2020-10-29 07:42:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1337 states. [2020-10-29 07:42:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1731 transitions. [2020-10-29 07:42:11,539 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1731 transitions. Word has length 141 [2020-10-29 07:42:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:42:11,540 INFO L481 AbstractCegarLoop]: Abstraction has 1337 states and 1731 transitions. [2020-10-29 07:42:11,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 07:42:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1731 transitions. [2020-10-29 07:42:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-29 07:42:11,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:42:11,552 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:42:11,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 07:42:11,553 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:42:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:42:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1963542288, now seen corresponding path program 1 times [2020-10-29 07:42:11,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:42:11,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513483707] [2020-10-29 07:42:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:42:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:11,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:13,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:13,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:16,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:16,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-29 07:42:16,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 07:42:16,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4953 [2020-10-29 07:42:16,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:16,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:16,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 07:42:16,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:42:16,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-29 07:42:16,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:42:16,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:42:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:16,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:16,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:16,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:42:16,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:16,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 07:42:16,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:16,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:42:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:42:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:42:16,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:42:16,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:42:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:17,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:17,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 07:42:17,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:17,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-29 07:42:17,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:17,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:42:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:42:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 07:42:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:42:17,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-29 07:42:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:17,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:17,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:17,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 07:42:17,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:17,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-29 07:42:17,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:17,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:17,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:42:17,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:42:17,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 07:42:17,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:42:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 109 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 07:42:17,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513483707] [2020-10-29 07:42:17,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:42:17,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:42:17,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931853314] [2020-10-29 07:42:17,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 07:42:17,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:42:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 07:42:17,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:42:17,555 INFO L87 Difference]: Start difference. First operand 1337 states and 1731 transitions. Second operand 8 states. [2020-10-29 07:42:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:42:29,727 INFO L93 Difference]: Finished difference Result 2719 states and 3752 transitions. [2020-10-29 07:42:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:42:29,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 236 [2020-10-29 07:42:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:42:29,740 INFO L225 Difference]: With dead ends: 2719 [2020-10-29 07:42:29,740 INFO L226 Difference]: Without dead ends: 2006 [2020-10-29 07:42:29,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-29 07:42:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2020-10-29 07:42:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1948. [2020-10-29 07:42:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1948 states. [2020-10-29 07:42:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2412 transitions. [2020-10-29 07:42:29,819 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2412 transitions. Word has length 236 [2020-10-29 07:42:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:42:29,820 INFO L481 AbstractCegarLoop]: Abstraction has 1948 states and 2412 transitions. [2020-10-29 07:42:29,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 07:42:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2412 transitions. [2020-10-29 07:42:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-29 07:42:29,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:42:29,827 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:42:29,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 07:42:29,828 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:42:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:42:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -304106780, now seen corresponding path program 1 times [2020-10-29 07:42:29,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:42:29,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138957054] [2020-10-29 07:42:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:42:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:30,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:30,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:34,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:34,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-29 07:42:34,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:42:34,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 07:42:34,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:34,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:34,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:42:34,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:42:34,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-29 07:42:34,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:42:35,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:42:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:35,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:35,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:35,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:42:35,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:35,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 07:42:35,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:35,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:35,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:42:35,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:42:35,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:42:35,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:42:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:42:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:35,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:35,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:35,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-29 07:42:35,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:35,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-29 07:42:35,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:35,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:35,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:42:35,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:42:35,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-29 07:42:35,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:42:36,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-29 07:42:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:36,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:36,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:36,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 07:42:36,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-29 07:42:36,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:36,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:42:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-29 07:42:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:42:36,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:42:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 108 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 07:42:37,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138957054] [2020-10-29 07:42:37,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:42:37,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:42:37,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676820803] [2020-10-29 07:42:37,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:42:37,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:42:37,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:42:37,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:42:37,071 INFO L87 Difference]: Start difference. First operand 1948 states and 2412 transitions. Second operand 7 states. [2020-10-29 07:42:37,226 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-29 