/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 true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product62.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:21:08,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:21:08,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:21:08,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:21:08,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:21:08,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:21:08,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:21:08,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:21:08,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:21:08,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:21:08,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:21:08,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:21:08,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:21:08,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:21:08,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:21:08,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:21:08,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:21:08,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:21:08,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:21:08,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:21:08,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:21:08,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:21:08,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:21:08,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:21:08,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:21:08,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:21:08,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:21:08,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:21:08,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:21:08,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:21:08,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:21:08,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:21:08,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:21:08,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:21:08,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:21:08,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:21:08,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:21:08,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:21:08,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:21:08,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:21:08,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:21:08,682 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 [2020-08-21 16:21:08,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:21:08,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:21:08,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:21:08,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:21:08,722 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:21:08,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:21:08,723 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:21:08,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:21:08,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:21:08,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:21:08,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:21:08,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:21:08,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:21:08,726 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:21:08,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:21:08,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:21:08,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:21:08,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:21:08,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:21:08,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:21:08,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:21:08,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:21:08,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:21:08,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:21:08,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:21:08,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:21:08,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:21:08,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:21:08,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:21:08,729 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:21:09,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:21:09,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:21:09,044 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:21:09,046 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:21:09,046 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:21:09,047 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product62.cil.c [2020-08-21 16:21:09,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dc4c1199/9bb1e87074fa4e7da487baa200b10f27/FLAG790d22a5b [2020-08-21 16:21:09,658 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:21:09,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product62.cil.c [2020-08-21 16:21:09,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dc4c1199/9bb1e87074fa4e7da487baa200b10f27/FLAG790d22a5b [2020-08-21 16:21:09,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dc4c1199/9bb1e87074fa4e7da487baa200b10f27 [2020-08-21 16:21:09,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:21:09,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:21:09,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:21:09,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:21:09,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:21:09,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:21:09" (1/1) ... [2020-08-21 16:21:09,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4d4318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:09, skipping insertion in model container [2020-08-21 16:21:09,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:21:09" (1/1) ... [2020-08-21 16:21:09,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:21:10,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:21:10,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:21:10,464 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:21:10,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:21:10,611 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:21:10,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10 WrapperNode [2020-08-21 16:21:10,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:21:10,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:21:10,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:21:10,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:21:10,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (1/1) ... [2020-08-21 16:21:10,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (1/1) ... [2020-08-21 16:21:10,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (1/1) ... [2020-08-21 16:21:10,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (1/1) ... [2020-08-21 16:21:10,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (1/1) ... [2020-08-21 16:21:10,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (1/1) ... [2020-08-21 16:21:10,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (1/1) ... [2020-08-21 16:21:10,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:21:10,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:21:10,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:21:10,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:21:10,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (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 [2020-08-21 16:21:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:21:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:21:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 16:21:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 16:21:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 16:21:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 16:21:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 16:21:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 16:21:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 16:21:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 16:21:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 16:21:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 16:21:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 16:21:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:21:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 16:21:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-08-21 16:21:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-08-21 16:21:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 16:21:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 16:21:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 16:21:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 16:21:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 16:21:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 16:21:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 16:21:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 16:21:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 16:21:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 16:21:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 16:21:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 16:21:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 16:21:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 16:21:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 16:21:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 16:21:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 16:21:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 16:21:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-21 16:21:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 16:21:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 16:21:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 16:21:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 16:21:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 