/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:00:44,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:00:44,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:00:44,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:00:44,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:00:44,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:00:44,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:00:44,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:00:44,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:00:44,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:00:44,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:00:44,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:00:44,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:00:44,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:00:44,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:00:44,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:00:44,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:00:44,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:00:44,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:00:44,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:00:44,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:00:44,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:00:44,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:00:44,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:00:44,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:00:44,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:00:44,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:00:44,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:00:44,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:00:44,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:00:44,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:00:44,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:00:44,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:00:44,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:00:44,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:00:44,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:00:44,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:00:44,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:00:44,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:00:44,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:00:44,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:00:44,422 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 [2020-08-19 01:00:44,445 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:00:44,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:00:44,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:00:44,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:00:44,449 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:00:44,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:00:44,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:00:44,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:00:44,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:00:44,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:00:44,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:00:44,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:00:44,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:00:44,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:00:44,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:00:44,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:00:44,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:00:44,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:00:44,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:00:44,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:00:44,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:00:44,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:00:44,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:00:44,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:00:44,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:00:44,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:00:44,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:00:44,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:00:44,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:00:44,457 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:00:44,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:00:44,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:00:44,798 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:00:44,800 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:00:44,800 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:00:44,801 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c [2020-08-19 01:00:44,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/426512495/6c1b742c23714137a7c04f87c19d4ff1/FLAGafc977a3e [2020-08-19 01:00:45,332 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:00:45,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c [2020-08-19 01:00:45,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/426512495/6c1b742c23714137a7c04f87c19d4ff1/FLAGafc977a3e [2020-08-19 01:00:45,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/426512495/6c1b742c23714137a7c04f87c19d4ff1 [2020-08-19 01:00:45,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:00:45,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:00:45,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:00:45,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:00:45,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:00:45,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:00:45" (1/1) ... [2020-08-19 01:00:45,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f15c313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:45, skipping insertion in model container [2020-08-19 01:00:45,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:00:45" (1/1) ... [2020-08-19 01:00:45,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:00:45,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:00:46,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:00:46,245 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:00:46,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:00:46,417 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:00:46,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46 WrapperNode [2020-08-19 01:00:46,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:00:46,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:00:46,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:00:46,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:00:46,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (1/1) ... [2020-08-19 01:00:46,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (1/1) ... [2020-08-19 01:00:46,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (1/1) ... [2020-08-19 01:00:46,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (1/1) ... [2020-08-19 01:00:46,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (1/1) ... [2020-08-19 01:00:46,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (1/1) ... [2020-08-19 01:00:46,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (1/1) ... [2020-08-19 01:00:46,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:00:46,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:00:46,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:00:46,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:00:46,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (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 [2020-08-19 01:00:46,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:00:46,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:00:46,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-19 01:00:46,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-19 01:00:46,610 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-19 01:00:46,610 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-19 01:00:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-19 01:00:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-19 01:00:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:00:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-19 01:00:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-19 01:00:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-19 01:00:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-19 01:00:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-19 01:00:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-19 01:00:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-19 01:00:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-19 01:00:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-19 01:00:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-19 01:00:46,615 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-19 01:00:46,615 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-19 01:00:46,615 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-19 01:00:46,615 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-19 01:00:46,615 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-19 01:00:46,615 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-19 01:00:46,616 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-19 01:00:46,617 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-19 01:00:46,617 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-19 01:00:46,617 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-19 01:00:46,617 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-19 01:00:46,617 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-19 01:00:46,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-19 01:00:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-19 01:00:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-19 