/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --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_product36.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:08:25,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:08:25,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:08:25,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:08:25,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:08:25,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:08:25,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:08:25,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:08:25,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:08:25,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:08:25,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:08:25,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:08:25,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:08:25,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:08:25,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:08:25,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:08:25,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:08:25,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:08:25,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:08:25,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:08:25,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:08:25,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:08:25,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:08:25,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:08:25,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:08:25,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:08:25,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:08:25,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:08:25,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:08:25,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:08:25,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:08:25,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:08:25,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:08:25,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:08:25,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:08:25,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:08:25,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:08:25,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:08:25,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:08:25,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:08:25,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:08:25,672 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 17:08:25,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:08:25,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:08:25,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:08:25,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:08:25,697 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:08:25,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:08:25,698 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:08:25,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:08:25,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:08:25,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:08:25,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:08:25,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:08:25,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:08:25,699 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:08:25,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:08:25,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:08:25,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:08:25,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:08:25,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:08:25,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:08:25,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:08:25,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:08:25,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:08:25,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:08:25,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:08:25,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:08:25,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:08:25,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:08:25,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:08:25,703 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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:08:25,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:08:26,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:08:26,013 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:08:26,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:08:26,015 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:08:26,016 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product36.cil.c [2020-08-21 17:08:26,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55e01eda6/60a26a1d28b1490b879ac0fb01bd4124/FLAG69bc6512e [2020-08-21 17:08:26,656 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:08:26,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product36.cil.c [2020-08-21 17:08:26,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55e01eda6/60a26a1d28b1490b879ac0fb01bd4124/FLAG69bc6512e [2020-08-21 17:08:26,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55e01eda6/60a26a1d28b1490b879ac0fb01bd4124 [2020-08-21 17:08:26,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:08:26,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:08:26,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:08:26,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:08:26,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:08:26,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:08:26" (1/1) ... [2020-08-21 17:08:26,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27030054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:26, skipping insertion in model container [2020-08-21 17:08:26,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:08:26" (1/1) ... [2020-08-21 17:08:26,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:08:27,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:08:27,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:08:27,389 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:08:27,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:08:27,669 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:08:27,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27 WrapperNode [2020-08-21 17:08:27,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:08:27,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:08:27,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:08:27,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:08:27,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (1/1) ... [2020-08-21 17:08:27,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (1/1) ... [2020-08-21 17:08:27,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (1/1) ... [2020-08-21 17:08:27,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (1/1) ... [2020-08-21 17:08:27,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (1/1) ... [2020-08-21 17:08:27,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (1/1) ... [2020-08-21 17:08:27,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (1/1) ... [2020-08-21 17:08:27,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:08:27,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:08:27,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:08:27,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:08:27,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (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 