07:42:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:42:50,121 INFO L93 Difference]: Finished difference Result 4257 states and 5269 transitions. [2020-10-29 07:42:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:42:50,123 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 342 [2020-10-29 07:42:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:42:50,137 INFO L225 Difference]: With dead ends: 4257 [2020-10-29 07:42:50,138 INFO L226 Difference]: Without dead ends: 2622 [2020-10-29 07:42:50,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:42:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2020-10-29 07:42:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2582. [2020-10-29 07:42:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2582 states. [2020-10-29 07:42:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3083 transitions. [2020-10-29 07:42:50,236 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3083 transitions. Word has length 342 [2020-10-29 07:42:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:42:50,237 INFO L481 AbstractCegarLoop]: Abstraction has 2582 states and 3083 transitions. [2020-10-29 07:42:50,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:42:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3083 transitions. [2020-10-29 07:42:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-10-29 07:42:50,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:42:50,250 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:42:50,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 07:42:50,251 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:42:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:42:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash -568934597, now seen corresponding path program 1 times [2020-10-29 07:42:50,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:42:50,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171693698] [2020-10-29 07:42:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:42:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:50,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:50,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:53,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:53,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-10-29 07:42:53,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:42:53,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3414 [2020-10-29 07:42:53,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:53,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:53,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:42:53,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-29 07:42:53,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 07:42:53,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 07:42:54,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:42:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:54,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:54,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:54,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:42:54,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:54,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 07:42:54,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:54,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:54,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:42:54,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:42:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:42:54,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:42:54,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:42:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:54,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:54,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:54,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-29 07:42:54,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:54,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-29 07:42:54,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:54,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:42:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:42:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-29 07:42:54,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:42:54,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-29 07:42:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:42:54,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:42:55,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:42:55,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 07:42:55,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:42:55,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-29 07:42:55,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:42:55,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:42:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:42:55,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:42:55,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 07:42:55,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:42:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:42:55,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171693698] [2020-10-29 07:42:55,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:42:55,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:42:55,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857445986] [2020-10-29 07:42:55,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:42:55,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:42:55,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:42:55,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:42:55,485 INFO L87 Difference]: Start difference. First operand 2582 states and 3083 transitions. Second operand 7 states. [2020-10-29 07:43:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:43:08,068 INFO L93 Difference]: Finished difference Result 5867 states and 7285 transitions. [2020-10-29 07:43:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:43:08,071 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 416 [2020-10-29 07:43:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:43:08,096 INFO L225 Difference]: With dead ends: 5867 [2020-10-29 07:43:08,097 INFO L226 Difference]: Without dead ends: 3598 [2020-10-29 07:43:08,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:43:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2020-10-29 07:43:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3538. [2020-10-29 07:43:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3538 states. [2020-10-29 07:43:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 4209 transitions. [2020-10-29 07:43:08,250 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 4209 transitions. Word has length 416 [2020-10-29 07:43:08,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:43:08,251 INFO L481 AbstractCegarLoop]: Abstraction has 3538 states and 4209 transitions. [2020-10-29 07:43:08,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:43:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 4209 transitions. [2020-10-29 07:43:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-29 07:43:08,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:43:08,264 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:43:08,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 07:43:08,265 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:43:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:43:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash -71904856, now seen corresponding path program 1 times [2020-10-29 07:43:08,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:43:08,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454274808] [2020-10-29 07:43:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:43:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:08,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:08,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:11,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:11,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 461 [2020-10-29 07:43:11,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:43:11,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3474 [2020-10-29 07:43:11,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:11,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:43:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-29 07:43:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-29 07:43:11,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:12,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:43:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:12,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:12,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:12,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:43:12,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:12,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 07:43:12,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:12,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:43:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:43:12,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:12,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:43:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:12,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:12,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:12,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-29 07:43:12,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:12,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-29 07:43:12,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:12,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:12,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:43:12,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:12,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-29 07:43:12,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:12,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-29 07:43:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:12,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:13,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:13,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 07:43:13,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:13,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-29 07:43:13,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:13,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:43:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:43:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 07:43:13,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 216 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:43:13,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454274808] [2020-10-29 