01:00:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-19 01:00:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-19 01:00:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-19 01:00:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-19 01:00:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:00:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:00:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-19 01:00:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-19 01:00:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-19 01:00:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-19 01:00:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-19 01:00:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-19 01:00:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-19 01:00:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-19 01:00:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-19 01:00:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-19 01:00:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-19 01:00:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-19 01:00:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-19 01:00:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-19 01:00:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-19 01:00:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-19 01:00:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-19 01:00:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:00:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-19 01:00:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-19 01:00:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-19 01:00:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-19 01:00:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-19 01:00:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-19 01:00:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-19 01:00:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-19 01:00:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-19 01:00:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-19 01:00:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-19 01:00:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-19 01:00:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 01:00:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-19 01:00:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 01:00:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-19 01:00:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-19 01:00:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 01:00:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 01:00:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 01:00:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 01:00:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-19 01:00:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 01:00:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-19 01:00:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-19 01:00:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 01:00:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-19 01:00:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-19 01:00:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-19 01:00:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:00:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-19 01:00:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:00:47,812 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:00:47,812 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-19 01:00:47,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:00:47 BoogieIcfgContainer [2020-08-19 01:00:47,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:00:47,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:00:47,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:00:47,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:00:47,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:00:45" (1/3) ... [2020-08-19 01:00:47,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c568b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:00:47, skipping insertion in model container [2020-08-19 01:00:47,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:00:46" (2/3) ... [2020-08-19 01:00:47,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c568b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:00:47, skipping insertion in model container [2020-08-19 01:00:47,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:00:47" (3/3) ... [2020-08-19 01:00:47,828 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product34.cil.c [2020-08-19 01:00:47,839 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:00:47,847 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:00:47,862 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:00:47,888 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:00:47,888 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:00:47,889 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:00:47,889 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:00:47,889 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:00:47,889 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:00:47,889 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:00:47,890 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:00:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-08-19 01:00:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 01:00:47,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:00:47,924 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] [2020-08-19 01:00:47,924 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:00:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:00:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash -368094870, now seen corresponding path program 1 times [2020-08-19 01:00:47,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:00:47,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168343845] [2020-08-19 01:00:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:00:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:48,631 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:00:48,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:00:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:48,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:00:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:48,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:00:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:48,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:00:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:48,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:00:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:48,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 01:00:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:48,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 01:00:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:00:48,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168343845] [2020-08-19 01:00:48,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:00:48,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:00:48,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411858408] [2020-08-19 01:00:48,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:00:48,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:00:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:00:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:00:48,782 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 3 states. [2020-08-19 01:00:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:00:49,860 INFO L93 Difference]: Finished difference Result 258 states and 341 transitions. [2020-08-19 01:00:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:00:49,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-19 01:00:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:00:49,878 INFO L225 Difference]: With dead ends: 258 [2020-08-19 01:00:49,879 INFO L226 Difference]: Without dead ends: 140 [2020-08-19 01:00:49,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:00:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-19 01:00:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2020-08-19 01:00:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-19 01:00:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2020-08-19 01:00:50,014 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 46 [2020-08-19 01:00:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:00:50,015 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2020-08-19 01:00:50,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:00:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2020-08-19 01:00:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 01:00:50,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:00:50,025 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] [2020-08-19 01:00:50,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:00:50,026 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:00:50,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:00:50,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1630578526, now seen corresponding path program 1 times [2020-08-19 01:00:50,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:00:50,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670575245] [2020-08-19 01:00:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:00:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:50,423 