16:21:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 16:21:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 16:21:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 16:21:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:21:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:21:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 16:21:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 16:21:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:21:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 16:21:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 16:21:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:21:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 16:21:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:21:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 16:21:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 16:21:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:21:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 16:21:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 16:21:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:21:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 16:21:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 16:21:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:21:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 16:21:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 16:21:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 16:21:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 16:21:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 16:21:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 16:21:10,839 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 16:21:10,839 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 16:21:10,840 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-08-21 16:21:10,840 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 16:21:10,841 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 16:21:10,841 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 16:21:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 16:21:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 16:21:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:21:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 16:21:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 16:21:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 16:21:10,843 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-08-21 16:21:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 16:21:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 16:21:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 16:21:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 16:21:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 16:21:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 16:21:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 16:21:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 16:21:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 16:21:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 16:21:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 16:21:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 16:21:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 16:21:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 16:21:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 16:21:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 16:21:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-21 16:21:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:21:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 16:21:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:21:11,977 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:21:11,977 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 16:21:11,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:21:11 BoogieIcfgContainer [2020-08-21 16:21:11,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:21:11,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:21:11,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:21:11,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:21:11,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:21:09" (1/3) ... [2020-08-21 16:21:11,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef2662e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:21:11, skipping insertion in model container [2020-08-21 16:21:11,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:21:10" (2/3) ... [2020-08-21 16:21:11,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef2662e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:21:11, skipping insertion in model container [2020-08-21 16:21:11,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:21:11" (3/3) ... [2020-08-21 16:21:11,991 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product62.cil.c [2020-08-21 16:21:12,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:21:12,010 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:21:12,024 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:21:12,050 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:21:12,050 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:21:12,050 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:21:12,050 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:21:12,051 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:21:12,051 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:21:12,051 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:21:12,051 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:21:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states. [2020-08-21 16:21:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 16:21:12,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:12,089 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] [2020-08-21 16:21:12,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:12,096 INFO L82 PathProgramCache]: Analyzing trace with hash -519940638, now seen corresponding path program 1 times [2020-08-21 16:21:12,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:12,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177392263] [2020-08-21 16:21:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,758 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:12,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 16:21:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 16:21:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:21:12,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177392263] [2020-08-21 16:21:12,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:12,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:21:12,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834864716] [2020-08-21 16:21:12,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:21:12,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:21:12,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:21:12,920 INFO L87 Difference]: Start difference. First operand 202 states. Second operand 4 states. [2020-08-21 16:21:14,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:14,218 INFO L93 Difference]: Finished difference Result 354 states and 460 transitions. [2020-08-21 16:21:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:21:14,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 16:21:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:14,236 INFO L225 Difference]: With dead ends: 354 [2020-08-21 16:21:14,236 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 16:21:14,241 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 [2020-08-21 16:21:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 16:21:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 159. [2020-08-21 16:21:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-21 16:21:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2020-08-21 16:21:14,341 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 51 [2020-08-21 16:21:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:14,342 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2020-08-21 16:21:14,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:21:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2020-08-21 16:21:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 16:21:14,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:14,346 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] [2020-08-21 16:21:14,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:21:14,347 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash -183354494, now seen corresponding path program 1 times [2020-08-21 16:21:14,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:14,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572764051] [2020-08-21 16:21:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,711 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:14,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:21:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 16:21:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:21:14,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572764051] [2020-08-21 16:21:14,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:14,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:21:14,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694555975] [2020-08-21 16:21:14,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:21:14,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:14,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:21:14,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:21:14,808 INFO L87 Difference]: Start difference. First operand 159 states and 189 transitions. Second operand 5 states. [2020-08-21 16:21:15,297 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:16,506 INFO L93 Difference]: Finished difference Result 295 states and 367 transitions. [2020-08-21 16:21:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:21:16,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-21 16:21:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:16,515 INFO L225 Difference]: With dead ends: 295 [2020-08-21 16:21:16,515 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 