07:43:13,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:43:13,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:43:13,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716295958] [2020-10-29 07:43:13,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:43:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:43:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:43:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:43:13,854 INFO L87 Difference]: Start difference. First operand 3538 states and 4209 transitions. Second operand 7 states. [2020-10-29 07:43:14,994 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-29 07:43:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:43:27,191 INFO L93 Difference]: Finished difference Result 8425 states and 10052 transitions. [2020-10-29 07:43:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 07:43:27,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 447 [2020-10-29 07:43:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:43:27,234 INFO L225 Difference]: With dead ends: 8425 [2020-10-29 07:43:27,235 INFO L226 Difference]: Without dead ends: 4879 [2020-10-29 07:43:27,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 07:43:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2020-10-29 07:43:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4820. [2020-10-29 07:43:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4820 states. [2020-10-29 07:43:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4820 states to 4820 states and 5579 transitions. [2020-10-29 07:43:27,422 INFO L78 Accepts]: Start accepts. Automaton has 4820 states and 5579 transitions. Word has length 447 [2020-10-29 07:43:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:43:27,423 INFO L481 AbstractCegarLoop]: Abstraction has 4820 states and 5579 transitions. [2020-10-29 07:43:27,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:43:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4820 states and 5579 transitions. [2020-10-29 07:43:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-10-29 07:43:27,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:43:27,436 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:43:27,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 07:43:27,436 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:43:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:43:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1332030752, now seen corresponding path program 1 times [2020-10-29 07:43:27,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:43:27,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663428057] [2020-10-29 07:43:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:43:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:27,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:28,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:28,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-10-29 07:43:28,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:28,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-29 07:43:28,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:28,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:28,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:43:28,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-29 07:43:28,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 07:43:28,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:28,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:43:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:28,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:28,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:28,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:43:28,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:28,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 07:43:28,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:28,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:28,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:43:28,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:28,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:43:28,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:28,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:43:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:29,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:29,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-29 07:43:29,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:29,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-29 07:43:29,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:29,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:29,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:43:29,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:29,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:43:29,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:29,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-29 07:43:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:29,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:29,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:29,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 07:43:29,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:29,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-29 07:43:29,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:29,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:43:29,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:29,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 07:43:29,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-29 07:43:29,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663428057] [2020-10-29 07:43:29,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:43:29,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:43:29,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841541081] [2020-10-29 07:43:29,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:43:29,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:43:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:43:29,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:43:29,780 INFO L87 Difference]: Start difference. First operand 4820 states and 5579 transitions. Second operand 5 states. [2020-10-29 07:43:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:43:39,205 INFO L93 Difference]: Finished difference Result 10275 states and 12234 transitions. [2020-10-29 07:43:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:43:39,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 459 [2020-10-29 07:43:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:43:39,234 INFO L225 Difference]: With dead ends: 10275 [2020-10-29 07:43:39,234 INFO L226 Difference]: Without dead ends: 5768 [2020-10-29 07:43:39,246 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 [2020-10-29 07:43:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5768 states. [2020-10-29 07:43:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5768 to 5760. [2020-10-29 07:43:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5760 states. [2020-10-29 07:43:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5760 states to 5760 states and 6647 transitions. [2020-10-29 07:43:39,402 INFO L78 Accepts]: Start accepts. Automaton has 5760 states and 6647 transitions. Word has length 459 [2020-10-29 07:43:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:43:39,403 INFO L481 AbstractCegarLoop]: Abstraction has 5760 states and 6647 transitions. [2020-10-29 07:43:39,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:43:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5760 states and 6647 transitions. [2020-10-29 07:43:39,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2020-10-29 07:43:39,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:43:39,417 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:43:39,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 07:43:39,418 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:43:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:43:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash -397154702, now seen corresponding path program 1 times [2020-10-29 07:43:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:43:39,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845966145] [2020-10-29 07:43:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:43:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:39,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:39,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:42,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:44,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:44,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 576 [2020-10-29 07:43:44,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 07:43:44,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-29 07:43:44,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:44,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:43:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-29 07:43:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-29 07:43:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:44,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:43:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:44,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:44,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:44,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:43:44,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:44,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 07:43:44,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:44,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:44,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:43:44,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:44,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:43:44,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:44,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:43:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:44,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:44,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:44,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-29 07:43:44,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:44,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-29 07:43:44,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:44,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:44,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:43:44,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:44,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:43:44,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:45,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-29 07:43:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:45,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:45,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 07:43:45,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:43:45,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-29 07:43:45,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:45,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:45,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:43:45,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:45,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 07:43:45,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:45,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-29 07:43:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:45,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:45,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:45,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:43:45,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 07:43:45,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:43:45,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-29 07:43:45,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:43:45,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:43:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:43:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:43:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 07:43:45,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:43:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 170 proven. 