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:00:50,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:00:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:50,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:00:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:50,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:00:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:50,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:00:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:50,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:00:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:50,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 01:00:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:50,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 01:00:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:00:50,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670575245] [2020-08-19 01:00:50,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:00:50,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:00:50,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951609207] [2020-08-19 01:00:50,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:00:50,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:00:50,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:00:50,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:00:50,499 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand 4 states. [2020-08-19 01:00:50,982 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:00:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:00:51,717 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2020-08-19 01:00:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:00:51,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-19 01:00:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:00:51,728 INFO L225 Difference]: With dead ends: 187 [2020-08-19 01:00:51,728 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 01:00:51,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:00:51,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 01:00:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-08-19 01:00:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 01:00:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2020-08-19 01:00:51,771 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 47 [2020-08-19 01:00:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:00:51,771 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2020-08-19 01:00:51,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:00:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2020-08-19 01:00:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 01:00:51,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:00:51,774 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] [2020-08-19 01:00:51,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:00:51,774 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:00:51,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:00:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1910957979, now seen corresponding path program 1 times [2020-08-19 01:00:51,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:00:51,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061028329] [2020-08-19 01:00:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:00:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:52,096 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:00:52,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:00:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:52,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:00:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:52,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:00:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:52,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:00:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:52,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:00:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:52,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 01:00:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:52,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-19 01:00:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:00:52,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061028329] [2020-08-19 01:00:52,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:00:52,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 01:00:52,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038881113] [2020-08-19 01:00:52,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:00:52,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:00:52,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:00:52,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:00:52,234 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand 8 states. [2020-08-19 01:00:52,661 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:00:53,009 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:00:53,253 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:00:53,500 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:00:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:00:54,479 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2020-08-19 01:00:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:00:54,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-19 01:00:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:00:54,484 INFO L225 Difference]: With dead ends: 200 [2020-08-19 01:00:54,484 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 01:00:54,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:00:54,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 01:00:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-08-19 01:00:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 01:00:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-08-19 01:00:54,515 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 52 [2020-08-19 01:00:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:00:54,515 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-08-19 01:00:54,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:00:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-08-19 01:00:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 01:00:54,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:00:54,517 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] [2020-08-19 01:00:54,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:00:54,518 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:00:54,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:00:54,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2015382800, now seen corresponding path program 1 times [2020-08-19 01:00:54,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:00:54,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728246142] [2020-08-19 01:00:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:00:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,761 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:00:54,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:00:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:00:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:00:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:00:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:00:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 01:00:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:00:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 01:00:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 01:00:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:00:54,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728246142] [2020-08-19 01:00:54,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:00:54,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 01:00:54,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150954935] [2020-08-19 01:00:54,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:00:54,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:00:54,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:00:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:00:54,899 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 6 states. [2020-08-19 01:00:55,248 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:00:56,341 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:00:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:00:56,749 INFO L93 Difference]: Finished difference Result 288 states and 356 transitions. [2020-08-19 01:00:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:00:56,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-19 01:00:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:00:56,754 INFO L225 Difference]: With dead ends: 288 [2020-08-19 01:00:56,754 INFO L226 Difference]: Without dead ends: 212 [2020-08-19 01:00:56,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:00:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-08-19 01:00:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 169. [2020-08-19 01:00:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-19 01:00:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 193 transitions. [2020-08-19 01:00:56,801 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 193 transitions. Word has length 60 [2020-08-19 01:00:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:00:56,802 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 193 transitions. [2020-08-19 01:00:56,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:00:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 193 transitions. [2020-08-19 01:00:56,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 01:00:56,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:00:56,804 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] [2020-08-19 01:00:56,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:00:56,804 