/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product54.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:06:07,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:06:07,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:06:07,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:06:07,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:06:07,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:06:07,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:06:07,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:06:07,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:06:07,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:06:07,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:06:07,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:06:07,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:06:07,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:06:07,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:06:07,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:06:07,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:06:07,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:06:07,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:06:07,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:06:07,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:06:07,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:06:07,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:06:07,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:06:07,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:06:07,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:06:07,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:06:07,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:06:07,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:06:07,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:06:07,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:06:07,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:06:07,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:06:07,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:06:07,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:06:07,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:06:07,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:06:07,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:06:07,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:06:07,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:06:07,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:06:07,408 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 [2020-09-21 10:06:07,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:06:07,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:06:07,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:06:07,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:06:07,456 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:06:07,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:06:07,457 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:06:07,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:06:07,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:06:07,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:06:07,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:06:07,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:06:07,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:06:07,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:06:07,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:06:07,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:06:07,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:06:07,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:06:07,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:06:07,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:06:07,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:06:07,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:06:07,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:06:07,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:06:07,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:06:07,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:06:07,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:06:07,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:06:07,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:06:07,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:06:07,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:06:07,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:06:07,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:06:07,925 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:06:07,926 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:06:07,927 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product54.cil.c [2020-09-21 10:06:08,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fe79f88b/2e07dd42ee1c4101baf45b7668b3e49f/FLAGe61e707cd [2020-09-21 10:06:08,636 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:06:08,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product54.cil.c [2020-09-21 10:06:08,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fe79f88b/2e07dd42ee1c4101baf45b7668b3e49f/FLAGe61e707cd [2020-09-21 10:06:08,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fe79f88b/2e07dd42ee1c4101baf45b7668b3e49f [2020-09-21 10:06:08,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:06:08,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:06:08,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:06:08,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:06:08,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:06:08,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:06:08" (1/1) ... [2020-09-21 10:06:08,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:08, skipping insertion in model container [2020-09-21 10:06:08,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:06:08" (1/1) ... [2020-09-21 10:06:08,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:06:08,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:06:09,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:06:09,310 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:06:09,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:06:09,587 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:06:09,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09 WrapperNode [2020-09-21 10:06:09,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:06:09,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:06:09,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:06:09,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:06:09,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (1/1) ... [2020-09-21 10:06:09,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (1/1) ... [2020-09-21 10:06:09,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (1/1) ... [2020-09-21 10:06:09,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (1/1) ... [2020-09-21 10:06:09,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (1/1) ... [2020-09-21 10:06:09,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (1/1) ... [2020-09-21 10:06:09,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (1/1) ... [2020-09-21 10:06:09,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:06:09,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:06:09,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:06:09,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:06:09,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (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 [2020-09-21 10:06:09,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:06:09,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:06:09,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-21 10:06:09,785 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-21 10:06:09,786 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-21 10:06:09,786 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-21 10:06:09,786 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-21 10:06:09,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:06:09,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-09-21 10:06:09,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-09-21 10:06:09,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-21 10:06:09,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-21 10:06:09,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-21 10:06:09,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-21 10:06:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-21 10:06:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-21 10:06:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-21 10:06:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-21 10:06:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-21 10:06:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:06:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-09-21 10:06:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-21 10:06:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-21 10:06:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-21 10:06:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-21 10:06:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-21 10:06:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-21 10:06:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-21 10:06:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-09-21 10:06:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-09-21 10:06:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-21 10:06:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-21 10:06:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-21 10:06:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-21 10:06:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-21 10:06:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-21 10:06:09,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-21 10:06:09,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-09-21 10:06:09,792 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-21 10:06:09,792 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-21 10:06:09,792 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-21 10:06:09,792 