16:21:16,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:21:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 16:21:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 150. [2020-08-21 16:21:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-21 16:21:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2020-08-21 16:21:16,562 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 52 [2020-08-21 16:21:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:16,562 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2020-08-21 16:21:16,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:21:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2020-08-21 16:21:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 16:21:16,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:16,565 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] [2020-08-21 16:21:16,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:21:16,565 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:16,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1707012514, now seen corresponding path program 1 times [2020-08-21 16:21:16,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:16,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48774658] [2020-08-21 16:21:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:16,927 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:16,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:16,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:16,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:16,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:16,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:17,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:17,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 16:21:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:17,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 16:21:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:21:17,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48774658] [2020-08-21 16:21:17,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:17,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 16:21:17,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41634725] [2020-08-21 16:21:17,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:21:17,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:21:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:21:17,016 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand 9 states. [2020-08-21 16:21:17,364 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:17,684 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:17,923 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:18,151 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:19,678 INFO L93 Difference]: Finished difference Result 308 states and 386 transitions. [2020-08-21 16:21:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:21:19,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-08-21 16:21:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:19,684 INFO L225 Difference]: With dead ends: 308 [2020-08-21 16:21:19,685 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 16:21:19,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:21:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 16:21:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 150. [2020-08-21 16:21:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-21 16:21:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 176 transitions. [2020-08-21 16:21:19,752 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 176 transitions. Word has length 57 [2020-08-21 16:21:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:19,753 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 176 transitions. [2020-08-21 16:21:19,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:21:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 176 transitions. [2020-08-21 16:21:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 16:21:19,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:19,756 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] [2020-08-21 16:21:19,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:21:19,757 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:19,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1819519357, now seen corresponding path program 1 times [2020-08-21 16:21:19,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:19,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566301327] [2020-08-21 16:21:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,057 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:20,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 16:21:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 16:21:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 16:21:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:21:20,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566301327] [2020-08-21 16:21:20,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:20,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:21:20,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252995376] [2020-08-21 16:21:20,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:21:20,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:20,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:21:20,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:21:20,192 INFO L87 Difference]: Start difference. First operand 150 states and 176 transitions. Second operand 7 states. [2020-08-21 16:21:20,554 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:21,871 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:22,825 INFO L93 Difference]: Finished difference Result 418 states and 526 transitions. [2020-08-21 16:21:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:21:22,825 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-08-21 16:21:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:22,829 INFO L225 Difference]: With dead ends: 418 [2020-08-21 16:21:22,829 INFO L226 Difference]: Without dead ends: 296 [2020-08-21 16:21:22,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:21:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-08-21 16:21:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 247. [2020-08-21 16:21:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-08-21 16:21:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 282 transitions. [2020-08-21 16:21:22,893 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 282 transitions. Word has length 75 [2020-08-21 16:21:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:22,894 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 282 transitions. [2020-08-21 16:21:22,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:21:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 282 transitions. [2020-08-21 16:21:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 16:21:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:22,897 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] [2020-08-21 16:21:22,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:21:22,898 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash 948942276, now seen corresponding path program 1 times [2020-08-21 16:21:22,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:22,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866281543] [2020-08-21 16:21:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,182 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:23,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 16:21:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 16:21:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 16:21:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:21:23,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866281543] [2020-08-21 16:21:23,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:23,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 16:21:23,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582769460] [2020-08-21 16:21:23,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:21:23,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:23,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:21:23,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:21:23,292 INFO L87 Difference]: Start difference. First operand 247 states and 282 transitions. Second operand 9 states. [2020-08-21 16:21:23,783 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:24,840 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:25,182 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:25,792 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:26,031 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:27,359 INFO L93 Difference]: Finished difference Result 737 states and 912 transitions. [2020-08-21 16:21:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 16:21:27,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-08-21 16:21:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:27,364 INFO L225 Difference]: With dead ends: 737 [2020-08-21 16:21:27,364 INFO L226 Difference]: Without dead ends: 518 [2020-08-21 16:21:27,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:21:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-21 16:21:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 442. [2020-08-21 16:21:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-08-21 16:21:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 504 transitions. [2020-08-21 16:21:27,463 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 504 transitions. Word has length 89 [2020-08-21 16:21:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:27,464 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 504 transitions. [2020-08-21 16:21:27,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:21:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 504 transitions. [2020-08-21 16:21:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 16:21:27,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:27,466 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] [2020-08-21 16:21:27,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:21:27,467 