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:00:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:00:56,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2082850905, now seen corresponding path program 1 times [2020-08-19 01:00:56,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:00:56,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871021643] [2020-08-19 01:00:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:00:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,117 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:00:57,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:00:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:00:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:00:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:00:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:00:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 01:00:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:00:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:00:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 01:00:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 01:00:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 01:00:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:00:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:00:57,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871021643] [2020-08-19 01:00:57,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:00:57,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-19 01:00:57,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194659848] [2020-08-19 01:00:57,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 01:00:57,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:00:57,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 01:00:57,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:00:57,251 INFO L87 Difference]: Start difference. First operand 169 states and 193 transitions. Second operand 12 states. [2020-08-19 01:00:57,719 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:00:58,028 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:00:58,270 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:00:58,505 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:00:59,063 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:00:59,889 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:01:00,182 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:00,444 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:00,670 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-19 01:01:00,931 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:01,172 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:02,040 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:01:02,329 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:01:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:01:02,871 INFO L93 Difference]: Finished difference Result 604 states and 790 transitions. [2020-08-19 01:01:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 01:01:02,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-19 01:01:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:01:02,884 INFO L225 Difference]: With dead ends: 604 [2020-08-19 01:01:02,884 INFO L226 Difference]: Without dead ends: 459 [2020-08-19 01:01:02,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-19 01:01:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-08-19 01:01:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 397. [2020-08-19 01:01:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-08-19 01:01:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 467 transitions. [2020-08-19 01:01:03,015 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 467 transitions. Word has length 74 [2020-08-19 01:01:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:01:03,016 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 467 transitions. [2020-08-19 01:01:03,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 01:01:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 467 transitions. [2020-08-19 01:01:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-19 01:01:03,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:01:03,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:01:03,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:01:03,021 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:01:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:01:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2117624429, now seen corresponding path program 1 times [2020-08-19 01:01:03,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:01:03,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130623160] [2020-08-19 01:01:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:01:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,294 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:01:03,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:01:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:01:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:01:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:01:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:01:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 01:01:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 01:01:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 01:01:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 01:01:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 01:01:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 01:01:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 01:01:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 01:01:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-19 01:01:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 01:01:03,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130623160] [2020-08-19 01:01:03,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:01:03,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 01:01:03,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841393491] [2020-08-19 01:01:03,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 01:01:03,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:01:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 01:01:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-19 01:01:03,559 INFO L87 Difference]: Start difference. First operand 397 states and 467 transitions. Second operand 13 states. [2020-08-19 01:01:04,395 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:01:04,972 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:01:05,511 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:05,816 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-19 01:01:06,107 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-19 01:01:06,376 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:06,612 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-19 01:01:06,858 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-19 01:01:07,137 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-19 01:01:07,450 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-19 01:01:08,787 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:01:09,041 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-19 01:01:09,296 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:09,613 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:01:10,115 INFO L93 Difference]: Finished difference Result 831 states and 1058 transitions. [2020-08-19 01:01:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 01:01:10,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 119 [2020-08-19 01:01:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:01:10,121 INFO L225 Difference]: With dead ends: 831 [2020-08-19 01:01:10,121 INFO L226 Difference]: Without dead ends: 458 [2020-08-19 01:01:10,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 01:01:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-19 01:01:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 391. [2020-08-19 01:01:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-08-19 01:01:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 461 transitions. [2020-08-19 01:01:10,214 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 461 transitions. Word has length 119 [2020-08-19 01:01:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:01:10,215 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 461 transitions. [2020-08-19 01:01:10,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 01:01:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 461 transitions. [2020-08-19 01:01:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-19 01:01:10,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:01:10,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:01:10,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:01:10,218 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:01:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:01:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1622369259, now seen corresponding path program 1 times [2020-08-19 01:01:10,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:01:10,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931492309] [2020-08-19 01:01:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:01:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,480 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:01:10,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:01:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:01:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:01:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:01:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:01:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 