17:08:27,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:08:27,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:08:27,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 17:08:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 17:08:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 17:08:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 17:08:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 17:08:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 17:08:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 17:08:27,833 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 17:08:27,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 17:08:27,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 17:08:27,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 17:08:27,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 17:08:27,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 17:08:27,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 17:08:27,834 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 17:08:27,834 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 17:08:27,834 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 17:08:27,834 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 17:08:27,834 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 17:08:27,835 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 17:08:27,835 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 17:08:27,835 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 17:08:27,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:08:27,835 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 17:08:27,835 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 17:08:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 17:08:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 17:08:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 17:08:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 17:08:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 17:08:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 17:08:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 17:08:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 17:08:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 17:08:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 17:08:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 17:08:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-08-21 17:08:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-08-21 17:08:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:08:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:08:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:08:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 17:08:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 17:08:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 17:08:27,839 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 17:08:27,839 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 17:08:27,839 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 17:08:27,839 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 17:08:27,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:08:27,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 17:08:27,839 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:08:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:08:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 17:08:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:08:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:08:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:08:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:08:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 17:08:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:08:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 17:08:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 17:08:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:08:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 17:08:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 17:08:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 17:08:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 17:08:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 17:08:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 17:08:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 17:08:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 17:08:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 17:08:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 17:08:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 17:08:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 17:08:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-08-21 17:08:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 17:08:27,844 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 17:08:27,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:08:27,844 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 17:08:27,844 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 17:08:27,844 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 17:08:27,844 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 17:08:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 17:08:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-08-21 17:08:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 17:08:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 17:08:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 17:08:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 17:08:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 17:08:27,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:08:27,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 17:08:27,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:08:29,018 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:08:29,019 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 17:08:29,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:08:29 BoogieIcfgContainer [2020-08-21 17:08:29,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:08:29,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:08:29,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:08:29,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:08:29,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:08:26" (1/3) ... [2020-08-21 17:08:29,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea1b7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:08:29, skipping insertion in model container [2020-08-21 17:08:29,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:08:27" (2/3) ... [2020-08-21 17:08:29,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea1b7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:08:29, skipping insertion in model container [2020-08-21 17:08:29,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:08:29" (3/3) ... [2020-08-21 17:08:29,032 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product36.cil.c [2020-08-21 17:08:29,043 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:08:29,051 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:08:29,065 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:08:29,088 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:08:29,088 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:08:29,088 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:08:29,089 