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:27,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1944159016, now seen corresponding path program 1 times [2020-08-21 16:21:27,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:27,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646868237] [2020-08-21 16:21:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,742 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:27,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:21:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:21:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 16:21:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 16:21:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:21:27,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646868237] [2020-08-21 16:21:27,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:27,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 16:21:27,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952418522] [2020-08-21 16:21:27,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:21:27,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:27,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:21:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:21:27,934 INFO L87 Difference]: Start difference. First operand 442 states and 504 transitions. Second operand 10 states. [2020-08-21 16:21:28,332 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:29,623 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:30,849 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:31,092 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:31,342 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:31,787 INFO L93 Difference]: Finished difference Result 970 states and 1183 transitions. [2020-08-21 16:21:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 16:21:31,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-08-21 16:21:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:31,794 INFO L225 Difference]: With dead ends: 970 [2020-08-21 16:21:31,794 INFO L226 Difference]: Without dead ends: 556 [2020-08-21 16:21:31,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-08-21 16:21:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-08-21 16:21:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 441. [2020-08-21 16:21:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-08-21 16:21:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 501 transitions. [2020-08-21 16:21:31,893 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 501 transitions. Word has length 93 [2020-08-21 16:21:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:31,893 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 501 transitions. [2020-08-21 16:21:31,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:21:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 501 transitions. [2020-08-21 16:21:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 16:21:31,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:31,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:21:31,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:21:31,897 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash -412136482, now seen corresponding path program 1 times [2020-08-21 16:21:31,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:31,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352509262] [2020-08-21 16:21:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,143 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:32,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:21:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:21:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 16:21:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 16:21:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 16:21:32,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352509262] [2020-08-21 16:21:32,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:32,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 16:21:32,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076127134] [2020-08-21 16:21:32,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:21:32,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:32,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:21:32,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:21:32,341 INFO L87 Difference]: Start difference. First operand 441 states and 501 transitions. Second operand 10 states. [2020-08-21 16:21:33,796 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:34,076 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-21 16:21:34,311 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:34,539 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:35,906 INFO L93 Difference]: Finished difference Result 977 states and 1216 transitions. [2020-08-21 16:21:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:21:35,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2020-08-21 16:21:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:35,913 INFO L225 Difference]: With dead ends: 977 [2020-08-21 16:21:35,913 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 16:21:35,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:21:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 16:21:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 451. [2020-08-21 16:21:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-08-21 16:21:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 511 transitions. [2020-08-21 16:21:36,002 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 511 transitions. Word has length 109 [2020-08-21 16:21:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:36,003 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 511 transitions. [2020-08-21 16:21:36,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:21:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 511 transitions. [2020-08-21 16:21:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 16:21:36,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:36,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:21:36,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:21:36,008 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:36,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1527025564, now seen corresponding path program 1 times [2020-08-21 16:21:36,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:36,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471174025] [2020-08-21 16:21:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,278 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:36,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:21:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:21:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 16:21:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 16:21:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 16:21:36,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471174025] [2020-08-21 16:21:36,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:36,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 16:21:36,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652236864] [2020-08-21 16:21:36,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:21:36,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:36,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:21:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:21:36,462 INFO L87 Difference]: Start difference. First operand 451 states and 511 transitions. Second operand 12 states. [2020-08-21 16:21:37,216 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:37,457 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:37,701 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:38,462 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:38,728 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:38,979 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:21:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:40,571 INFO L93 Difference]: Finished difference Result 997 states and 1238 transitions. [2020-08-21 16:21:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:21:40,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 109 [2020-08-21 16:21:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:40,576 INFO L225 Difference]: With dead ends: 997 [2020-08-21 16:21:40,577 INFO L226 Difference]: Without dead ends: 574 [2020-08-21 16:21:40,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:21:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-08-21 16:21:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 459. [2020-08-21 16:21:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-08-21 16:21:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 519 transitions. [2020-08-21 16:21:40,652 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 519 transitions. Word has length 109 [2020-08-21 16:21:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:40,652 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 519 transitions. [2020-08-21 16:21:40,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:21:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 519 transitions. [2020-08-21 16:21:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 16:21:40,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:40,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:21:40,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:21:40,655 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1998771717, now seen corresponding path program 1 times [2020-08-21 16:21:40,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:40,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133776387] [2020-08-21 16:21:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,925 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:40,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:21:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:21:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:40,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 16:21:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 16:21:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 