01:01:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 01:01:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 01:01:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 01:01:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 01:01:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 01:01:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-19 01:01:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 01:01:10,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931492309] [2020-08-19 01:01:10,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:01:10,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 01:01:10,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029666294] [2020-08-19 01:01:10,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 01:01:10,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:01:10,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 01:01:10,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:01:10,679 INFO L87 Difference]: Start difference. First operand 391 states and 461 transitions. Second operand 12 states. [2020-08-19 01:01:11,403 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:11,652 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:11,871 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:12,422 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:12,651 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:12,874 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:01:13,560 INFO L93 Difference]: Finished difference Result 709 states and 866 transitions. [2020-08-19 01:01:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 01:01:13,560 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-08-19 01:01:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:01:13,564 INFO L225 Difference]: With dead ends: 709 [2020-08-19 01:01:13,564 INFO L226 Difference]: Without dead ends: 342 [2020-08-19 01:01:13,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-19 01:01:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-08-19 01:01:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 316. [2020-08-19 01:01:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-19 01:01:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 370 transitions. [2020-08-19 01:01:13,671 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 370 transitions. Word has length 111 [2020-08-19 01:01:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:01:13,672 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 370 transitions. [2020-08-19 01:01:13,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 01:01:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 370 transitions. [2020-08-19 01:01:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 01:01:13,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:01:13,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:01:13,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:01:13,677 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:01:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:01:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash 782485200, now seen corresponding path program 1 times [2020-08-19 01:01:13,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:01:13,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44746870] [2020-08-19 01:01:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:01:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,022 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:01:14,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:01:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:01:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:01:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:01:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:01:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 01:01:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 01:01:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 01:01:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 01:01:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 01:01:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 01:01:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 01:01:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 01:01:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-19 01:01:14,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44746870] [2020-08-19 01:01:14,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:01:14,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 01:01:14,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961176843] [2020-08-19 01:01:14,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 01:01:14,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:01:14,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 01:01:14,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:01:14,178 INFO L87 Difference]: Start difference. First operand 316 states and 370 transitions. Second operand 12 states. [2020-08-19 01:01:14,693 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-19 01:01:15,555 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:01:16,095 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-19 01:01:16,396 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:16,618 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:16,850 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:01:17,120 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:17,391 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:18,444 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:01:18,724 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:01:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:01:19,262 INFO L93 Difference]: Finished difference Result 739 states and 931 transitions. [2020-08-19 01:01:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 01:01:19,263 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 115 [2020-08-19 01:01:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:01:19,268 INFO L225 Difference]: With dead ends: 739 [2020-08-19 01:01:19,268 INFO L226 Difference]: Without dead ends: 505 [2020-08-19 01:01:19,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2020-08-19 01:01:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-08-19 01:01:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 421. [2020-08-19 01:01:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-08-19 01:01:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 500 transitions. [2020-08-19 01:01:19,358 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 500 transitions. Word has length 115 [2020-08-19 01:01:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:01:19,359 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 500 transitions. [2020-08-19 01:01:19,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 01:01:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 500 transitions. [2020-08-19 01:01:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-19 01:01:19,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:01:19,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-19 01:01:19,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:01:19,363 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:01:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:01:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1084902701, now seen corresponding path program 2 times [2020-08-19 01:01:19,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:01:19,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520855663] [2020-08-19 01:01:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:01:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,785 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-19 01:01:19,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:01:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:01:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:01:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:01:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:01:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 01:01:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 01:01:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 01:01:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 01:01:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 01:01:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:01:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-19 01:01:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:01:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:19,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-19 01:01:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:20,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-19 01:01:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:20,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-19 01:01:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:20,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:01:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:20,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 01:01:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:20,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-19 01:01:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:01:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-19 01:01:20,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520855663] [2020-08-19 01:01:20,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:01:20,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 01:01:20,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054863330] [2020-08-19 01:01:20,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 01:01:20,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:01:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 