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:08:29,089 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:08:29,089 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:08:29,089 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:08:29,089 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:08:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-21 17:08:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 17:08:29,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:29,123 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 17:08:29,124 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:29,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:29,130 INFO L82 PathProgramCache]: Analyzing trace with hash 171708589, now seen corresponding path program 1 times [2020-08-21 17:08:29,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:29,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343600454] [2020-08-21 17:08:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,833 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:29,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 17:08:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 17:08:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:29,969 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 17:08:29,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343600454] [2020-08-21 17:08:29,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:29,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:08:29,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197983972] [2020-08-21 17:08:29,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:08:29,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:08:29,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:08:30,000 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-21 17:08:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:08:31,092 INFO L93 Difference]: Finished difference Result 279 states and 365 transitions. [2020-08-21 17:08:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:08:31,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 17:08:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:08:31,109 INFO L225 Difference]: With dead ends: 279 [2020-08-21 17:08:31,110 INFO L226 Difference]: Without dead ends: 157 [2020-08-21 17:08:31,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:08:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-08-21 17:08:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 123. [2020-08-21 17:08:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 17:08:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2020-08-21 17:08:31,206 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 51 [2020-08-21 17:08:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:08:31,206 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2020-08-21 17:08:31,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:08:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2020-08-21 17:08:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 17:08:31,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:31,211 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 17:08:31,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:08:31,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:31,212 INFO L82 PathProgramCache]: Analyzing trace with hash -70243324, now seen corresponding path program 1 times [2020-08-21 17:08:31,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:31,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399486753] [2020-08-21 17:08:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,523 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:31,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:08:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:08:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:31,572 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 17:08:31,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399486753] [2020-08-21 17:08:31,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:31,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:08:31,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112198034] [2020-08-21 17:08:31,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:08:31,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:31,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:08:31,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:08:31,576 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand 5 states. [2020-08-21 17:08:32,013 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:08:32,891 INFO L93 Difference]: Finished difference Result 211 states and 262 transitions. [2020-08-21 17:08:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:08:32,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-21 17:08:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:08:32,896 INFO L225 Difference]: With dead ends: 211 [2020-08-21 17:08:32,896 INFO L226 Difference]: Without dead ends: 147 [2020-08-21 17:08:32,897 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 17:08:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-08-21 17:08:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 114. [2020-08-21 17:08:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 17:08:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2020-08-21 17:08:32,936 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 52 [2020-08-21 17:08:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:08:32,937 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2020-08-21 17:08:32,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:08:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2020-08-21 17:08:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:08:32,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:32,939 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 17:08:32,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:08:32,940 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:32,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1406294977, now seen corresponding path program 1 times [2020-08-21 17:08:32,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:32,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789850289] [2020-08-21 17:08:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,301 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 17:08:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 17:08:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:33,415 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 17:08:33,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789850289] [2020-08-21 17:08:33,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:33,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:08:33,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207112318] [2020-08-21 17:08:33,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:08:33,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:33,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:08:33,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:08:33,418 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand 9 states. [2020-08-21 17:08:33,796 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:08:34,095 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:34,366 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:34,589 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:35,364 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:08:36,932 INFO L93 Difference]: Finished difference