16:21:41,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133776387] [2020-08-21 16:21:41,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:21:41,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:21:41,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972119423] [2020-08-21 16:21:41,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:21:41,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:21:41,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:21:41,094 INFO L87 Difference]: Start difference. First operand 459 states and 519 transitions. Second operand 8 states. [2020-08-21 16:21:41,502 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:42,269 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:45,115 INFO L93 Difference]: Finished difference Result 1365 states and 1751 transitions. [2020-08-21 16:21:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 16:21:45,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-08-21 16:21:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:45,123 INFO L225 Difference]: With dead ends: 1365 [2020-08-21 16:21:45,123 INFO L226 Difference]: Without dead ends: 934 [2020-08-21 16:21:45,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-08-21 16:21:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-08-21 16:21:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 789. [2020-08-21 16:21:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2020-08-21 16:21:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 921 transitions. [2020-08-21 16:21:45,281 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 921 transitions. Word has length 109 [2020-08-21 16:21:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:45,282 INFO L479 AbstractCegarLoop]: Abstraction has 789 states and 921 transitions. [2020-08-21 16:21:45,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:21:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 921 transitions. [2020-08-21 16:21:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-21 16:21:45,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:45,284 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 16:21:45,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:21:45,285 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1262789055, now seen corresponding path program 1 times [2020-08-21 16:21:45,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:45,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153409479] [2020-08-21 16:21:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,541 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:45,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 16:21:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 16:21:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 16:21:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:45,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:46,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 16:21:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:46,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 16:21:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:21:46,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153409479] [2020-08-21 16:21:46,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:21:46,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 16:21:46,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841654305] [2020-08-21 16:21:46,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 16:21:46,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 16:21:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:21:46,029 INFO L87 Difference]: Start difference. First operand 789 states and 921 transitions. Second operand 18 states. [2020-08-21 16:21:46,876 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:47,212 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:47,558 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:47,813 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:48,552 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:49,766 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:50,124 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:50,430 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:50,712 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:51,058 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:51,350 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:51,899 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 193 [2020-08-21 16:21:52,448 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 193 [2020-08-21 16:21:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:55,463 INFO L93 Difference]: Finished difference Result 1665 states and 2044 transitions. [2020-08-21 16:21:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-21 16:21:55,466 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-08-21 16:21:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:55,472 INFO L225 Difference]: With dead ends: 1665 [2020-08-21 16:21:55,472 INFO L226 Difference]: Without dead ends: 904 [2020-08-21 16:21:55,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2020-08-21 16:21:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-08-21 16:21:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 768. [2020-08-21 16:21:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-08-21 16:21:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 886 transitions. [2020-08-21 16:21:55,646 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 886 transitions. Word has length 113 [2020-08-21 16:21:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:55,647 INFO L479 AbstractCegarLoop]: Abstraction has 768 states and 886 transitions. [2020-08-21 16:21:55,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 16:21:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 886 transitions. [2020-08-21 16:21:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-08-21 16:21:55,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:55,658 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:21:55,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:21:55,658 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:55,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1271659967, now seen corresponding path program 1 times [2020-08-21 16:21:55,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:55,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343101715] [2020-08-21 16:21:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,034 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:56,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 16:21:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 16:21:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:21:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 16:21:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-21 16:21:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 16:21:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 16:21:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 16:21:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-21 16:21:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-21 16:21:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-21 16:21:56,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343101715] [2020-08-21 16:21:56,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:21:56,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 16:21:56,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335536982] [2020-08-21 16:21:56,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 16:21:56,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 16:21:56,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:21:56,575 INFO L87 Difference]: Start difference. First operand 768 states and 886 transitions. Second operand 19 states. [2020-08-21 16:21:57,471 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:57,799 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:58,052 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:58,304 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:21:59,049 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:22:00,182 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:00,508 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:00,795 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:01,073 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:01,417 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:01,710 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:03,087 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:03,340 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:03,624 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:03,892 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:22:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:22:05,305 INFO L93 Difference]: Finished difference Result 1426 states and 1761 transitions. [2020-08-21 16:22:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-21 16:22:05,306 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 183 [2020-08-21 16:22:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:22:05,307 INFO L225 Difference]: With dead ends: 1426 [2020-08-21 16:22:05,307 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:22:05,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2020-08-21 16:22:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:22:05,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:22:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:22:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:22:05,315 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 183 [2020-08-21 16:22:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:22:05,315 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:22:05,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 16:22:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:22:05,316 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:22:05,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:22:05,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:22:06,929 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 300 DAG size of output: 256