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-21 10:06:09,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-21 10:06:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:06:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:06:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:06:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-21 10:06:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-21 10:06:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-21 10:06:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-21 10:06:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-21 10:06:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-21 10:06:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-21 10:06:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-09-21 10:06:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-21 10:06:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-21 10:06:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-21 10:06:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-21 10:06:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-21 10:06:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:06:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-21 10:06:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-21 10:06:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-21 10:06:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-09-21 10:06:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-21 10:06:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:06:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:06:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-21 10:06:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:06:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:06:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:06:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:06:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-21 10:06:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:06:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-21 10:06:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-21 10:06:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:06:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-21 10:06:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-21 10:06:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:06:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-21 10:06:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-09-21 10:06:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-21 10:06:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-21 10:06:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-21 10:06:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-09-21 10:06:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-21 10:06:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-21 10:06:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-21 10:06:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-21 10:06:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-21 10:06:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:06:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-09-21 10:06:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-09-21 10:06:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-21 10:06:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-21 10:06:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-21 10:06:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:06:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:06:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:06:10,959 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:06:10,960 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 10:06:10,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:06:10 BoogieIcfgContainer [2020-09-21 10:06:10,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:06:10,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:06:10,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:06:10,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:06:10,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:06:08" (1/3) ... [2020-09-21 10:06:10,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33becb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:06:10, skipping insertion in model container [2020-09-21 10:06:10,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:09" (2/3) ... [2020-09-21 10:06:10,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33becb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:06:10, skipping insertion in model container [2020-09-21 10:06:10,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:06:10" (3/3) ... [2020-09-21 10:06:10,976 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product54.cil.c [2020-09-21 10:06:10,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:06:11,000 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:06:11,023 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:06:11,056 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:06:11,056 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:06:11,056 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:06:11,056 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:06:11,056 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:06:11,057 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:06:11,057 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:06:11,057 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:06:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states. [2020-09-21 10:06:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:06:11,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:11,100 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] [2020-09-21 10:06:11,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1445624956, now seen corresponding path program 1 times [2020-09-21 10:06:11,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:11,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002467685] [2020-09-21 10:06:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,822 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:11,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 10:06:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:06:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:11,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002467685] [2020-09-21 10:06:11,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:11,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:06:11,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527371174] [2020-09-21 10:06:11,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:06:11,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:11,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:06:11,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:06:11,976 INFO L87 Difference]: Start difference. First operand 195 states. Second operand 4 states. [2020-09-21 10:06:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:13,305 INFO L93 Difference]: Finished difference Result 338 states and 440 transitions. [2020-09-21 10:06:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:06:13,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-09-21 10:06:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:13,326 INFO L225 Difference]: With dead ends: 338 [2020-09-21 10:06:13,326 INFO L226 Difference]: Without dead ends: 187 [2020-09-21 10:06:13,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:06:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-21 10:06:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2020-09-21 10:06:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-21 10:06:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-09-21 10:06:13,473 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 51 [2020-09-21 10:06:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:13,474 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-09-21 10:06:13,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:06:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-09-21 10:06:13,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 10:06:13,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:13,485 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] [2020-09-21 10:06:13,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:06:13,486 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash 313505704, now seen corresponding path program 1 times [2020-09-21 10:06:13,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:13,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103776186] [2020-09-21 10:06:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:13,957 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:13,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:13,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:14,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:14,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:14,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:14,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:14,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:06:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:14,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:06:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:14,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103776186] [2020-09-21 10:06:14,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:14,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:06:14,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339684534] [2020-09-21 10:06:14,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:06:14,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:14,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:06:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:06:14,050 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 5 states. [2020-09-21 10:06:14,572 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:15,867 INFO L93 Difference]: Finished difference Result 279 states and 347 transitions. [2020-09-21 10:06:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:06:15,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-09-21 