01:01:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:01:20,121 INFO L87 Difference]: Start difference. First operand 421 states and 500 transitions. Second operand 14 states. [2020-08-19 01:01:20,871 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:01:21,522 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:01:22,366 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:01:22,652 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:22,904 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:23,164 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:01:23,435 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:23,710 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-19 01:01:24,590 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-19 01:01:24,858 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-19 01:01:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:01:25,869 INFO L93 Difference]: Finished difference Result 1024 states and 1341 transitions. [2020-08-19 01:01:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 01:01:25,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 155 [2020-08-19 01:01:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:01:25,875 INFO L225 Difference]: With dead ends: 1024 [2020-08-19 01:01:25,876 INFO L226 Difference]: Without dead ends: 685 [2020-08-19 01:01:25,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 01:01:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-08-19 01:01:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 422. [2020-08-19 01:01:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-08-19 01:01:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 502 transitions. [2020-08-19 01:01:26,001 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 502 transitions. Word has length 155 [2020-08-19 01:01:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:01:26,002 INFO L479 AbstractCegarLoop]: Abstraction has 422 states and 502 transitions. [2020-08-19 01:01:26,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 01:01:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 502 transitions. [2020-08-19 01:01:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-19 01:01:26,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:01:26,005 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-19 01:01:26,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:01:26,006 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:01:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:01:26,006 INFO L82 PathProgramCache]: Analyzing trace with hash 218697075, now seen corresponding path program 3 times [2020-08-19 01:01:26,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:01:26,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747520792] [2020-08-19 01:01:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:01:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:01:26,076 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:01:26,077 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:01:26,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:01:26,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:01:26 BoogieIcfgContainer [2020-08-19 01:01:26,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:01:26,144 INFO L168 Benchmark]: Toolchain (without parser) took 40449.24 ms. Allocated memory was 137.9 MB in the beginning and 675.3 MB in the end (delta: 537.4 MB). Free memory was 98.9 MB in the beginning and 606.1 MB in the end (delta: -507.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. [2020-08-19 01:01:26,145 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 137.9 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:01:26,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.83 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 98.7 MB in the beginning and 170.2 MB in the end (delta: -71.4 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-08-19 01:01:26,153 INFO L168 Benchmark]: Boogie Preprocessor took 110.59 ms. Allocated memory is still 201.3 MB. Free memory was 170.2 MB in the beginning and 165.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-19 01:01:26,154 INFO L168 Benchmark]: RCFGBuilder took 1289.35 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 165.9 MB in the beginning and 199.6 MB in the end (delta: -33.6 MB). Peak memory consumption was 87.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:01:26,156 INFO L168 Benchmark]: TraceAbstraction took 38315.49 ms. Allocated memory was 231.7 MB in the beginning and 675.3 MB in the end (delta: 443.5 MB). Free memory was 198.1 MB in the beginning and 606.1 MB in the end (delta: -408.0 MB). Peak memory consumption was 35.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:01:26,165 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 137.9 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 728.83 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 98.7 MB in the beginning and 170.2 MB in the end (delta: -71.4 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.59 ms. Allocated memory is still 201.3 MB. Free memory was 170.2 MB in the beginning and 165.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1289.35 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 165.9 MB in the beginning and 199.6 MB in the end (delta: -33.6 MB). Peak memory consumption was 87.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 38315.49 ms. Allocated memory was 231.7 MB in the beginning and 675.3 MB in the end (delta: 443.5 MB). Free memory was 198.1 MB in the beginning and 606.1 MB in the end (delta: -408.0 MB). Peak memory consumption was 35.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 540]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L69] int cleanupTimeShifts = 4; [L282] int pumpRunning = 0; [L283] int systemActive = 1; [L442] int waterLevel = 1; [L443] int methaneLevelCritical = 0; [L714] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L150] int retValue_acc ; [L151] int tmp ; [L155] FCALL select_helpers() [L156] FCALL select_features() [L157] CALL, EXPR valid_product() [L199] int retValue_acc ; [L202] retValue_acc = 1 [L203] return (retValue_acc); [L157] RET, EXPR valid_product() [L157] tmp = valid_product() [L159] COND TRUE \read(tmp) [L161] FCALL setup() [L162] CALL runTest() [L141] CALL test() [L210] int splverifierCounter ; [L211] int tmp ; [L212] int tmp___0 ; [L213] int tmp___1 ; [L214] int tmp___2 ; [L217] splverifierCounter = 0 [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND TRUE \read(tmp) [L231] CALL waterRise() [L460] COND TRUE waterLevel < 2 [L461] waterLevel = waterLevel + 1 [L231] RET waterRise() [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND FALSE !(\read(pumpRunning)) [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND TRUE ! pumpRunning [L323] CALL, EXPR isHighWaterLevel() [L415] int retValue_acc ; [L416] int tmp ; [L417] int tmp___0 ; [L421] CALL, EXPR isHighWaterSensorDry() [L522] int retValue_acc ; [L525] COND FALSE !(waterLevel < 2) [L529] retValue_acc = 0 [L530] return (retValue_acc); [L421] RET, EXPR isHighWaterSensorDry() [L421] tmp = isHighWaterSensorDry() [L423] COND FALSE !(\read(tmp)) [L426] tmp___0 = 1 [L428] retValue_acc = tmp___0 [L429] return (retValue_acc); [L323] RET, EXPR isHighWaterLevel() [L323] tmp = isHighWaterLevel() [L325] COND TRUE \read(tmp) [L327] CALL activatePump() [L346] pumpRunning = 1 [L327] RET activatePump() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L304] RET __utac_acc__Specification4_spec__1() [L264] RET timeShift() [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND FALSE !(\read(tmp)) [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND TRUE \read(pumpRunning) [L291] CALL lowerWaterLevel() [L448] COND TRUE waterLevel > 0 [L449] waterLevel = waterLevel - 1 [L291] RET lowerWaterLevel() [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND FALSE !(! pumpRunning) [L336] FCALL processEnvironment__wrappee__base() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L304] RET __utac_acc__Specification4_spec__1() [L264] RET timeShift() [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND FALSE !(\read(tmp)) [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND TRUE \read(pumpRunning) [L291] CALL lowerWaterLevel() [L448] COND TRUE waterLevel > 0 [L449] waterLevel = waterLevel - 1 [L291] RET lowerWaterLevel() [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND FALSE !(! pumpRunning) [L336] FCALL processEnvironment__wrappee__base() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND TRUE tmp == 0 [L53] CALL, EXPR isPumpRunning() [L370] int retValue_acc ; [L373] retValue_acc = pumpRunning [L374] return (retValue_acc); [L53] RET, EXPR isPumpRunning() [L53] tmp___0 = isPumpRunning() [L55] COND TRUE \read(tmp___0) [L57] CALL __automaton_fail() [L540] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 219 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 38.1s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 32.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 971 SDtfs, 2437 SDslu, 1391 SDs, 0 SdLazy, 6716 SolverSat, 1761 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 439 GetRequests, 275 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 17.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=422occurred 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: 0.7s AutomataMinimizationTime, 9 MinimizatonAttempts, 624 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 930 NumberOfCodeBlocks, 930 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 770 ConstructedInterpolants, 0 QuantifiedInterpolants, 286969 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 141/169 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...