Result 390 states and 490 transitions. [2020-08-21 17:08:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 17:08:36,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-08-21 17:08:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:08:36,937 INFO L225 Difference]: With dead ends: 390 [2020-08-21 17:08:36,938 INFO L226 Difference]: Without dead ends: 304 [2020-08-21 17:08:36,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:08:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-21 17:08:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 227. [2020-08-21 17:08:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-08-21 17:08:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 272 transitions. [2020-08-21 17:08:37,012 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 272 transitions. Word has length 57 [2020-08-21 17:08:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:08:37,012 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 272 transitions. [2020-08-21 17:08:37,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:08:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 272 transitions. [2020-08-21 17:08:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 17:08:37,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:37,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:08:37,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:08:37,015 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:37,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:37,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1471569046, now seen corresponding path program 1 times [2020-08-21 17:08:37,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:37,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177164196] [2020-08-21 17:08:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,336 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:37,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:08:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:08:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 17:08:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:37,436 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 17:08:37,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177164196] [2020-08-21 17:08:37,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:37,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:08:37,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840466630] [2020-08-21 17:08:37,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:08:37,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:08:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:08:37,439 INFO L87 Difference]: Start difference. First operand 227 states and 272 transitions. Second operand 9 states. [2020-08-21 17:08:37,840 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:08:38,935 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:39,293 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:39,563 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:39,794 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:08:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:08:40,830 INFO L93 Difference]: Finished difference Result 730 states and 972 transitions. [2020-08-21 17:08:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 17:08:40,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-08-21 17:08:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:08:40,837 INFO L225 Difference]: With dead ends: 730 [2020-08-21 17:08:40,837 INFO L226 Difference]: Without dead ends: 531 [2020-08-21 17:08:40,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-21 17:08:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-08-21 17:08:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 402. [2020-08-21 17:08:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-08-21 17:08:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 484 transitions. [2020-08-21 17:08:40,947 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 484 transitions. Word has length 62 [2020-08-21 17:08:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:08:40,948 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 484 transitions. [2020-08-21 17:08:40,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:08:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 484 transitions. [2020-08-21 17:08:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 17:08:40,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:40,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:08:40,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:08:40,951 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash -675634618, now seen corresponding path program 1 times [2020-08-21 17:08:40,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:40,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449027887] [2020-08-21 17:08:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,229 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:41,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:08:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 17:08:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 17:08:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 17:08:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:41,370 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 17:08:41,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449027887] [2020-08-21 17:08:41,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:41,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 17:08:41,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52587291] [2020-08-21 17:08:41,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:08:41,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:41,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:08:41,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:08:41,376 INFO L87 Difference]: Start difference. First operand 402 states and 484 transitions. Second operand 10 states. [2020-08-21 17:08:41,757 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:08:42,843 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:43,123 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:43,386 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:43,941 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:08:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:08:45,009 INFO L93 Difference]: Finished difference Result 1162 states and 1576 transitions. [2020-08-21 17:08:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 17:08:45,014 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-08-21 17:08:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:08:45,021 INFO L225 Difference]: With dead ends: 1162 [2020-08-21 17:08:45,022 INFO L226 Difference]: Without dead ends: 788 [2020-08-21 17:08:45,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2020-08-21 17:08:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-08-21 17:08:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 593. [2020-08-21 17:08:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2020-08-21 17:08:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 715 transitions. [2020-08-21 17:08:45,185 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 715 transitions. Word has length 66 [2020-08-21 17:08:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:08:45,185 INFO L479 AbstractCegarLoop]: Abstraction has 593 states and 715 transitions. [2020-08-21 17:08:45,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:08:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 