10:06:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:15,876 INFO L225 Difference]: With dead ends: 279 [2020-09-21 10:06:15,877 INFO L226 Difference]: Without dead ends: 177 [2020-09-21 10:06:15,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:06:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-21 10:06:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2020-09-21 10:06:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-21 10:06:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-09-21 10:06:15,929 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 52 [2020-09-21 10:06:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:15,929 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-09-21 10:06:15,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:06:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-09-21 10:06:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:06:15,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:15,932 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] [2020-09-21 10:06:15,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:06:15,932 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:15,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1935207340, now seen corresponding path program 1 times [2020-09-21 10:06:15,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:15,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977118105] [2020-09-21 10:06:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,383 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:16,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:06:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:06:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:16,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977118105] [2020-09-21 10:06:16,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:16,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:06:16,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786552279] [2020-09-21 10:06:16,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:06:16,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:16,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:06:16,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:06:16,508 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 9 states. [2020-09-21 10:06:16,996 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:17,384 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:17,692 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:18,007 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:19,661 INFO L93 Difference]: Finished difference Result 292 states and 366 transitions. [2020-09-21 10:06:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:06:19,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-09-21 10:06:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:19,664 INFO L225 Difference]: With dead ends: 292 [2020-09-21 10:06:19,665 INFO L226 Difference]: Without dead ends: 177 [2020-09-21 10:06:19,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:06:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-21 10:06:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2020-09-21 10:06:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-21 10:06:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2020-09-21 10:06:19,707 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 57 [2020-09-21 10:06:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:19,707 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2020-09-21 10:06:19,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:06:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2020-09-21 10:06:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 10:06:19,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:19,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:19,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:06:19,709 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:19,710 INFO L82 PathProgramCache]: Analyzing trace with hash 979214064, now seen corresponding path program 1 times [2020-09-21 10:06:19,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:19,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060543615] [2020-09-21 10:06:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,049 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:20,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:06:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-21 10:06:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-21 10:06:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:20,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060543615] [2020-09-21 10:06:20,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:20,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:06:20,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110065039] [2020-09-21 10:06:20,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:06:20,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:06:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:06:20,203 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand 7 states. [2020-09-21 10:06:20,572 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:22,010 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:22,999 INFO L93 Difference]: Finished difference Result 397 states and 501 transitions. [2020-09-21 10:06:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:06:23,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-09-21 10:06:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:23,005 INFO L225 Difference]: With dead ends: 397 [2020-09-21 10:06:23,005 INFO L226 Difference]: Without dead ends: 282 [2020-09-21 10:06:23,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:06:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-21 10:06:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 233. [2020-09-21 10:06:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-09-21 10:06:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 266 transitions. [2020-09-21 10:06:23,061 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 266 transitions. Word has length 75 [2020-09-21 10:06:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:23,062 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 266 transitions. [2020-09-21 10:06:23,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:06:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 266 transitions. [2020-09-21 10:06:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-21 10:06:23,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:23,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:23,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:06:23,064 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:23,065 INFO L82 PathProgramCache]: Analyzing trace with hash -919866488, now seen corresponding path program 1 times [2020-09-21 10:06:23,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:23,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398322693] [2020-09-21 10:06:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,438 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:23,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:06:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-21 10:06:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-21 10:06:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:23,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398322693] [2020-09-21 10:06:23,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:23,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:06:23,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431430506] [2020-09-21 10:06:23,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:06:23,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:23,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:06:23,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:06:23,631 INFO L87 Difference]: Start difference. First operand 233 states and 266 transitions. Second operand 9 states. [2020-09-21 10:06:24,089 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:25,651 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:25,998 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:26,289 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:26,570 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:28,272 INFO L93 Difference]: Finished difference Result 695 states and 864 transitions. [2020-09-21 10:06:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:06:28,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-09-21 10:06:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:28,277 INFO L225 Difference]: With dead ends: 695 [2020-09-21 10:06:28,277 INFO L226 Difference]: Without dead ends: 490 [2020-09-21 10:06:28,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:06:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-09-21 10:06:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 414. [2020-09-21 10:06:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-09-21 10:06:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 472 transitions. [2020-09-21 10:06:28,381 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 472 transitions. Word has length 89 [2020-09-21 10:06:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:28,381 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 472 transitions. [2020-09-21 10:06:28,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:06:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 472 transitions. [2020-09-21 10:06:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:06:28,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:28,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:28,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:06:28,384 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:28,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1008826772, now seen corresponding path program 1 times [2020-09-21 10:06:28,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:28,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819338000] [2020-09-21 10:06:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,784 