3 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-10-29 07:43:45,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845966145] [2020-10-29 07:43:45,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:43:45,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 07:43:45,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482738730] [2020-10-29 07:43:45,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 07:43:45,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:43:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 07:43:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:43:45,683 INFO L87 Difference]: Start difference. First operand 5760 states and 6647 transitions. Second operand 6 states. [2020-10-29 07:43:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:43:59,040 INFO L93 Difference]: Finished difference Result 11862 states and 14965 transitions. [2020-10-29 07:43:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 07:43:59,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 560 [2020-10-29 07:43:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:43:59,083 INFO L225 Difference]: With dead ends: 11862 [2020-10-29 07:43:59,084 INFO L226 Difference]: Without dead ends: 9528 [2020-10-29 07:43:59,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:43:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9528 states. [2020-10-29 07:43:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9528 to 9217. [2020-10-29 07:43:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9217 states. [2020-10-29 07:43:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9217 states to 9217 states and 11073 transitions. [2020-10-29 07:43:59,317 INFO L78 Accepts]: Start accepts. Automaton has 9217 states and 11073 transitions. Word has length 560 [2020-10-29 07:43:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:43:59,318 INFO L481 AbstractCegarLoop]: Abstraction has 9217 states and 11073 transitions. [2020-10-29 07:43:59,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 07:43:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 9217 states and 11073 transitions. [2020-10-29 07:43:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2020-10-29 07:43:59,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:43:59,338 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:43:59,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 07:43:59,339 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:43:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:43:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1094305129, now seen corresponding path program 1 times [2020-10-29 07:43:59,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:43:59,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771311403] [2020-10-29 07:43:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:43:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:43:59,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:43:59,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:00,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:01,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:03,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:04,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:04,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:04,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 603 [2020-10-29 07:44:04,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 07:44:04,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4752 [2020-10-29 07:44:04,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:04,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:44:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-29 07:44:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-29 07:44:04,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:04,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:44:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:04,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:04,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:04,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:44:04,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:04,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 07:44:04,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:04,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:44:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:44:04,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:04,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:44:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:04,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:04,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:04,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-29 07:44:04,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:04,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-29 07:44:04,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:04,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:04,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:44:04,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:04,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:44:04,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:04,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-29 07:44:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:04,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:04,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 07:44:04,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:04,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-29 07:44:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:04,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:04,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:05,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:05,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:05,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-29 07:44:05,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:44:05,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-29 07:44:05,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:05,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:05,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:44:05,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:05,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-29 07:44:05,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 170 proven. 3 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-10-29 07:44:05,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771311403] [2020-10-29 07:44:05,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:44:05,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 07:44:05,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583233065] [2020-10-29 07:44:05,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 07:44:05,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:44:05,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 07:44:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:44:05,474 INFO L87 Difference]: Start difference. First operand 9217 states and 11073 transitions. Second operand 6 states. [2020-10-29 07:44:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:44:18,808 INFO L93 Difference]: Finished difference Result 19435 states and 24901 transitions. [2020-10-29 07:44:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 07:44:18,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 587 [2020-10-29 07:44:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:44:18,859 INFO L225 Difference]: With dead ends: 19435 [2020-10-29 07:44:18,859 INFO L226 Difference]: Without dead ends: 13334 [2020-10-29 07:44:18,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:44:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2020-10-29 07:44:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 13327. [2020-10-29 07:44:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13327 states. [2020-10-29 07:44:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13327 states to 13327 states and 16370 transitions. [2020-10-29 07:44:19,216 INFO L78 Accepts]: Start accepts. Automaton has 13327 states and 16370 transitions. Word has length 587 [2020-10-29 07:44:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:44:19,218 INFO L481 AbstractCegarLoop]: Abstraction has 13327 states and 16370 transitions. [2020-10-29 07:44:19,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 07:44:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 13327 states and 16370 transitions. [2020-10-29 07:44:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2020-10-29 07:44:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:44:19,234 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-29 07:44:19,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 07:44:19,234 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:44:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:44:19,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1155429573, now seen corresponding path program 1 times [2020-10-29 07:44:19,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:44:19,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143877097] [2020-10-29 07:44:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:44:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:20,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:21,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:21,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 637 [2020-10-29 07:44:21,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:44:21,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2036 [2020-10-29 07:44:21,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:21,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:21,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:44:21,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 573 [2020-10-29 07:44:21,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 07:44:21,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:21,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:44:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:21,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:21,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:44:21,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:21,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 07:44:21,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:21,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:44:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:44:21,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:21,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:44:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:21,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:21,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:21,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-29 07:44:21,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-29 07:44:21,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:21,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:44:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:44:21,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:22,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-29 07:44:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:22,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:22,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-29 07:44:22,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-29 07:44:22,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:22,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:22,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:44:22,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:22,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:44:22,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:22,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2020-10-29 07:44:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:22,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:22,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 07:44:22,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:22,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-29 07:44:22,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:22,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:44:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 07:44:22,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 165 proven. 3 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-10-29 07:44:22,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143877097] [2020-10-29 07:44:22,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:44:22,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:44:22,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647407618] [2020-10-29 07:44:22,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:44:22,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:44:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:44:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:44:22,527 INFO L87 Difference]: Start difference. First operand 13327 states and 16370 transitions. Second operand 5 states. [2020-10-29 07:44:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:44:37,796 INFO L93 Difference]: Finished difference Result 34126 states and 43301 transitions. [2020-10-29 07:44:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:44:37,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 621 [2020-10-29 07:44:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:44:37,880 INFO L225 Difference]: With dead ends: 34126 [2020-10-29 07:44:37,880 INFO L226 Difference]: Without dead ends: 21112 [2020-10-29 07:44:37,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:44:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21112 states. [2020-10-29 07:44:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21112 to 21090. [2020-10-29 07:44:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21090 states. [2020-10-29 07:44:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21090 states to 21090 states and 25794 transitions. [2020-10-29 07:44:38,545 INFO L78 Accepts]: Start accepts. Automaton has 21090 states and 25794 transitions. Word has length 621 [2020-10-29 07:44:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:44:38,547 INFO L481 AbstractCegarLoop]: Abstraction has 21090 states and 25794 transitions. [2020-10-29 07:44:38,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:44:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 21090 states and 25794 transitions. [2020-10-29 07:44:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-10-29 07:44:38,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:44:38,565 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:44:38,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 07:44:38,565 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:44:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:44:38,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1313445052, now seen corresponding path program 1 times [2020-10-29 07:44:38,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:44:38,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461927995] [2020-10-29 07:44:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:44:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:38,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:39,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:40,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:41,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:43,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:43,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 641 [2020-10-29 07:44:43,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 07:44:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-29 07:44:43,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:43,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 07:44:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-29 07:44:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-29 07:44:43,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:44,163 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-29 07:44:44,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:44:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:44,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:44,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:44,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:44:44,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:44,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 07:44:44,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:44,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:44,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:44:44,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:44:44,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:44,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:44:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:44,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:44,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:44,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-29 07:44:44,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:44,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-29 07:44:44,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:44,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:44,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:44:44,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:44:44,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-29 07:44:44,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:44,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-29 07:44:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:44,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:44,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:44,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 07:44:44,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:44,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-29 07:44:44,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:44,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 07:44:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:44:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 07:44:44,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:44,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-29 07:44:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:44,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:45,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:45,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 07:44:45,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:44:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-29 07:44:45,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:45,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 07:44:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:44:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 07:44:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:45,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-10-29 07:44:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:44:45,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:45,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:44:45,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 07:44:45,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:44:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 486 proven. 244 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 07:44:45,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461927995] [2020-10-29 07:44:45,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:44:45,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 07:44:45,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733329649] [2020-10-29 07:44:45,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 07:44:45,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:44:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 07:44:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 07:44:45,795 INFO L87 Difference]: Start difference. First operand 21090 states and 25794 transitions. Second operand 13 states. [2020-10-29 07:44:52,421 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-29 07:44:56,045 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-29 07:45:01,579 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73