715 transitions. [2020-08-21 17:08:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 17:08:45,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:45,188 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] [2020-08-21 17:08:45,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:08:45,189 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1616247053, now seen corresponding path program 1 times [2020-08-21 17:08:45,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:45,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990790291] [2020-08-21 17:08:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,485 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:45,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:08:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 17:08:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:08:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:08:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:08:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 17:08:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:08:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:45,659 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 17:08:45,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990790291] [2020-08-21 17:08:45,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:45,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 17:08:45,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153433900] [2020-08-21 17:08:45,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:08:45,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:08:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:08:45,662 INFO L87 Difference]: Start difference. First operand 593 states and 715 transitions. Second operand 10 states. [2020-08-21 17:08:46,168 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:08:47,171 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:47,427 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-21 17:08:47,685 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:47,967 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:08:49,680 INFO L93 Difference]: Finished difference Result 2139 states and 3058 transitions. [2020-08-21 17:08:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 17:08:49,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-08-21 17:08:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:08:49,695 INFO L225 Difference]: With dead ends: 2139 [2020-08-21 17:08:49,695 INFO L226 Difference]: Without dead ends: 1574 [2020-08-21 17:08:49,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-08-21 17:08:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2020-08-21 17:08:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1135. [2020-08-21 17:08:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1135 states. [2020-08-21 17:08:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1372 transitions. [2020-08-21 17:08:49,987 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1372 transitions. Word has length 84 [2020-08-21 17:08:49,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:08:49,988 INFO L479 AbstractCegarLoop]: Abstraction has 1135 states and 1372 transitions. [2020-08-21 17:08:49,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:08:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1372 transitions. [2020-08-21 17:08:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 17:08:49,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:49,995 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] [2020-08-21 17:08:49,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:08:49,995 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:49,996 INFO L82 PathProgramCache]: Analyzing trace with hash 567429874, now seen corresponding path program 1 times [2020-08-21 17:08:49,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:49,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81897311] [2020-08-21 17:08:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,258 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:50,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:08:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 17:08:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:08:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:08:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:08:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 17:08:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:08:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:50,466 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 17:08:50,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81897311] [2020-08-21 17:08:50,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:50,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 17:08:50,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193453308] [2020-08-21 17:08:50,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:08:50,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:50,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:08:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:08:50,481 INFO L87 Difference]: Start difference. First operand 1135 states and 1372 transitions. Second operand 10 states. [2020-08-21 17:08:52,034 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:08:52,292 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-21 17:08:52,544 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:52,786 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:08:54,140 INFO L93 Difference]: Finished difference Result 2694 states and 3601 transitions. [2020-08-21 17:08:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 17:08:54,141 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-08-21 17:08:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:08:54,153 INFO L225 Difference]: With dead ends: 2694 [2020-08-21 17:08:54,154 INFO L226 Difference]: Without dead ends: 1587 [2020-08-21 17:08:54,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 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 17:08:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2020-08-21 17:08:54,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1175. [2020-08-21 17:08:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-08-21 17:08:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1412 transitions. [2020-08-21 17:08:54,421 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1412 transitions. Word has length 84 [2020-08-21 17:08:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:08:54,423 INFO L479 AbstractCegarLoop]: Abstraction has 1175 states and 1412 transitions. [2020-08-21 17:08:54,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:08:54,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1412 transitions. [2020-08-21 17:08:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 17:08:54,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:54,427 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] [2020-08-21 17:08:54,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:08:54,427 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1953633268, now seen corresponding path program 1 times [2020-08-21 17:08:54,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:54,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94507011] [2020-08-21 17:08:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,736 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:54,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:08:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 