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:28,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:06:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:06:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:06:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-21 10:06:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:29,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819338000] [2020-09-21 10:06:29,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:29,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-21 10:06:29,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628840135] [2020-09-21 10:06:29,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:06:29,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:29,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:06:29,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:06:29,004 INFO L87 Difference]: Start difference. First operand 414 states and 472 transitions. Second operand 10 states. [2020-09-21 10:06:29,527 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:30,913 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:31,205 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:31,529 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:31,869 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:33,477 INFO L93 Difference]: Finished difference Result 914 states and 1119 transitions. [2020-09-21 10:06:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:06:33,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-09-21 10:06:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:33,483 INFO L225 Difference]: With dead ends: 914 [2020-09-21 10:06:33,483 INFO L226 Difference]: Without dead ends: 528 [2020-09-21 10:06:33,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:06:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-09-21 10:06:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 413. [2020-09-21 10:06:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-09-21 10:06:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 469 transitions. [2020-09-21 10:06:33,587 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 469 transitions. Word has length 93 [2020-09-21 10:06:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:33,588 INFO L479 AbstractCegarLoop]: Abstraction has 413 states and 469 transitions. [2020-09-21 10:06:33,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:06:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 469 transitions. [2020-09-21 10:06:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-21 10:06:33,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:33,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:33,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:06:33,590 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:33,591 INFO L82 PathProgramCache]: Analyzing trace with hash 390870795, now seen corresponding path program 1 times [2020-09-21 10:06:33,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:33,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518441514] [2020-09-21 10:06:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,903 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:33,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:06:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:06:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:34,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:34,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:34,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:34,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:06:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:34,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:06:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:34,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518441514] [2020-09-21 10:06:34,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:34,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-21 10:06:34,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921660239] [2020-09-21 10:06:34,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:06:34,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:34,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:06:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:06:34,080 INFO L87 Difference]: Start difference. First operand 413 states and 469 transitions. Second operand 10 states. [2020-09-21 10:06:35,603 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:36,014 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:06:36,256 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:36,557 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:38,026 INFO L93 Difference]: Finished difference Result 917 states and 1130 transitions. [2020-09-21 10:06:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:06:38,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 94 [2020-09-21 10:06:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:38,033 INFO L225 Difference]: With dead ends: 917 [2020-09-21 10:06:38,033 INFO L226 Difference]: Without dead ends: 532 [2020-09-21 10:06:38,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:06:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-09-21 10:06:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 423. [2020-09-21 10:06:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-09-21 10:06:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 479 transitions. [2020-09-21 10:06:38,155 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 479 transitions. Word has length 94 [2020-09-21 10:06:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:38,155 INFO L479 AbstractCegarLoop]: Abstraction has 423 states and 479 transitions. [2020-09-21 10:06:38,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:06:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 479 transitions. [2020-09-21 10:06:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-21 10:06:38,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:38,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:38,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:06:38,158 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:38,158 INFO L82 PathProgramCache]: Analyzing trace with hash 318484237, now seen corresponding path program 1 times [2020-09-21 10:06:38,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:38,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781853360] [2020-09-21 10:06:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,496 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:38,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:06:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:06:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:06:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:06:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:38,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781853360] [2020-09-21 10:06:38,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:38,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-21 10:06:38,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339328950] [2020-09-21 10:06:38,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:06:38,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:38,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:06:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:06:38,689 INFO L87 Difference]: Start difference. First operand 423 states and 479 transitions. Second operand 12 states. [2020-09-21 10:06:40,083 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:40,343 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:40,650 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:41,489 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:41,801 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:42,117 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:43,854 INFO L93 Difference]: Finished difference Result 941 states and 1174 transitions. [2020-09-21 10:06:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:06:43,855 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2020-09-21 10:06:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:43,859 INFO L225 Difference]: With dead ends: 941 [2020-09-21 10:06:43,859 INFO L226 Difference]: Without dead ends: 546 [2020-09-21 10:06:43,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:06:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-09-21 10:06:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 431. [2020-09-21 10:06:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-09-21 10:06:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 487 transitions. [2020-09-21 10:06:43,945 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 487 transitions. Word has length 94 [2020-09-21 10:06:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:43,947 INFO L479 AbstractCegarLoop]: Abstraction has 431 states and 487 transitions. [2020-09-21 10:06:43,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:06:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 487 transitions. [2020-09-21 10:06:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-21 10:06:43,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:43,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:43,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:06:43,952 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 648249998, now seen corresponding path program 1 times [2020-09-21 10:06:43,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:43,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699143331] [2020-09-21 10:06:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,326 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:44,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:06:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:06:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:06:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:06:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:44,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699143331] [2020-09-21 10:06:44,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:44,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:06:44,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378657832] [2020-09-21 