17:08:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:08:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:08:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:08:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 17:08:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:08:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:54,915 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 17:08:54,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94507011] [2020-08-21 17:08:54,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:54,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 17:08:54,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584028889] [2020-08-21 17:08:54,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:08:54,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:08:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:08:54,917 INFO L87 Difference]: Start difference. First operand 1175 states and 1412 transitions. Second operand 12 states. [2020-08-21 17:08:55,571 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:55,811 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:56,054 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:56,889 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:57,165 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:57,431 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:08:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:08:58,729 INFO L93 Difference]: Finished difference Result 2386 states and 3145 transitions. [2020-08-21 17:08:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:08:58,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-08-21 17:08:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:08:58,738 INFO L225 Difference]: With dead ends: 2386 [2020-08-21 17:08:58,738 INFO L226 Difference]: Without dead ends: 1239 [2020-08-21 17:08:58,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-21 17:08:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-08-21 17:08:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 951. [2020-08-21 17:08:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2020-08-21 17:08:58,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1112 transitions. [2020-08-21 17:08:58,947 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1112 transitions. Word has length 84 [2020-08-21 17:08:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:08:58,947 INFO L479 AbstractCegarLoop]: Abstraction has 951 states and 1112 transitions. [2020-08-21 17:08:58,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:08:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1112 transitions. [2020-08-21 17:08:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 17:08:58,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:08:58,950 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] [2020-08-21 17:08:58,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:08:58,951 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:08:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:08:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1427109873, now seen corresponding path program 1 times [2020-08-21 17:08:58,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:08:58,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608383201] [2020-08-21 17:08:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:08:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,224 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:08:59,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:08:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:08:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:08:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:08:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:08:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:08:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:08:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:08:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 17:08:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:08:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:08:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:08:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 17:08:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 17:08:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:08:59,319 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 17:08:59,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608383201] [2020-08-21 17:08:59,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:08:59,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:08:59,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625579478] [2020-08-21 17:08:59,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:08:59,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:08:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:08:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:08:59,321 INFO L87 Difference]: Start difference. First operand 951 states and 1112 transitions. Second operand 8 states. [2020-08-21 17:08:59,761 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:09:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:09:01,967 INFO L93 Difference]: Finished difference Result 1906 states and 2527 transitions. [2020-08-21 17:09:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 17:09:01,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 88 [2020-08-21 17:09:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:09:01,981 INFO L225 Difference]: With dead ends: 1906 [2020-08-21 17:09:01,981 INFO L226 Difference]: Without dead ends: 1903 [2020-08-21 17:09:01,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-08-21 17:09:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2020-08-21 17:09:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1456. [2020-08-21 17:09:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1456 states. [2020-08-21 17:09:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 1720 transitions. [2020-08-21 17:09:02,313 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 1720 transitions. Word has length 88 [2020-08-21 17:09:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:09:02,314 INFO L479 AbstractCegarLoop]: Abstraction has 1456 states and 1720 transitions. [2020-08-21 17:09:02,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:09:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 1720 transitions. [2020-08-21 17:09:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 17:09:02,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:09:02,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:09:02,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:09:02,323 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:09:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:09:02,323 INFO L82 PathProgramCache]: Analyzing trace with hash 475998026, now seen corresponding path program 1 times [2020-08-21 17:09:02,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:09:02,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625569895] [2020-08-21 17:09:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:09:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:09:02,404 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:09:02,405 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:09:02,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:09:02,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:09:02 BoogieIcfgContainer [2020-08-21 17:09:02,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:09:02,462 INFO L168 Benchmark]: Toolchain (without parser) took 35518.20 ms. Allocated memory was 140.0 MB in the beginning and 699.9 MB in the end (delta: 559.9 MB). Free memory was 102.0 MB in the beginning and 415.1 MB in the end (delta: -313.0 MB). Peak memory consumption was 246.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:09:02,462 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:09:02,466 INFO L168 Benchmark]: CACSL2BoogieTranslator took 726.25 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.8 MB in the beginning and 173.8 MB in the end (delta: -71.9 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:09:02,470 INFO L168 Benchmark]: Boogie Preprocessor took 86.78 ms. Allocated memory is still 203.9 MB. Free memory was 173.8 MB in the beginning and 169.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:09:02,471 INFO L168 Benchmark]: RCFGBuilder took 1266.88 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 169.6 MB in the beginning and 200.9 MB in the end (delta: -31.3 MB). Peak memory consumption was 85.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:09:02,472 INFO L168 Benchmark]: TraceAbstraction took 33432.25 ms. Allocated memory was 237.5 MB in the beginning and 699.9 MB in the end (delta: 462.4 MB). Free memory was 199.5 MB in the beginning and 415.1 MB in the end (delta: -215.6 MB). Peak memory consumption was 246.8 MB. Max. memory is 7.1 GB. [2020-08-21 17:09:02,481 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 726.25 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.8 MB in the beginning and 173.8 MB in the end (delta: -71.9 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.78 ms. Allocated memory is still 203.9 MB. Free memory was 173.8 MB in the beginning and 169.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1266.88 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 169.6 MB in the beginning and 200.9 MB in the end (delta: -31.3 MB). Peak memory consumption was 85.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33432.25 ms. Allocated memory was 237.5 MB in the beginning and 699.9 MB in the end (delta: 462.4 MB). Free memory was 199.5 MB in the beginning and 415.1 MB in the end (delta: -215.6 MB). Peak memory consumption was 246.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 900]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L47] int waterLevel = 1; [L48] int methaneLevelCritical = 0; [L310] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L545] int cleanupTimeShifts = 4; [L651] int pumpRunning = 0; [L652] int systemActive = 1; [L905] int methAndRunningLastTime ; [L623] int retValue_acc ; [L624] int tmp ; [L628] FCALL select_helpers() [L629] FCALL select_features() [L630] CALL, EXPR valid_product() [L536] int retValue_acc ; [L539] retValue_acc = 1 [L540] return (retValue_acc); [L630] RET, EXPR valid_product() [L630] tmp = valid_product() [L632] COND TRUE \read(tmp) [L634] FCALL setup() [L635] CALL runTest() [L616] CALL __utac_acc__Specification2_spec__1() [L910] methAndRunningLastTime = 0 [L616] RET __utac_acc__Specification2_spec__1() [L617] CALL test() [L828] int splverifierCounter ; [L829] int tmp ; [L830] int tmp___0 ; [L831] int tmp___1 ; [L832] int tmp___2 ; [L835] splverifierCounter = 0 [L837] COND TRUE 1 [L839] COND TRUE splverifierCounter < 4 [L845] tmp = __VERIFIER_nondet_int() [L847] COND TRUE \read(tmp) [L849] CALL waterRise() [L65] COND TRUE waterLevel < 2 [L66] waterLevel = waterLevel + 1 [L849] RET waterRise() [L855] tmp___0 = __VERIFIER_nondet_int() [L857] COND TRUE \read(tmp___0) [L859] CALL changeMethaneLevel() [L77] COND FALSE !(\read(methaneLevelCritical)) [L80] methaneLevelCritical = 1 [L859] RET changeMethaneLevel() [L865] tmp___2 = __VERIFIER_nondet_int() [L867] COND FALSE !(\read(tmp___2)) [L873] tmp___1 = __VERIFIER_nondet_int() [L875] COND FALSE !(\read(tmp___1)) [L884] CALL timeShift() [L659] COND FALSE !(\read(pumpRunning)) [L666] COND TRUE \read(systemActive) [L668] CALL processEnvironment() [L688] int tmp ; [L691] COND TRUE ! pumpRunning [L693] CALL, EXPR isHighWaterLevel() [L785] int retValue_acc ; [L786] int tmp ; [L787] int tmp___0 ; [L791] CALL, EXPR isHighWaterSensorDry() [L127] int retValue_acc ; [L130] COND FALSE !(waterLevel < 2) [L134] retValue_acc = 0 [L135] return (retValue_acc); [L791] RET, EXPR isHighWaterSensorDry() [L791] tmp = isHighWaterSensorDry() [L793] COND FALSE !(\read(tmp)) [L796] tmp___0 = 1 [L798] retValue_acc = tmp___0 [L799] return (retValue_acc); [L693] RET, EXPR isHighWaterLevel() [L693] tmp = isHighWaterLevel() [L695] COND TRUE \read(tmp) [L697] CALL activatePump() [L716] pumpRunning = 1 [L697] RET activatePump() [L668] RET processEnvironment() [L674] CALL __utac_acc__Specification2_spec__2() [L915] int tmp ; [L916] int tmp___0 ; [L920] CALL, EXPR isMethaneLevelCritical() [L86] int retValue_acc ; [L89] retValue_acc = methaneLevelCritical [L90] return (retValue_acc); [L920] RET, EXPR isMethaneLevelCritical() [L920] tmp = isMethaneLevelCritical() [L922] COND TRUE \read(tmp) [L924] CALL, EXPR isPumpRunning() [L740] int retValue_acc ; [L743] retValue_acc = pumpRunning [L744] return (retValue_acc); [L924] RET, EXPR isPumpRunning() [L924] tmp___0 = isPumpRunning() [L926] COND TRUE \read(tmp___0) [L927] COND FALSE !(\read(methAndRunningLastTime)) [L932] methAndRunningLastTime = 1 [L674] RET __utac_acc__Specification2_spec__2() [L884] RET timeShift() [L837] COND TRUE 1 [L839] COND TRUE splverifierCounter < 4 [L845] tmp = __VERIFIER_nondet_int() [L847] COND FALSE !(\read(tmp)) [L855] tmp___0 = __VERIFIER_nondet_int() [L857] COND FALSE !(\read(tmp___0)) [L865] tmp___2 = __VERIFIER_nondet_int() [L867] COND FALSE !(\read(tmp___2)) [L873] tmp___1 = __VERIFIER_nondet_int() [L875] COND FALSE !(\read(tmp___1)) [L884] CALL timeShift() [L659] COND TRUE \read(pumpRunning) [L661] CALL lowerWaterLevel() [L53] COND TRUE waterLevel > 0 [L54] waterLevel = waterLevel - 1 [L661] RET lowerWaterLevel() [L666] COND TRUE \read(systemActive) [L668] CALL processEnvironment() [L688] int tmp ; [L691] COND FALSE !(! pumpRunning) [L706] FCALL processEnvironment__wrappee__base() [L668] RET processEnvironment() [L674] CALL __utac_acc__Specification2_spec__2() [L915] int tmp ; [L916] int tmp___0 ; [L920] CALL, EXPR isMethaneLevelCritical() [L86] int retValue_acc ; [L89] retValue_acc = methaneLevelCritical [L90] return (retValue_acc); [L920] RET, EXPR isMethaneLevelCritical() [L920] tmp = isMethaneLevelCritical() [L922] COND TRUE \read(tmp) [L924] CALL, EXPR isPumpRunning() [L740] int retValue_acc ; [L743] retValue_acc = pumpRunning [L744] return (retValue_acc); [L924] RET, EXPR isPumpRunning() [L924] tmp___0 = isPumpRunning() [L926] COND TRUE \read(tmp___0) [L927] COND TRUE \read(methAndRunningLastTime) [L929] CALL __automaton_fail() [L900] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 230 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 33.3s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 27.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 960 SDtfs, 2942 SDslu, 1456 SDs, 0 SdLazy, 6229 SolverSat, 2310 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 377 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1456occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 9 MinimizatonAttempts, 2054 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 759 NumberOfCodeBlocks, 759 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 619 ConstructedInterpolants, 0 QuantifiedInterpolants, 192303 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...