10:06:44,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:06:44,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:06:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:06:44,594 INFO L87 Difference]: Start difference. First operand 431 states and 487 transitions. Second operand 8 states. [2020-09-21 10:06:45,156 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:45,791 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:48,857 INFO L93 Difference]: Finished difference Result 1309 states and 1687 transitions. [2020-09-21 10:06:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:06:48,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-09-21 10:06:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:48,865 INFO L225 Difference]: With dead ends: 1309 [2020-09-21 10:06:48,865 INFO L226 Difference]: Without dead ends: 906 [2020-09-21 10:06:48,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:06:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-09-21 10:06:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 761. [2020-09-21 10:06:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2020-09-21 10:06:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 889 transitions. [2020-09-21 10:06:49,016 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 889 transitions. Word has length 94 [2020-09-21 10:06:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:49,017 INFO L479 AbstractCegarLoop]: Abstraction has 761 states and 889 transitions. [2020-09-21 10:06:49,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:06:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 889 transitions. [2020-09-21 10:06:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-21 10:06:49,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:49,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:49,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:06:49,021 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:49,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:49,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1149612728, now seen corresponding path program 1 times [2020-09-21 10:06:49,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:49,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244165370] [2020-09-21 10:06:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,340 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:49,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:06:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:06:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:06:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:06:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:06:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:49,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244165370] [2020-09-21 10:06:49,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:49,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:06:49,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246172594] [2020-09-21 10:06:49,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:06:49,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:06:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:06:49,467 INFO L87 Difference]: Start difference. First operand 761 states and 889 transitions. Second operand 8 states. [2020-09-21 10:06:49,906 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:52,832 INFO L93 Difference]: Finished difference Result 1499 states and 1925 transitions. [2020-09-21 10:06:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:06:52,833 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-09-21 10:06:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:52,841 INFO L225 Difference]: With dead ends: 1499 [2020-09-21 10:06:52,842 INFO L226 Difference]: Without dead ends: 1496 [2020-09-21 10:06:52,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:06:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2020-09-21 10:06:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1269. [2020-09-21 10:06:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1269 states. [2020-09-21 10:06:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1498 transitions. [2020-09-21 10:06:53,156 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1498 transitions. Word has length 98 [2020-09-21 10:06:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:53,156 INFO L479 AbstractCegarLoop]: Abstraction has 1269 states and 1498 transitions. [2020-09-21 10:06:53,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:06:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1498 transitions. [2020-09-21 10:06:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-21 10:06:53,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:53,162 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, 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] [2020-09-21 10:06:53,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:06:53,163 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1054262603, now seen corresponding path program 1 times [2020-09-21 10:06:53,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:53,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854725657] [2020-09-21 10:06:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,540 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:53,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:06:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:06:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:06:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:06:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:06:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-21 10:06:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-21 10:06:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-21 10:06:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-21 10:06:53,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854725657] [2020-09-21 10:06:53,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:06:53,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:06:53,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900211067] [2020-09-21 10:06:53,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:06:53,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:06:53,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:06:53,820 INFO L87 Difference]: Start difference. First operand 1269 states and 1498 transitions. Second operand 13 states. [2020-09-21 10:06:54,373 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:54,681 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:54,966 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:56,300 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:58,800 INFO L93 Difference]: Finished difference Result 2281 states and 2814 transitions. [2020-09-21 10:06:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 10:06:58,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 162 [2020-09-21 10:06:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:58,809 INFO L225 Difference]: With dead ends: 2281 [2020-09-21 10:06:58,809 INFO L226 Difference]: Without dead ends: 1182 [2020-09-21 10:06:58,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 10:06:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2020-09-21 10:06:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1046. [2020-09-21 10:06:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2020-09-21 10:06:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1220 transitions. [2020-09-21 10:06:58,969 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1220 transitions. Word has length 162 [2020-09-21 10:06:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:58,969 INFO L479 AbstractCegarLoop]: Abstraction has 1046 states and 1220 transitions. [2020-09-21 10:06:58,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:06:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1220 transitions. [2020-09-21 10:06:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-21 10:06:58,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:58,974 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:58,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:06:58,974 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1747787381, now seen corresponding path program 1 times [2020-09-21 10:06:58,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:58,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43918347] [2020-09-21 10:06:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,394 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:59,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:06:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:06:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:06:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:06:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:06:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-21 10:06:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-21 10:06:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:06:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:06:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-21 10:06:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-21 10:06:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-21 10:06:59,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43918347] [2020-09-21 10:06:59,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:06:59,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:06:59,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368028685] [2020-09-21 10:06:59,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:06:59,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:59,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:06:59,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:06:59,835 INFO L87 Difference]: Start difference. First operand 1046 states and 1220 transitions. Second operand 19 states. [2020-09-21 10:07:00,496 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:07:00,919 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:01,256 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:01,576 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:02,491 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:07:04,156 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 191